Combustor and gas water heater

Abstract

The utility model discloses a burner and a gas water heater. The combustor comprises a shell, the shell comprises a fence and a bottom plate, a plurality of first ventilation openings are formed in one side wall of the fence, and positioning ribs are arranged on the inner surface of the fence and surround the peripheries of the first ventilation openings; the bottom plate is arranged at the bottom of the fence, a plurality of mounting clamping grooves are formed in the bottom plate, and the mounting clamping grooves are arranged opposite to the corresponding positioning ribs; and the multiple fire rows are arranged side by side and arranged in the shell, injection openings of injection sections of the fire rows are connected with the corresponding positioning ribs, and the fire rows are further clamped in the corresponding mounting clamping grooves. The positioning rib is of an annular structure and is inserted into the injection opening. The mixing uniformity of gas and air in a fire grate of the combustor is improved, so that the combustion sufficiency of the gas is improved. The manufacturing cost is reduced, and the assembling efficiency is improved.

Description

Technical Field

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

[0002] At present, water heaters are household appliances commonly used in people's daily lives. Water heaters are divided into gas water heaters and electric water heaters. Among them, gas water heaters are widely used because of their convenience. Conventional gas water heaters usually include components such as a fan, a burner, a combustion chamber and a heat exchanger. The burner burns gas in the combustion chamber to heat the water flowing through the heat exchanger.

[0003] The burner is an important part of the gas water heater. Chinese Patent Publication No. CN 114396619 A discloses a burner and a gas water heater which usually include a shell and a plurality of fire grates arranged side by side in the shell. When the fire grates are in use, part of the air enters the fire grates through high-speed gas injection under the action of the fan and mixes with the gas. This part of air is called primary air; the other part enters the burner through the secondary air plate below the fire grates and participates in combustion above the fire holes of the fire grates. This part of air is called secondary air.

[0004] However, in the actual assembly process, an additional combustion rack needs to be set in the shell to install the fire grate. On the one hand, the increase in parts leads to higher manufacturing costs, and on the other hand, the complicated assembly process leads to lower assembly efficiency. In view of this, how to design a technology for gas water heaters that reduces manufacturing costs and improves assembly efficiency is the technical problem to be solved by the utility model. Utility Model Content

[0005] The utility model provides a burner and a gas water heater, which can reduce manufacturing costs and improve assembly efficiency.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] In one aspect, the utility model provides a burner, comprising:

[0008] The outer shell comprises an enclosure and a bottom plate, a plurality of first vents are arranged on one side wall of the enclosure, and positioning ribs are arranged on the inner surface of the enclosure around the outer periphery of the first vents; the bottom plate is arranged at the bottom of the enclosure, and a plurality of mounting slots are arranged on the bottom plate, and the mounting slots are arranged opposite to the corresponding positioning ribs;

[0009] A plurality of fire bars are arranged side by side and disposed in the shell, the ejection ports of the ejection sections of the fire bars are connected to the corresponding positioning ribs, and the fire bars are also stuck in the corresponding mounting slots.

[0010] The positioning rib is an annular structure, and the positioning rib is inserted into the injection port.

[0011] In one embodiment of the present application, the enclosure includes a first mounting plate and a second mounting plate, the cross section of the first mounting plate is a U-shaped structure, the second mounting plate is connected between two ends of the first mounting plate, and the bottom plate is arranged at the bottom of the second mounting plate;

[0012] Wherein, the second mounting plate is provided with the first vent and the positioning rib.

[0013] In one embodiment of the present application, the housing further comprises an inner lining plate, which is disposed on the inner wall of the first mounting plate and arranged outside the fire bar;

[0014] A positioning portion extending toward the second mounting plate is provided on the inner lining plate at a position opposite to the second mounting plate, and a plurality of positioning slots are provided at an edge of the positioning portion;

[0015] Wherein, the fire bar is clamped in the corresponding positioning slot.

[0016] In one embodiment of the present application, a positioning tongue extending inward and upward is further provided on the first mounting plate, and the lower edge of the lining plate is clamped between the positioning tongue and the first mounting plate.

[0017] In one embodiment of the present application, the positioning ribs, the installation slots and the positioning slots connected and matched with the same fire bar are arranged in sequence;

[0018] And / or, the positioning slot is arranged obliquely above the installation slot.

[0019] In one embodiment of the present application, at least one second vent is provided on the bottom plate;

[0020] A secondary air duct is formed between two adjacent fire bars, the fire bars are arranged above the second ventilation opening, and the secondary air duct is communicated with the second ventilation opening.

