Combustor assembly and gas water heater

Abstract

The utility model relates to and discloses a burner assembly and a gas water heater. Relates to the technical field of water heaters. The combustor specifically comprises a combustor shell internally provided with a combustion cavity, an air inlet pipeline arranged on one side of the combustor shell and a filtering piece arranged on the combustor shell, and the combustion cavity is used for forming flames; a primary air inlet for communicating the combustion cavity with the outside is formed in one side of the combustor shell, a secondary air inlet for communicating the combustion cavity with the outside is further formed in the combustor shell, and the filtering piece covers the outer side of the secondary air inlet. The filter part is arranged on the combustor shell and covers the outer side of the secondary air inlet, so that under the action of the fan, in the process that outside air enters the combustion cavity through the secondary air inlet, the filter part filters outside impurities, and the outside impurities are prevented from entering the combustor assembly; therefore, the overall combustion stability of the combustor assembly is improved, and it is guaranteed that gas is fully combusted in the combustor assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a burner assembly and a gas water heater. Background Art

[0002] Water heaters are an indispensable device for home life. In terms of energy used, they can be roughly divided into gas water heaters, electric water heaters and solar water heaters, among which gas water heaters are widely used by the general public. As the main component of a gas water heater, the combustion heat exchange system is generally composed of a combustion heat exchange component and a gas supply component, and the combustion heat exchange component includes a fan component, a heat exchange component and a burner component. For the upper draft combustion heat exchange system, the fan component is placed above the heat exchange component, and the burner component is set below the heat exchange component.

[0003] Existing burner assemblies are usually provided with a primary air inlet and a secondary air inlet. When working, the burner assembly receives the gas from the gas supply assembly through the primary air inlet and burns it. The high-temperature flue gas after combustion flows out of the burner assembly under the suction of the fan assembly, flows through the heat exchange assembly and exchanges heat with the water to be heated, then flows to the fan assembly and is discharged. In addition to draining the high-temperature flue gas after combustion, the fan assembly also drives external air into the burner assembly from the primary air inlet and the secondary air inlet to provide sufficient oxygen for the combustion of the gas.

[0004] At present, the secondary air inlet of the burner assembly is provided. During the process that the fan assembly draws external air into the burner assembly through the secondary air inlet, external impurities are also sucked into the burner assembly through the secondary air inlet. On the one hand, the external impurities are stuck in the burner assembly, hindering the inflow of external air, which may easily lead to insufficient oxygen supply, incomplete combustion, and excessive CO. On the other hand, the external impurities are mixed into the gas in the burner assembly, hindering the combustion of the gas, which may easily lead to unstable combustion, thereby affecting the heat exchange efficiency of the combustion heat exchange system. Utility Model Content

[0005] The purpose of the utility model is to provide a burner assembly and a gas water heater to address the deficiencies of the above-mentioned prior art, which can prevent external impurities from entering the burner assembly during the process of providing oxygen to the burner assembly, thereby improving the overall combustion stability of the burner assembly and ensuring that the gas is fully burned in the burner assembly.

[0006] The utility model proposes a burner assembly, including a burner shell with a combustion chamber provided therein, an air intake pipe arranged on one side of the burner shell, and a filter element arranged on the burner shell, the combustion chamber is used to form a flame, and the top of the combustion chamber is provided with a flame outlet channel connected to a heat exchanger; one side of the burner shell is provided with a primary air inlet connecting the combustion chamber with the outside, one end of the air intake pipe is connected to the primary air inlet, and the other end is connected to a gas supply assembly, the burner shell is also provided with a secondary air inlet connecting the combustion chamber with the outside, and the filter element cover is arranged on the outside of the secondary air inlet.

[0007] Furthermore, the filter element includes a filter screen covered on the outside of the secondary air inlet, and a mounting plate for mounting the filter screen on the burner housing, and the filter screen is provided with filter holes for filtering air.

[0008] Furthermore, the filter screen includes a bottom surface and multiple side surfaces extending upward from the bottom surface, the bottom surface is provided with a recessed area, the periphery of the recessed area is smoothly connected to the multiple side surfaces respectively, and the filter holes are multiple and distributed on the bottom surface and the multiple side surfaces.

[0009] Furthermore, when the filter cover is arranged outside the secondary air inlet, the secondary air inlet is completely covered, and the mesh number of the filter is 10 to 60 meshes.

