Burners, burners and gas water heaters

Abstract

This invention relates to the field of water heater technology, providing a burner, a burner having the burner, and a gas water heater. The burner has a gas outlet at its top, and the interior of the gas outlet has a hollow gas outlet chamber. The top of the gas outlet has a main gas outlet for discharging gas from the gas outlet chamber. The interior of the burner has a hollow gas flow channel, one end of which forms a gas inlet, and the other end extends to the gas outlet and communicates with the gas outlet chamber. At least one side of the gas outlet also has a flame stabilizer for discharging gas from the gas outlet chamber. The diameter of the flame stabilizer is smaller than the diameter of the main gas outlet, and vertically, the flame stabilizer is configured to be lower than the main gas outlet to improve the stability of the flame formed during burner operation.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and more specifically to water heaters that heat water by burning gas. Background Technology

[0002] In gas water heaters (such as the gas water heater disclosed in publication number CN224246454U), the burner and heat exchanger together constitute a combustion heat exchange system. The burner receives gas and outside air, ignites them to form a flame, and this flame heats the heat exchanger, thereby heating the water flowing through the heat exchanger. However, some existing gas water heaters are prone to flame instability during use, which affects the overall heating effect. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a firebox that can improve flame stability.

[0004] Burners and gas water heaters with the aforementioned burners are also provided to improve heating efficiency.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention proposes a burner with a gas outlet at the top, the interior of which is hollow and forms a gas outlet chamber, and the top of the gas outlet is provided with a main gas outlet for discharging gas from the gas outlet chamber.

[0007] The burner has a hollow cavity inside which a gas flow channel is formed. One end of the burner forms a gas inlet, and the other end extends to the gas outlet and is connected to the gas outlet chamber.

[0008] At least one side of the gas outlet is also provided with a flame stabilizer for discharging gas from the gas outlet chamber.

[0009] The diameter of the flame stabilizer is smaller than that of the main gas outlet, and vertically, the flame stabilizer is configured to be lower than the main gas outlet.

[0010] By setting a flame stabilizing port with a smaller diameter than the main gas outlet and a lower vertical position on the side of the gas outlet, a composite flame structure with a combination of high and low flames and coordinated flame sizes can be formed when the burner is working. Among them, the lower-positioned, smaller-diameter flame stabilizing port can form a stable base flame that is not easily blown out (the smaller diameter is more conducive to maintaining a lower and more stable gas flow). When the flame at the main gas outlet tends to be blown up or away due to load changes, airflow disturbances, etc., the flame at the lower and more stable flame stabilizing port below it can hold the main flame like an "anchor" through thermal radiation and other effects, preventing it from leaving the flame. The stable combustion zone above the main gas outlet can also provide a stable thermal environment for the flame stabilizing port, further suppressing the backfire tendency of the flame stabilizing port, thereby improving the overall flame stability and optimizing the heating effect and operational safety of the burner.

[0011] In some implementations, flame stabilizers are provided on both sides of the exhaust end. The dual-sided arrangement of the flame stabilizer structure makes the stabilized flames generated from both sides of the firebox more symmetrical and balanced, and can jointly form a stable and symmetrical "anchoring" effect on the main flame in the middle from both sides, thereby significantly improving the overall stability of the flame.

[0012] In some embodiments, the flame deflector further includes a flame deflector positioned outside the exhaust end, which, in the lateral direction, covers at least the bottom portion of the flame deflector from the outside. This guides the flame upwards, enhancing the stability of the flame deflector itself and its auxiliary and stabilizing effect on the main flame.

[0013] Furthermore, in some embodiments, in the lateral direction, the flame deflector has a portion that completely covers the flame deflector from the outside of the flame deflector, and this portion is spaced apart from the outlet end to define a flame guide channel with an open upper end between the two.

[0014] The flame guide channel is connected to the flame stabilizer.

[0015] By adding a flame deflector and flame guide channels, a protected and well-directed combustion space is provided for the flame ejected from the flame stabilizer. The flame deflector isolates lateral interference and concentrates the flame, while the open flame guide channel at the top guides the flame upward (to the main flame area) for stable propagation. This enhances the stability of the flame stabilizer itself and its auxiliary and stabilizing effect on the main flame, making the flame structure more reliable.