[0021] In one embodiment of the present application, the bottom of the shell forms a bent surface, and the bent surface matches the lower contour of the fire bar; the second vent is opened on the bent surface;

[0022] An extension portion extending downward is formed at the bottom of the fire bar, and the induced section is formed on the extension portion;

[0023] A first overlapping portion is formed between the end of the fire bar away from the ejection port of the ejection section and the extension portion;

[0024] The bending surface comprises a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the second vent comprises a first sub-vent and a second sub-vent, the first sub-vent is formed on the first mounting surface, and the second sub-vent is formed on the second mounting surface;

[0025] The first overlapping portion is arranged above the first mounting surface, and the extending portion is arranged above the second mounting surface.

[0026] In one embodiment of the present application, a second overlapping portion is formed between the end of the fire row adjacent to the ejection port of the ejection section and the extension portion;

[0027] The second mounting plate has a third mounting surface, the third mounting surface is higher than the second mounting surface, and the second mounting surface is located between the first mounting surface and the third mounting surface;

[0028] The second vent includes a third sub-vent, and the third sub-vent is formed on the third mounting surface;

[0029] Wherein, the second overlapping portion is arranged above the third mounting surface.

[0030] In one embodiment of the present application, the base plate forms a step structure between the first mounting surface and the second mounting surface, and the vertically arranged mounting slots are provided on the edges and corners of the step structure.

[0031] On the other hand, an embodiment of the present application further provides a gas water heater, comprising a casing and the above-mentioned burner, wherein the burner is located in the casing.

[0032] By arranging positioning ribs around the first vent on the enclosure, the positioning ribs can be connected to the injection port of the fire grate to position and install one end of the fire grate, and a mounting slot is provided on the bottom plate for mounting the fire grate. The fire grate will be fixedly assembled between the mounting slot and the positioning ribs, and there is no need to additionally configure a combustion rack, thereby reducing the use of parts and components, reducing the high manufacturing cost of the gas water heater and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 One of the schematic diagrams of the structure of the utility model burner embodiment;

[0035] Figure 2 The utility model is a schematic diagram of the structure of the burner embodiment of the second;

[0036] Figure 3 The utility model is a schematic diagram of the structure of the burner embodiment of the third;

[0037] Figure 4 for Figure 1 A schematic diagram of the structure of the first mounting plate;

[0038] Figure 5 for Figure 1 A schematic diagram of the structure of the second mounting plate;

[0039] Figure 6 for Figure 1 Schematic diagram of the structure of the middle lining plate;

[0040] Figure 7 This is one of the assembly diagrams of the fire grate and the housing in the burner embodiment of the utility model;

[0041] Figure 8 The utility model burner embodiment of the fire grate and the housing assembly diagram of the second;

[0042] Fig. 9 One of the structural diagrams of an embodiment of the utility model fire row;

[0043] Fig.10 A schematic diagram of the structure of the utility model fire row of an embodiment of the second;

[0044] Fig.11 A cross-sectional view of an embodiment of the utility model fire row;

[0045] Fig.12 A schematic diagram of the structure of the utility model fire row of an embodiment of the third;

[0046] Fig.13 for Fig.12 A partial enlarged schematic diagram of area A in the middle. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0052] A gas water heater is a water heater that uses gas as the main energy material and transfers the high-temperature heat generated by gas combustion to cold water flowing through a heat exchanger to prepare hot water.

[0053] A gas water heater generally comprises a shell, and components such as a burner, a heat exchanger, a fan and a fan cover arranged in the shell.

[0054] The gas is transported to the burner and ignited by an ignition device, so that the burner burns the transported gas to generate heat.

[0055] A heat exchange tube is arranged in the heat exchanger, one end of the heat exchange tube is connected to the water supply pipeline, and the other end of the heat exchange tube is connected to a shower head or a faucet.

[0056] The heat generated by the burner burning gas is used to heat the heat exchange tubes, so that the water temperature in the heat exchange tubes is increased to form hot water.

[0057] When the gas water heater is working, cold water provided by the water supply pipeline flows into the heat exchange tube, and then is heated into hot water by the heating source generated by the burner, and then flows out from the shower or faucet through the hot water valve for user use.

[0058] At the same time, when the gas water heater is working, the fan is powered on and runs at the same time. Under the action of the fan, the smoke generated by the burner is discharged to the outside.