[0010] Furthermore, the mounting plate surrounds the outer side of the filter screen, and the mounting plate is connected to the burner housing to mount the filter screen on the burner housing.

[0011] Furthermore, the mounting plate and the burner housing are detachably assembled.

[0012] Furthermore, the burner housing includes a plurality of side panels connected in sequence to form a circle, and a bottom plate arranged at the bottom of the plurality of side panels, the plurality of side panels and the bottom plate form a combustion chamber with a top opening, the top opening of the combustion chamber is the flame outlet channel, the primary air inlet is arranged on the side panels, and the secondary air inlet is arranged on the bottom plate.

[0013] Furthermore, a connecting plate for connecting to a heat exchanger is provided on the top of the side plate, and the connecting plate and the heat exchanger are detachably assembled.

[0014] Furthermore, the connecting plate includes an abutment portion extending horizontally on the side plate, and a limiting portion extending vertically on the abutment portion, the abutment portion is used to connect with the heat exchanger, and the limiting portion is used to limit the connection between the abutment portion and the heat exchanger.

[0015] The utility model also provides a gas water heater, comprising the burner assembly mentioned above.

[0016] The utility model provides a burner assembly and a gas water heater with the following gain effects:

[0017] (1) A filter is provided on the burner housing of the burner assembly, and the filter cover is provided on the outside of the secondary air inlet. Therefore, under the action of the fan, when the outside air enters the combustion chamber through the secondary air inlet, the filter filters the outside impurities, thereby preventing the outside impurities from entering the burner assembly, thereby improving the overall combustion stability of the burner assembly and ensuring that the gas is fully burned in the burner assembly;

[0018] (2) A connecting plate is provided on the top of the side plate of the burner assembly, and the assembly of the connecting plate and the heat exchanger frame is detachable. Therefore, by connecting and disassembling the connecting plate and the heat exchanger frame, the burner assembly can be installed and disassembled at the bottom of the heat exchanger, thereby facilitating the maintenance and replacement of the burner assembly on the heat exchanger, thereby improving the practicality of the burner assembly;

[0019] (3) The connecting plate of the burner assembly includes an abutment portion and a limiting portion, wherein the abutment portion extends horizontally on the side plate, and the limiting portion extends vertically on the abutment portion. The limiting portion cooperates with the heat exchanger frame on both sides to limit the installation position of the connecting plate at the bottom of the heat exchanger frame, so that the flame outlet channel at the top of the combustion chamber is aligned with the center position of the heat exchanger frame, and then the flame formed in the combustion chamber passes through the flame outlet channel to uniformly heat the air in the heat exchanger frame, thereby improving the heating efficiency of the gas water heater;

[0020] (4) The filter element of the burner assembly includes a filter screen and a mounting plate. The mounting plate mounts the filter screen on the outside of the secondary air inlet disposed on the bottom plate. The filter screen is provided with filter holes, through which large particles of impurities in the outside air are blocked, thereby preventing the outside impurities from entering the burner assembly, thereby improving the overall combustion stability of the burner assembly and ensuring that the gas is fully burned in the burner assembly;

[0021] (5) The filter screen of the burner assembly completely covers the secondary air inlet on the bottom plate. Therefore, when the outside air enters the combustion chamber through the secondary air inlet, it needs to pass through the filter screen first, so that the filter holes on the filter screen can filter the large particles of impurities in the outside air, further improving the overall combustion stability of the burner assembly and ensuring that the gas is fully burned in the burner assembly;

[0022] (6) The filter screen of the burner assembly is a W-shaped structure. When the outside air enters from the multiple filter holes on the bottom and side of the W-shaped filter screen, the air volume can be dispersed and the air can be guided to enter at a uniform speed, thereby preventing the air volume from gathering sharply to generate eddy noise, which will bring a poor user experience to the user, thereby improving the practicality of the burner assembly, and making the air intake of the burner assembly uniform, thereby improving the overall combustion stability of the burner assembly;

[0023] (7) The filter holes of the burner assembly are distributed in multiple numbers on the bottom and side surfaces of the W-shaped filter screen, thereby increasing the amount of air entering the combustion chamber, thereby providing sufficient oxygen for the combustion of the gas in the combustion chamber, ensuring that the gas is fully burned in the burner assembly, and preventing incomplete combustion of the gas, which may lead to excessive CO. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0025] Figure 1 A cross-sectional schematic diagram of a burner assembly according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure in which a filter element of a burner assembly according to an embodiment of the utility model is installed at the bottom of a burner housing;

[0027] Figure 3 This is a schematic structural diagram of a burner housing of a burner assembly according to an embodiment of the utility model;

[0028] Figure 4 This is a schematic structural diagram of a filter element of a burner assembly according to an embodiment of the utility model;

[0029] Figure 5 It is a cross-sectional schematic diagram of a gas water heater according to an embodiment of the utility model.