[0016] Furthermore, in some embodiments, the diameter of the flame guide channel gradually increases from bottom to top.

[0017] It can reduce the resistance to flame rise, allowing the flame generated by the flame stabilizer to spread and supplement the main flame area above more smoothly and stably, further optimizing the flame guidance and flame stabilization effect.

[0018] In some embodiments, the gas flow path includes:

[0019] The intake air passage section has a gas inlet at one end and an upward-facing convection outlet at the other end.

[0020] The upper end of the air outlet section is connected to the air outlet chamber, and the lower end is connected to the convection port.

[0021] The gas outlet section has a portion that is opposite to and above the convection port, and the sidewall of this portion has a flow-blocking portion that protrudes into the gas flow channel.

[0022] On the one hand, it can further disperse the airflow and promote the full and uniform mixing of the combustion gas and primary air, thereby ensuring better consistency of the mixed gas concentration ejected from the main combustion gas outlet and the flame stabilizer. On the other hand, when the mixed gas is concentrated and ejected from the convection port and impacts upward, it first hits the "flow-blocking section", which disperses and divides a concentrated, high-speed airflow into multiple finer, slower streams. Under the guidance and turbulence of the flow-blocking section, the dispersed airflow diffuses more evenly in all directions, thereby improving the uniformity and stability of the entire flame.

[0023] Furthermore, in some embodiments, the flow obstruction portion is provided with a plurality of protrusions that protrude into the gas flow channel;

[0024] Several convex hulls are arranged at intervals in the horizontal direction.

[0025] A series of dispersed, point-like turbulence elements are set in the airflow channel, which can effectively disperse and cut the concentrated main airflow, causing it to flow in multiple directions. This directs the airflow energy from the central area to both sides, promoting the uniform filling of the gas in the cross-section of the entire outlet airflow channel section, thereby providing a more consistent gas supply in terms of pressure and flow to each upstream flame outlet.

[0026] The present invention also proposes a burner comprising the burner described in any of the above embodiments.

[0027] The present invention also proposes a gas water heater, comprising:

[0028] The burner described in the above embodiments has a secondary air inlet for air to flow into the combustion chamber, and each gas inlet is connected to a primary air inlet, and the main gas outlet and the flame stabilizer are both connected to the combustion chamber.

[0029] A gas circuit assembly for connection to a gas pipeline and having a gas output end having a plurality of nozzles for ejecting gas.

[0030] Several plates are arranged around the burner, which together with the burner form an air inlet chamber, and both the primary air inlet and the secondary air inlet are connected to the air inlet chamber;

[0031] One side wall of the intake chamber has an air inlet for external air to enter the intake chamber;

[0032] The gas output end is inserted and fixed in the air intake chamber, and each nozzle is aligned with a primary air intake port for gas connection.

[0033] Several primary air inlets are configured such that the opening diameter is smaller the closer it is to the air inlet.

[0034] On the one hand, by forming a relatively closed air intake chamber through the plates surrounding the burner, the gas output end (including the nozzle) is protected in the chamber; it can effectively isolate external airflow disturbances, provide a stable environment for gas injection, and ensure that the gas can be continuously and stably injected into the corresponding primary air intake, so as to form a more stable heating flame during operation and improve the heating effect.

[0035] On the other hand, considering the arrangement of the air intake chamber, uneven aerodynamic field distribution can easily occur (high dynamic pressure and fast flow velocity near the air inlet, resulting in excess air; lack of air at the far air inlet), leading to uneven flame combustion during operation. This invention sets the orifice diameters of several primary air inlets connecting the air intake chamber in a gradient distribution, where "the closer to the air inlet, the smaller the orifice diameter," thereby balancing the amount of air drawn from the air intake chamber to each flow channel. Specifically, by setting a smaller orifice diameter for the near-end (closer to the air inlet) flow channel, the local resistance to air inflow is increased, thus limiting and reducing the intake of excess air; by setting a larger orifice diameter for the far-end (far from the air inlet) flow channel, the flow resistance is reduced, thereby promoting and increasing the intake of air, compensating for the static pressure differences caused by different locations, and making the airflow rate drawn from the air intake chamber in all combustion channels tend to be consistent, thus better ensuring that each combustion unit obtains a similar proportion of fuel-air mixture, achieving more uniform and complete combustion overall.