[0059] like Figure 1-Figure 8 As shown, an embodiment of the present application provides a burner, comprising: a shell 2 and a plurality of fire bars 1, wherein the plurality of fire bars 1 are arranged side by side and disposed in the shell 2, and the fire bars 1 have an induced draft section to introduce fuel gas and primary air for combustion.

[0060] Embodiment 1: In order to improve the uniform distribution of the secondary air of the fire grate 1 and ensure that the gas and air at each position of the fire grate 1 are evenly mixed to improve the completeness of gas combustion, the following structural improvements are made to the outer shell 2 and the fire grate 1.

[0061] A side wall of the housing 2 is provided with a plurality of first vents 201, the plurality of first vents 201 are arranged side by side, and a lower portion of the housing 2 is further provided with at least one second vent 202;

[0062] A secondary air duct is formed between two adjacent fire bars 1 , the induced section of the fire bar 1 is connected to the corresponding first ventilation opening 201 , the fire bar 1 is arranged above the second ventilation opening 202 , and the secondary air duct is connected to the second ventilation opening 202 .

[0063] Specifically, after the fire grate 1 is installed in the shell 2, the ejection port of the ejection section of the fire grate 1 is connected to the first vent 201 on the shell 2, and the gas mixed with the primary air enters the ejection port through the first vent. After the gas and the primary air are mixed in the fire grate 1 and output from the air outlet of the fire grate 1 and ignited, the secondary air is introduced into the shell 2 through the second vent 202 set at the bottom of the shell 2. In addition, since the second vent 202 is arranged at the bottom of the shell 2, it is convenient to design the opening according to the demand for secondary air at different positions of the fire grate 1, so as to ensure that the secondary air can be more evenly distributed at the air outlets at various positions of the fire grate 1, thereby achieving full mixing of the gas and the secondary air and improving the combustion efficiency.

[0064] After the secondary air enters the housing 2 through the second ventilation opening 202 , it enters the secondary air duct formed between the fire bars 1 , and the secondary air flows along the secondary air duct to the air outlet of the fire bar 1 .

[0065] In some embodiments, the bottom of the shell 2 forms a bending surface, and the bending surface matches the lower contour of the fire bar 1; the second ventilation opening 202 is opened on the bending surface.

[0066] Specifically, for the fire bar 1, the top thereof is usually relatively flat due to the configuration of the air outlet holes, while the bottom of the fire bar 1 has a height difference due to the profile design. Therefore, in order to ensure that the airflow entering the housing 2 through different second vents 202 can quickly enter the corresponding part of the secondary air duct, the bottom of the housing 2 is designed as a bent surface so that the bent surface matches the bottom contour of the fire bar 1, thereby reducing the formation of a large spacing space at the bottom of the fire bar 1 and affecting the air intake of the secondary air duct.

[0067] In one embodiment, the bottom of the fire bar 1 forms an extension portion 101 extending downward, and the extension portion 101 is formed with the introduction section;

[0068] A first overlapping portion 102 is formed between the end of the fire bar 1 away from the injection port of the injection section and the extension portion 101;

[0069] The bending surface has a first mounting surface 203 and a second mounting surface 204, the first mounting surface 203 is higher than the second mounting surface 204, the second vent 202 includes a first sub-vent 2021 and a second sub-vent 2022, the first sub-vent 2021 is formed on the first mounting surface 203, and the second sub-vent 2022 is formed on the second mounting surface 204;

[0070] The first overlapping portion 102 is arranged above the first mounting surface 203 , and the extending portion 101 is arranged above the second mounting surface 204 .

[0071] Specifically, in order to meet the structural design requirements of the press-formed structure, the fire bar 1 is provided with an extension portion 101 at its bottom to form an introduction section. At this time, the end of the fire bar 1 away from the introduction port facilitates the generation of a height difference between the extension portions 101 to form a first overlap portion 102. In order to ensure the air intake, the portion of the secondary air duct in the area between the two first overlap portions 102 of two adjacent fire bars 1 can be formed with a first mounting surface 203 formed on the bent surface to fit tightly against the bottom of the first overlap portion 102. In this way, the installation requirements can be met, and the secondary air introduced by the first sub-air port 2021 on the first mounting surface 203 can directly enter the secondary air duct where the first overlap portion 102 is located to ensure sufficient secondary air supply.