[0030] In the figure: 1. burner assembly; 11. burner housing; 111. combustion chamber; 112. side panel; 1121. primary air inlet; 1122. connecting plate; 113. bottom plate; 1131. secondary air inlet; 12. air intake duct; 13. filter element; 131. filter screen; 1311. filter hole; 132. mounting plate; 2. heat exchanger; 3. fan assembly. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 to Figure 5 A burner assembly 1 according to an embodiment of the utility model comprises a burner housing 11 with a combustion chamber 111 therein, an air intake pipe 12 arranged on one side of the burner housing 11, and a filter element 13 arranged on the burner housing 11, the combustion chamber 111 is used to form a flame, and a flame outlet channel connected to a heat exchanger 2 is arranged on the top of the combustion chamber 111; a primary air inlet 1121 connecting the combustion chamber 111 with the outside is arranged on one side of the burner housing 11, one end of the air intake pipe 12 is connected to the primary air inlet 1121, and the other end is connected to a gas supply assembly; a secondary air inlet 1131 connecting the combustion chamber 111 with the outside is also arranged on the burner housing 11, and the filter element 13 cover is arranged on the outside of the secondary air inlet 1131.

[0033] In the present application, the burner assembly 1 includes a burner housing 11, an air intake pipe 12 and a filter 13. A combustion chamber 111 is provided in the burner housing 11. A primary air inlet 1121 is provided on one side of the burner housing 11. The primary air inlet 1121 connects one side of the combustion chamber 111 with the outside. One end of the air intake pipe 12 is connected to the primary air inlet 1121, and the other end is connected to the gas supply assembly, so that the gas provided by the gas supply assembly enters the combustion chamber 111 through the primary air inlet 1121 after flowing through the air intake pipe 12.

[0034] A secondary air inlet 1131 is also provided on the burner housing 11, and the secondary air inlet 1131 connects the combustion chamber 111 with the outside, so that the outside air can enter the combustion chamber 111 through the secondary air inlet 1131. In the combustion chamber 111, while the gas burns to form a flame, the outside air enters the combustion chamber 111 through the secondary air inlet 1131, thereby providing sufficient oxygen for the combustion of the gas, thereby preventing insufficient oxygen supply, incomplete combustion of the gas, and causing excessive CO.

[0035] The present embodiment also provides a gas water heater, including the burner assembly 1 and the heat exchanger 2, wherein the burner assembly 1 is fixedly mounted at the bottom of the heat exchanger 2. A flame outlet channel is provided at the top of the combustion chamber 111 to connect the combustion chamber 111 with the outside, and when the burner housing 11 is connected to the frame of the heat exchanger 2, the flame outlet channel is connected to the frame of the heat exchanger 2, so that the flame formed in the combustion chamber 111 can enter the frame of the heat exchanger 2 through the flame outlet channel, and then generate high-temperature flue gas in the frame of the heat exchanger 2, providing heat for the heat exchange between the heat exchanger 2 and the cold water, and realizing the function of the heat exchanger 2 heating the cold water.

[0036] It can be foreseen that: the gas water heater in this embodiment also includes a fan assembly 3, which is arranged above the heat exchanger 2. The fan assembly 3 forms a negative pressure through the action of the fan assembly 3, thereby drawing the outside air into the combustion chamber 111 through the secondary air inlet 1131, so that the outside air flows into the combustion chamber 111 faster, thereby providing sufficient oxygen for the combustion of the gas.

[0037] The flame formed in the combustion chamber 111 enters the frame of the heat exchanger 2 through the flame outlet channel, generating high-temperature flue gas in the space inside the frame of the heat exchanger 2. The negative pressure formed by the fan assembly 3 also draws up the high-temperature flue gas generated in the frame of the heat exchanger 2, causing it to exchange heat with the cold water passed into the heat exchanger 2, and the exhaust gas after the heat exchange is discharged.

[0038] Since in the present application, a filter element 13 is provided on the burner housing 11, and the filter element 13 cover is arranged on the outside of the secondary air inlet 1131, therefore, under the action of the fan assembly 3, when the outside air enters the combustion chamber 111 through the secondary air inlet 1131, the filter element 13 filters the external impurities, thereby preventing the external impurities from entering the burner assembly 1, thereby improving the overall combustion stability of the burner assembly 1, and ensuring that the gas is fully burned in the burner assembly 1.

[0039] In this embodiment, the burner housing 11 includes a plurality of side panels 112 connected in sequence to form a circle, and a bottom plate 113 arranged at the bottom of the plurality of side panels 112. The plurality of side panels 112 and the bottom plate form a combustion chamber 111 with a top opening, and the top opening of the combustion chamber 111 is a flame outlet channel.

[0040] In the present application, the burner housing 11 includes a plurality of side panels 112 and a bottom panel 113. The plurality of side panels 112 are connected in sequence to form a circle. The bottom panel 113 is arranged at the bottom of the plurality of side panels 112, so that the plurality of side panels 112 and the bottom panel 113 form a combustion chamber 111 with a top opening. The top opening of the combustion chamber 111 is the flame outlet channel.

[0041] The primary air inlet 1121 is set on one of the side panels 112 and connected to the side panel 112 through the air intake pipe 12. The primary air inlet 1121 is connected to the gas supply component so that the gas provided by the gas supply component flows through the air intake pipe 12 and enters the combustion chamber 111 through the primary air inlet 1121.

[0042] Specifically, in this embodiment, the secondary air inlet 1131 can be set on one of the side plates 112, that is, the filter 13 is set on one side of the burner housing 11, so that the filter 13 cover is set on the outside of the secondary air inlet 1131; the secondary air inlet 1131 can also be set on the bottom plate 113, that is, the filter 13 is set at the bottom of the burner housing 11, so that the filter 13 cover is set on the outside of the secondary air inlet 1131, which can be determined according to actual production needs. In the following, the secondary air inlet 1131 is set on the bottom plate 113 and the filter 13 is set at the bottom of the burner housing 11 as an example for explanation.

[0043] The secondary air inlet 1131 is set on the bottom plate 113, and the filter 13 is connected to the bottom plate 113, so that the filter 13 cover is set on the outside of the secondary air inlet 1131. When the external air enters the combustion chamber 111 through the secondary air inlet 1131, the filter 13 filters the external impurities.

[0044] Furthermore, in this embodiment, a connecting plate 1122 is provided on the top of the side plate 112, and the burner housing 11 is connected to the frame of the heat exchanger 2 through the connection between the connecting plate 1122 and the frame of the heat exchanger 2, thereby realizing the installation of the burner assembly 1 at the bottom of the heat exchanger 2.

[0045] In the present application, the connection plate 1122 and the frame of the heat exchanger 2 are detachably assembled, so the burner assembly 1 can be installed and removed at the bottom of the heat exchanger 2 by connecting and removing the connection plate 1122 and the frame of the heat exchanger 2, thereby facilitating the maintenance and replacement of the burner assembly 1 on the heat exchanger 2, thereby improving the practicality of the burner assembly 1. Specifically, the connection plate 1122 can be detachably connected to the frame of the heat exchanger 2 by snapping or screwing.

[0046] Specifically, in this embodiment, the connecting plate 1122 includes an abutting portion and a limiting portion, wherein the abutting portion extends horizontally on the side plate 112, and the limiting portion extends vertically on the abutting portion. When the connecting plate 1122 is connected to the frame of the heat exchanger 2, the abutting portion abuts against the bottom of the frame of the heat exchanger 2, and the limiting portion cooperates with the frame of the heat exchanger 2 on both sides to limit the installation position of the connecting plate 1122 at the bottom of the frame of the heat exchanger 2, so that the flame outlet channel at the top of the combustion chamber 111 is aligned with the center position of the frame of the heat exchanger 2, and then the flame formed in the combustion chamber 111 passes through the flame outlet channel to uniformly heat the air in the frame of the heat exchanger 2, thereby improving the heating efficiency of the gas water heater.