[0072] In another embodiment, a second overlapping portion 103 is formed between the end of the fire bar 1 adjacent to the injection port of the injection section and the extension portion 101;

[0073] The second mounting plate 22 has a third mounting surface 205, the third mounting surface 205 is higher than the second mounting surface 204, and the second mounting surface 204 is located between the first mounting surface 203 and the third mounting surface 205;

[0074] The second vent 202 includes a third sub-vent 2023, and the third sub-vent 2023 is formed on the third mounting surface 205;

[0075] The second overlapping portion is arranged above the third mounting surface 205 .

[0076] Specifically, a second overlap portion 103 is formed corresponding to the end of the fire bar 1 close to the introduction section for installation, and the second overlap portion 103 is overlapped on the third installation surface 205. At the same time, in order to meet the requirement of sufficient secondary air supply at the second overlap portion 103, a third sub-air port 2023 is also provided on the third installation surface 205 of the secondary air duct. The third sub-air port 2023 is adjacent to the bottom of the second overlap portion 103, so that the secondary air introduced by the third sub-air port 2023 can directly enter the secondary air duct. In this way, sufficient secondary air supply can be obtained at each position of the fire bar 1 to improve the mixing uniformity of gas and air, thereby improving the combustion sufficiency of gas.

[0077] In some embodiments, a plurality of first sub-air vents 2021 arranged side by side are provided on the first mounting surface 203, so that secondary air is evenly distributed at the bottom of each fire bar 1 through the plurality of first sub-air vents 2021. The first sub-air vents 2021 may also be designed as strip holes, extending along the length direction of the fire bar 1 and located on one side of the fire bar 1.

[0078] In some embodiments, the second mounting surface 204 is provided with a plurality of second sub-air vents 2022 arranged side by side, the second sub-air vents 2022 are strip-shaped holes, and the second sub-air vents 2022 extend along the length direction of the fire bar 1. Specifically, there may be a plurality of second sub-air vents 2022, and the second sub-air vents 2022 also extend along the length direction of the fire bar 1.

[0079] Alternatively, the second mounting surface 204 is provided with at least one second sub-air port 2022, and the second sub-air port 2022 extends in a length direction perpendicular to the fire bar 1. Specifically, there can be one second sub-air port 2022 and it occupies enough space on the second mounting surface 204 to meet the secondary air intake requirements within a large area of ​​the bottom of multiple rows of fire bars 1.

[0080] In some embodiments, the third mounting surface 205 is provided with a plurality of third sub-air ports 2023 arranged side by side, so as to supply secondary air evenly distributed at the bottom of each fire bar 1 through the plurality of third sub-air ports 2023. The third sub-air ports 2023 may also be designed as strip holes, and the third sub-air ports 2023 extend along the length direction of the fire bar 1.

[0081] By setting a second vent 202 at the bottom of the shell 2, the second vent 202 is arranged at the bottom of the fire grate 1 and can be distributed according to the requirements of secondary ventilation. Therefore, during use, it can ensure that the secondary air at different positions of the fire grate 1 is evenly distributed, so as to improve the uniformity of mixing of gas and air and improve the completeness of gas combustion.

[0082] Embodiment 2, as Figure 1-Figure 8 As shown, for the fire bar 1, it is necessary to assemble multiple fire bars 1 into the shell 2 in sequence side by side. In order to reduce the use of parts, reduce manufacturing costs and improve assembly efficiency, the following structural improvements are made to the shell 2 and the fire bar 1.

[0083] The housing 2 includes an enclosure and a bottom plate 23. A plurality of first vents 201 are provided on one side wall of the enclosure. Positioning ribs 206 are provided on the inner surface of the enclosure around the periphery of the first vents 201. The bottom plate 23 is provided at the bottom of the enclosure. A plurality of mounting slots 207 are provided on the bottom plate 23. The mounting slots 207 are arranged opposite to the corresponding positioning ribs 206.

[0084] A plurality of fire bars 1 are arranged side by side and set in the housing 2 , the ejection ports of the ejection sections of the fire bars 1 are connected to the corresponding positioning ribs 206 , and the fire bars 1 are also stuck in the corresponding mounting slots 207 .

[0085] The positioning rib 206 is a ring-shaped structure, and the positioning rib 206 is inserted into the injection port.

[0086] Specifically, during the assembly process, the ejection ports of multiple fire bars 1 are connected together with the positioning ribs 206 to position the ejection ports of the fire bars 1 through the positioning ribs 206, and then the ends of the fire bars 1 away from the positioning ribs 206 are clamped in the positioning slots 208. In this way, the fire bars 1 can be installed using only the assembly structure in the outer shell 2, and there is no need to additionally configure an independent mounting frame to install the fire bars 1, thereby reducing the number of parts and improving assembly efficiency.