[0047] In this embodiment, the filter element 13 includes a filter screen 131 covered on the outside of the secondary air inlet 1131, and a mounting plate 132 for mounting the filter screen 131 on the bottom of the burner housing 11, and the filter screen 131 is provided with a filter hole 1311 for filtering air. In the present application, the filter element 13 includes the filter screen 131 and the mounting plate 132, and the mounting plate 132 is connected to the bottom plate 113 at the bottom of the burner housing 11, so that the filter screen 131 is covered on the outside of the secondary air inlet 1131 provided on the bottom plate 113.

[0048] A filter hole 1311 is provided on the filter screen 131. When the fan assembly 3 draws external air into the combustion chamber 111 through the secondary air inlet 1131, the filter hole 1311 blocks large particles of impurities in the external air, thereby preventing external impurities from entering the burner assembly 1, thereby improving the overall combustion stability of the burner assembly 1 and ensuring that the gas is fully burned in the burner assembly 1.

[0049] In this embodiment, the mounting plate 132 is connected to the base plate 113 at the bottom of the burner housing 11, so that when the filter 131 is covered on the outside of the secondary air inlet 1131 arranged on the base plate 113, the filter 131 completely covers the secondary air inlet 1131 on the base plate 113. Therefore, when the outside air enters the combustion chamber 111 through the secondary air inlet 1131, it needs to pass through the filter 131 first, so that the filter holes 1311 on the filter 131 can filter the large particles of impurities in the outside air, further improving the overall combustion stability of the burner assembly 1 and ensuring that the gas is fully burned in the burner assembly 1.

[0050] In actual production, the higher the mesh number of the filter 131, the better the filtering effect, but the higher the cost. Therefore, in the present application, the mesh number of the filter 131 is preferably between 10 and 60 meshes, which not only ensures that the filter 131 has a good filtering effect on the outside air entering the combustion chamber 111, improves the overall combustion stability of the burner assembly 1, but also makes the overall processing cost of the burner assembly 1 not too high, thereby enhancing the practicality of the burner assembly 1. Specifically, in actual production, the mesh number of the filter 131 can be determined according to the air intake requirements of the burner assembly 1.

[0051] Specifically, in this embodiment, the filter screen 131 can be a W-shaped structure filter screen, that is, the filter screen 131 includes a bottom surface and multiple side surfaces, and the multiple side surfaces extend upward from the bottom surface. A recessed area is provided on the bottom surface, and the periphery of the recessed area is smoothly connected to the multiple side surfaces through arc surfaces, so that the filter screen 131 forms a W-shaped structure, and the filter holes 1311 are distributed on the bottom surface and multiple side surfaces of the W-shaped structure filter screen.

[0052] When the fan assembly 3 draws outside air into the combustion chamber 111 through the secondary air inlet 1131, the outside air passes through the bottom surface and multiple filter holes 1311 on the side of the W-shaped structure filter. On the one hand, it can increase the amount of air entering the combustion chamber 111, thereby providing sufficient oxygen for the combustion of the gas in the combustion chamber 111, ensuring that the gas is fully burned in the burner assembly 1, and preventing incomplete combustion of the gas, which may lead to excessive CO.

[0053] On the other hand, when the outside air enters from the multiple filter holes 1311 on the bottom and side of the W-shaped structure filter, the wind volume can be dispersed and the air intake can be guided to be uniform, thereby preventing the wind volume from gathering rapidly to generate eddy noise, which would bring a poor user experience and improve the practicality of the burner assembly 1. The air intake of the burner assembly 1 is uniform, thereby improving the overall combustion stability of the burner assembly 1.

[0054] In this embodiment, the mounting plate 132 surrounds the outer side of the filter screen 131. When the filter element 13 is installed at the bottom of the burner housing 11, the mounting plate 132 surrounding the outer side of the filter screen 131 is simultaneously connected to the base plate 113 at the bottom of the burner housing 11, thereby enhancing the stability of the installation of the filter element 13 at the bottom of the burner housing 11, and further enhancing the overall stability of the burner assembly 1.

[0055] In this embodiment, the assembly of the mounting plate 132 and the base plate 113 is detachable, so the installation and removal of the filter element 13 at the bottom of the burner housing 11 can be achieved through the connection and disassembly of the mounting plate 132 and the base plate 113, thereby facilitating the maintenance and replacement of the filter element 13, thereby enhancing the practicality of the burner assembly 1.