[0087] In some embodiments, the enclosure includes a first mounting plate 21 and a second mounting plate 22, the cross section of the first mounting plate 21 is a U-shaped structure, the second mounting plate 22 is connected between two ends of the first mounting plate 21, and the bottom plate 23 is arranged at the bottom of the second mounting plate 22;

[0088] The first vent 201 and the positioning rib 206 are disposed on the second mounting plate 22 .

[0089] Specifically, the enclosure is a split structure, the first mounting plate 21 is a semi-enclosed structure, and the second mounting plate 22 is provided with a first vent 201 to meet the intake requirements of the fuel gas and primary air.

[0090] In another embodiment, the housing 2 further comprises an inner lining plate 24, and the inner lining plate 24 is disposed on the inner wall of the first mounting plate 21 and arranged outside the fire bar 1;

[0091] A positioning portion extending toward the second mounting plate 22 is provided on the inner lining plate 24 at a position opposite to the second mounting plate 22, and a plurality of positioning slots 208 are provided at the edge of the positioning portion;

[0092] The fire bar 1 is clamped in the corresponding positioning slot 208 .

[0093] Specifically, in order to reduce the heat transfer from the outer shell 2 to the outside when the fire grate 1 is burning, an inner lining plate 24 is provided in the outer shell 2 for heat insulation, and an air layer is formed between the inner lining plate 24 and the outer shell 2 to play a role of heat insulation.

[0094] Furthermore, by further providing a positioning slot 208 on the inner lining plate 24 , the positioning slot 208 can position the end of the fire bar 1 away from the injection port, thereby more effectively improving the installation accuracy and reliability of the fire bar 1 .

[0095] In some embodiments, in order to facilitate the installation of the inner lining plate 24 on the outer shell 2, a positioning tongue 211 extending inward and upward is further provided on the first mounting plate 21, and the lower edge of the inner lining plate 24 is clamped between the positioning tongue 211 and the first mounting plate 21.

[0096] Specifically, when installing the inner lining plate 24, the inner lining plate 24 is placed on the inner side of the first mounting plate 21 and pre-positioned and supported by the positioning tongue 211, and then the upper part of the inner lining plate 24 can be fixedly connected to the first mounting plate 21 by reducing screws.

[0097] In another embodiment, the positioning rib 206 , the installation slot 207 and the positioning slot 208 connected and matched with the same fire bar 1 are arranged in sequence.

[0098] Specifically, after the fire bar 1 is assembled in place, the two ends of the fire bar 1 will be limited and fixed by the positioning ribs 206 and the positioning slots 208, and the bottom of the fire bar 1 can be further supported and fixed by the installation slots 207, so that the fire bar 1 can be securely assembled into the shell 2.

[0099] The positioning slot 208 is arranged obliquely above the installation slot 207 .

[0100] In another embodiment, a second ventilation opening 202 is disposed on the bottom plate 23 to meet the supply requirement of secondary air through the second ventilation opening 202 .

[0101] Embodiment three, as Figure 9-13 As shown, based on the above-mentioned embodiments 1 and 2, optionally, the following structural improvements are made to the fire bar.

[0102] The bottom of the fire bar 1 is provided with an introduction section 11, a mixing section 12 and a diffuser section 16, and the top of the fire bar 1 is provided with an air outlet cavity 13, and the introduction section 11 is connected with the air outlet cavity 13 through the mixing section 12 and the diffuser section 16. The fire bar 1 is also provided with an air suction hole 14, which is connected with the mixing section 12 and arranged close to the introduction section 11. The inner wall of the mixing section 12 is also provided with a guide plate 15, and the guide plate 15 is arranged on one side of the air suction hole 14;

[0103] The guide plate 15 is configured to guide the gas outside the fire bar into the mixing section 12 and guide it to form a spiral airflow.

[0104] Specifically, the injection section 11 provided at the bottom of the fire grate 1 is used to inject gas and primary air into the fire grate 1 . After the gas and primary air enter the fire grate 1 through the injection section 11 , the gas and primary air are mixed and transported to the mixing section 12 .

[0105] Since the mixing section 12 is provided with an air intake hole 14, and the mixing section 12 is provided with a guide plate 15 on its inner wall to match the air intake hole 14, the mixed air flow formed by the fuel gas and the primary air flows through the guide plate 15. Since the guide plate 15 protrudes from the inner wall of the mixing section 12 and is arranged on the inner side of the air intake hole 14, there is a speed difference between the high-speed flowing mixed gas in the mixing section 12 and the gas near the air intake hole 14 on the outer side of the fire grate 1. Due to the pressure difference caused by the speed difference, the gas near the air intake hole 14 is sucked into the mixing section 12 of the fire grate 1, and a spiral airflow is formed under the guidance of the guide plate 15, thereby further improving the uniformity of the mixing of the fuel gas and the air.

[0106] During actual use, when the gas outside the fire grate 1 enters the mixing section 12 of the fire grate 1 through the side air intake holes 14, due to the speed difference with the gas in the mixing section 12, shear force is generated, thereby forming a small vortex at the air intake holes, which can promote the mixing of gas and air and effectively prevent the mixed gas from leaking out of the air intake holes.

[0107] The flue gas generated by combustion can enter the fire grate through the air intake port and mix with the fuel gas and primary air. After the flue gas enters the fire grate 1, the oxygen content of the mixed gas in the mixing section 12 can be reduced, thereby reducing the combustion temperature and the content of thermal nitrogen oxides.

[0108] Thermal nitrogen oxides are generated by the reaction of nitrogen and oxygen in a high temperature environment, and the higher the temperature, the more thermal nitrogen oxides are generated. Therefore, reducing the oxygen content and the combustion temperature can effectively reduce the generation of thermal nitrogen oxides. Therefore, the flue gas recirculation in the combustion chamber through the air intake hole 14 can effectively reduce the nitrogen oxide content in the flue gas and achieve low nitrogen emissions.

[0109] The fire grate 1 provided in the present application can improve the uniformity of the mixing of gas and air in the fire grate 1, adjust the ratio of primary and secondary air, and reduce the nitrogen oxide content of the flue gas. The fire grate 1 is provided with air intake holes 14 and guide plates 15.

[0110] In addition, part of the secondary air can enter the fire grate 1 through the air intake holes 14 and the guide plate 15 and become primary air, thus providing a new method for adjusting the ratio of primary and secondary air.

[0111] Furthermore, part of the flue gas can also enter the fire grate 1 through the air intake holes 14 and the guide plate 15 to achieve flue gas recirculation, reduce oxygen concentration, reduce combustion temperature, and reduce nitrogen oxide content. Therefore, by setting the air intake holes 14 and the guide plate 15, the three problems of improving the uniformity of mixing gas and air in the fire grate 1, adjusting the ratio of primary and secondary air, and reducing the nitrogen oxide content of flue gas can be achieved at the same time. It is simple and feasible, with significant effects, and can effectively improve the working performance of the gas water heater and effectively reduce the pollutant content.

[0112] In one embodiment of the present application, the air intake holes 14 are formed on the fire bar 1 by stamping, and the portion of the fire bar 1 that is stamped into the mixing section 12 forms the guide plate 15 .

[0113] Specifically, in order to facilitate the formation of the air intake holes 14 and the guide plate 15 on the fire grate 1, since the fire grate 1 is generally made of sheet metal, when processing the fire grate 1, the air intake holes 14 can be punched out on the sheet metal by stamping, and the protruding portion of the air intake holes 14 formed by the punching forms the guide plate 15.

[0114] In one embodiment of the present application, the fixed end of the guide plate 15 is fixedly connected to the fire bar 1 , and the free end of the guide plate 15 extends obliquely in a direction away from the air intake hole 14 .

[0115] Specifically, due to the speed difference between the high-speed airflow in the mixing section and the gas outside the air suction hole 14, a pressure difference is formed at the air suction hole 14 to suck the gas outside the fire row. Since the guide plate 15 is in a tilted structure on the inner wall of the mixing section 12, the guide plate 15 guides the gas outside the fire row to enter the mixing section 12 of the fire row through the air suction hole 14 and guides it to form a spiral airflow.

[0116] In one embodiment of the present application, the fixed end of the guide plate 15 is close to the ejection section 11 , and the free end of the guide plate 15 extends in a direction away from the ejection section 11 .

[0117] Specifically, in order to guide the airflow entering the mixing section 12 through the guide plate 15, the fixed end of the guide plate 15 is close to the ejection section 11, so that the airflow entering the mixing section 12 flows from the fixed end of the guide plate 15 along the surface of the guide plate 15.