[0056] Specifically, a through hole can be provided on the mounting plate 132, and a threaded hole can be provided at a corresponding position on the bottom plate 113. After one end of a bolt or a screw passes through the through hole on the mounting plate 132, it is screwed with the threaded hole on the bottom plate 113, thereby realizing a fixed connection between the mounting plate 132 and the bottom plate 113, and further realizing a fixed installation of the filter element 13 at the bottom of the burner housing 11. On the contrary, the mounting plate 132 can be removed from the bottom plate 113 by screwing the bolt or the screw out of the threaded hole on the bottom plate 113, so that the removal of the filter element 13 at the bottom of the burner housing 11 is simple and convenient, and easy to implement.

[0057] In this embodiment, the mounting plate 132 and the bottom plate 113 are assembled and detachable, and a slide groove may be provided at the bottom of the bottom plate 113, and a slide rail may be provided on the mounting plate 132. Through the sliding cooperation between the slide rail and the slide groove, the mounting plate 132 can be installed and removed from the bottom plate 113 by pulling and pulling, and the installation and removal of the filter 13 at the bottom of the burner housing 11 are further simple and convenient, and easy to implement.

[0058] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A burner assembly, characterized in that: The invention comprises a burner shell (11) having a combustion chamber (111) therein, an air intake pipe (12) arranged on one side of the burner shell (11), and a filter element (13) arranged on the burner shell (11); the combustion chamber (111) is used to form a flame, and a flame outlet channel connected to a heat exchanger (2) is arranged on the top of the combustion chamber (111); a primary air inlet (1121) for connecting the combustion chamber (111) with the outside is arranged on one side of the burner shell (11); one end of the air intake pipe (12) is connected to the primary air inlet (1121) and the other end is connected to a gas supply component; the burner shell (11) is also provided with a secondary air inlet (1131) for connecting the combustion chamber (111) with the outside; and the filter element (13) is covered on the outside of the secondary air inlet (1131).

2. A burner assembly as claimed in claim 1, characterized in that: The filter element (13) comprises a filter screen (131) which is covered on the outside of the secondary air inlet (1131), and a mounting plate (132) for mounting the filter screen (131) on the burner housing (11); the filter screen (131) is provided with filter holes (1311) for filtering air.

3. A burner assembly as claimed in claim 2, characterized in that: The filter screen (131) comprises a bottom surface and a plurality of side surfaces extending upward from the bottom surface, the bottom surface is provided with a recessed area, the periphery of the recessed area is smoothly connected to the plurality of side surfaces respectively, and the filter holes (1311) are a plurality distributed on the bottom surface and the plurality of side surfaces.

4. A burner assembly as claimed in claim 2, characterized in that: When the filter screen (131) is arranged outside the secondary air inlet (1131), the secondary air inlet (1131) is completely covered, and the mesh number of the filter screen (131) is 10 to 60 meshes.

5. A burner assembly as claimed in claim 2, characterized in that: The mounting plate (132) surrounds the outer side of the filter screen (131), and the mounting plate (132) is connected to the burner housing (11) to mount the filter screen (131) on the burner housing (11).

6. A burner assembly as claimed in claim 5, characterized in that: The mounting plate (132) and the burner housing (11) are detachably assembled.

7. A burner assembly as claimed in claim 1, characterized in that: The burner housing (11) comprises a plurality of side panels (112) connected in sequence to form a circle, and a bottom plate (113) arranged at the bottom of the plurality of side panels (112); the plurality of side panels (112) and the bottom plate (113) form a combustion chamber (111) with a top opening; the top opening of the combustion chamber (111) is the flame outlet channel; the primary air inlet (1121) is arranged on the side panels (112), and the secondary air inlet (1131) is arranged on the bottom plate (113).

8. A burner assembly as claimed in claim 7, characterized in that: A connecting plate (1122) for connecting to the heat exchanger (2) is provided on the top of the side plate (112), and the connecting plate (1122) and the heat exchanger (2) are detachably assembled.

9. A burner assembly as claimed in claim 8, characterized in that: The connecting plate (1122) comprises an abutment portion extending horizontally on the side plate (112), and a limiting portion extending vertically on the abutment portion, wherein the abutment portion is used to connect to the heat exchanger (2), and the limiting portion is used to limit the connection between the abutment portion and the heat exchanger (2).

10. A gas water heater, characterized in that: Comprising a burner assembly according to any one of claims 1-9.

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