[0118] There are at least three reasons to prevent the mixed gas from leaking out: first, it is blocked by the guide plate; second, it is to use the pressure difference caused by the speed difference between the high-speed airflow in the mixing section 12 and the gas outside the air intake hole 14; third, it is a small vortex near the air intake hole 14. In this way, the mixed gas flow in the mixing section 12 can be more effectively blocked from overflowing.

[0119] In one embodiment of the present application, the air intake holes 14 are strip-shaped holes, and the air intake holes 14 are arranged obliquely along the air flow direction in the mixing section 12 .

[0120] Specifically, there is a speed difference between the high-speed mixed gas flowing in the mixing section 12 and the gas near the air intake holes 14 outside the fire grate 1, resulting in a pressure difference at the air intake holes, which sucks the gas near the air intake holes 14 outside the fire grate 1 into the mixing section 12 of the fire grate 1.

[0121] Since the air intake holes are arranged obliquely relative to the mixed air flow flowing in the mixing section, the gas entering the mixing section flows obliquely relative to the mixed air flow via the guide plate, thus forming a spiral air flow in the mixing section. The spiral air flow can promote full mixing of the gas and air, and improve the mixing uniformity of the gas and air at the fire holes of the fire grate 1 and the flame stability.

[0122] In one embodiment of the present application, the air intake holes 14 and the guide plates 15 arranged on one side of the fire bar 1 extend upwardly and obliquely along the air flow direction in the mixing section 12, and the air intake holes 14 and the guide plates 15 arranged on the other side of the fire bar 1 extend downwardly and obliquely along the air flow direction in the mixing section 12.

[0123] Specifically, air suction holes 14 and guide plates 15 are respectively provided on the mixing section 12 on both sides of the fire bar 1, and the air suction holes 14 and guide plates 15 distributed on both sides have opposite inclined extension directions.

[0124] After the gas outside the fire grate 1 is sucked into the mixing section of the fire grate 1 by the air intake holes on both sides, the gas inhaled on both sides flows in opposite directions in the mixing section (refer to Fig.13 The arrow in the figure indicates the flow direction of the gas entering the mixing section), thereby causing the mixed gas in the mixing section to flow in a spiral as a whole, thereby ensuring the mixing uniformity of the gas and air to the greatest extent possible.

[0125] That is, the guide plates 15 located on both sides of the mixing section 12 can guide the gas outside the fire exhaust to be sucked into the mixing section 12 through the suction holes 14, and the sucked gas is mixed with the airflow input from the introduction section 11 to the mixing section 12 in the mixing section 12 and forms a spiral airflow in a spiral conveying manner.

[0126] In one embodiment of the present application, a plurality of air intake holes 14 are arranged side by side on the fire bar 1 along the air flow direction in the mixing section 12 .

[0127] In one embodiment of the present application, a plurality of air intake holes 14 are arranged in parallel on the fire bar 1 along a direction perpendicular to the air flow direction in the mixing section 12 .

[0128] In one embodiment of the present application, a plurality of air intake holes 14 are arranged in an array on the fire bar 1 .

[0129] In another embodiment of the present application, the tilting angle of the tilted guide plate 15 in the mixing section 12 can be adjusted accordingly as needed, and is not limited here.

[0130] In another embodiment of the present application, the fire bar may be only provided with the introduction section 11 and the diffuser section 16, that is, the introduction section 11 is connected to the diffuser section 16. Correspondingly, the air intake hole 14 and the guide plate 15 are formed on the diffuser section 16, and the guide plate 15 is configured to guide the gas outside the fire bar to enter the diffuser section 16 and guide to form a spiral airflow.

[0131] The airflow pattern of the air intake holes 14 and the guide plates 15 arranged on the diffuser section 16 is similar to the airflow pattern of the air intake holes 14 and the guide plates 15 arranged on the mixing section in the above embodiment, and will not be described in detail here.

[0132] On the other hand, an embodiment of the present application further provides a gas water heater, including: the burner in the above embodiment.

[0133] Specifically, the gas water heater generally includes a casing and a heat exchanger and a burner arranged in the casing. Among them, a corresponding fan is also required in the casing to drive air into the burner, and at the same time, the fan is used to drive the smoke in the combustion chamber to be discharged to the outside.

[0134] The fire grate 1 is provided with an air intake hole 14 connected to the mixing section 12 or the diffuser section 16. Taking the mixing section 12 configured with an air intake hole and a guide plate as an example, during use, there is a speed difference between the high-speed mixed gas in the mixing section 12 and the gas near the air intake hole 14 outside the fire grate 1. Due to the pressure difference caused by the speed difference, the gas near the air intake hole 14 is sucked into the mixing section 12 of the fire grate 1, and a spiral airflow is formed under the guidance of the guide plate 15.

[0135] In this way, the gas outside the fire grate 1 can be further sucked into the mixing section 12 to increase the amount of air mixed with the gas, and the airflow in the mixing section 12 can be more evenly mixed with the gas under the guiding effect of the guide plate 15. The evenly mixed airflow enters the gas outlet cavity 13 and finally burns to release heat. Since the mixed gas in the gas outlet cavity 13 is mixed more evenly, the flame of the fire grate 1 is evenly distributed, thereby improving the uniformity of the mixing of gas and air in the burner fire grate to improve the completeness of gas combustion.

[0136] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A burner, characterized in that: include: The outer shell comprises an enclosure and a bottom plate, a plurality of first vents are arranged on one side wall of the enclosure, and positioning ribs are arranged on the inner surface of the enclosure around the outer periphery of the first vents; the bottom plate is arranged at the bottom of the enclosure, and a plurality of mounting slots are arranged on the bottom plate, and the mounting slots are arranged opposite to the corresponding positioning ribs; A plurality of fire bars are arranged side by side and disposed in the shell, the ejection ports of the ejection sections of the fire bars are connected to the corresponding positioning ribs, and the fire bars are also stuck in the corresponding mounting slots.

2. The burner according to claim 1, characterized in that The enclosure includes a first mounting plate and a second mounting plate, the cross section of the first mounting plate is a U-shaped structure, the second mounting plate is connected between two ends of the first mounting plate, and the bottom plate is arranged at the bottom of the second mounting plate; Wherein, the second mounting plate is provided with the first vent and the positioning rib.

3. The burner according to claim 2, characterized in that: The housing further comprises an inner lining plate, which is disposed on an inner wall of the first mounting plate and arranged outside the fire bar; A positioning portion extending toward the second mounting plate is provided on the inner lining plate at a position opposite to the second mounting plate, and a plurality of positioning slots are provided at an edge of the positioning portion; Wherein, the fire bar is clamped in the corresponding positioning slot.

4. The burner according to claim 3, characterized in that The first mounting plate is also provided with a positioning tongue extending inwardly and upwardly, and the lower edge of the lining plate is clamped between the positioning tongue and the first mounting plate.

5. The burner according to claim 3, characterized in that The positioning ribs, the installation slots and the positioning slots connected and matched with the same fire bar are arranged in sequence; And / or, the positioning slot is arranged obliquely above the installation slot.

6. The burner according to any one of claims 2 to 5, characterized in that: The bottom plate is provided with at least one second vent; A secondary air duct is formed between two adjacent fire bars, the fire bars are arranged above the second ventilation opening, and the secondary air duct is communicated with the second ventilation opening.

7. The burner according to claim 6, characterized in that The bottom of the shell forms a bent surface, and the bent surface matches the lower contour of the fire bar; the second vent is formed on the bent surface; An extension portion extending downward is formed at the bottom of the fire bar, and the induced section is formed on the extension portion; A first overlapping portion is formed between the end of the fire bar away from the ejection port of the ejection section and the extension portion; The bending surface comprises a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the second vent comprises a first sub-vent and a second sub-vent, the first sub-vent is formed on the first mounting surface, and the second sub-vent is formed on the second mounting surface; Wherein, the first overlapping portion is arranged above the first mounting surface, and the extending portion is arranged above the second mounting surface.

8. The burner according to claim 7, characterized in that A second overlapping portion is formed between the end of the fire row adjacent to the injection port of the injection section and the extension portion; The second mounting plate has a third mounting surface, the third mounting surface is higher than the second mounting surface, and the second mounting surface is located between the first mounting surface and the third mounting surface; The second vent includes a third sub-vent, and the third sub-vent is formed on the third mounting surface; Wherein, the second overlapping portion is arranged above the third mounting surface.

9. The burner according to claim 7, characterized in that The bottom plate forms a step structure between the first mounting surface and the second mounting surface, and the corners of the step structure are provided with the vertically arranged mounting slots.

10. A gas water heater, comprising a casing, characterized in that: It also includes a burner as described in any one of claims 1 to 9, wherein the burner is located in the casing.

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