[0036] By combining two aspects, the following is achieved: the intake chamber optimizes the stability of gas injection (making the gas supply more stable), and the gradient aperture primary intake port optimizes the overall uniformity of air and gas mixing in each gas flow channel, making the overall combustion more complete and uniform, and achieving better heating effect.

[0037] In some embodiments, the primary air inlet is located on the side wall of the burner, and the secondary air inlet is located on the bottom wall of the burner;

[0038] The air inlet is located on the bottom wall of the air intake chamber and is vertically aligned with the secondary air inlet.

[0039] By placing the primary air inlet on the burner sidewall, and aligning the secondary air inlet and the air inlet of the intake chamber at the bottom vertically, the flow path of external air entering the intake chamber from the air inlet naturally splits: part of the air flows directly upwards and smoothly enters the secondary air inlet at the bottom for use in the combustion chamber; the other part of the air must flow towards the sidewall to enter the primary air inlet. Because the primary air inlet is located on the sidewall, the airflow direction needs to change from vertical to horizontal (or inclined). This "bending" process itself buffers the airflow, making the airflow near the primary air inlet relatively gentle. This reduces the air velocity and dynamic pressure rushing towards the primary air inlet, minimizing the direct impact and interference of the intake airflow on the gas jet ejected from the nozzle, improving the stability of the gas supply, and allowing for more stable mixing of gas and air within the gas flow channel.

[0040] Furthermore, in some embodiments, the bottom of the burner is connected to an air inlet baffle that covers the secondary air inlet;

[0041] The air inlet baffle is provided with several secondary air inlets for air in the air inlet chamber to flow into the secondary air inlet;

[0042] The air intake baffle has: a first air intake area arranged opposite to the air inlet, a second air intake area located outside the first air intake area, and a third air intake area located outside the second air intake area;

[0043] Each of the three air intake zones is equipped with several secondary air intake holes, including:

[0044] The distribution density of secondary air intake holes in the second air intake zone is greater than that in the first air intake zone and the third air intake zone.

[0045] The first air intake zone (corresponding to the air outlet) has sparser openings, which can "throttle" and "buffer" the concentrated high-speed airflow from the fan, preventing excessive air from directly and violently impacting the local combustion area. This helps maintain the stability of the flame root and reduces the possibility of the flame being blown away or flickering. The second air intake zone (outer air outlet zone) has denser openings, forming a highly efficient air distribution ring. This allows the airflow to be distributed more evenly and gently to the burner, better achieving "balanced air distribution and promoting more uniform combustion." This, in turn, enables more complete and uniform combustion, thereby improving overall heat exchange efficiency and achieving better heating results.

[0046] The third air intake zone, located at the outer edge of the second air intake zone, has relatively sparse secondary air intake holes. This moderately restricts excessive airflow to the outermost edge, which not only matches the relatively small amount of air required at the edge of the burner but also prevents heat loss or combustion instability that may be caused by excessive airflow at the edge.

[0047] The main beneficial effects of the above technical solution are as follows:

[0048] A flame arrester with a flame stabilizer is provided to improve the stability of the flame formed when the flame arrester is working.

[0049] We provide burners and gas water heaters with the aforementioned burners, and optimize the air intake structure in the gas water heater to improve the flame stability during use and optimize the overall heating effect.

[0050] Further or more detailed beneficial effects will be described in conjunction with specific embodiments in the detailed implementation. Attached Figure Description

[0051] The present invention will now be further described with reference to the accompanying drawings.

[0052] Figure 1 This is a schematic diagram of the overall structure of the firebox.

[0053] Figure 2 This is a schematic diagram of the internal flow channels of the firebox.

[0054] Figure 3 This is a cross-sectional view of the firebox.

[0055] Figure 4 This is a schematic diagram of the flame deflector installation.

[0056] Figure 5 This is a schematic diagram of the overall structure of the burner.

[0057] Figure 6 This is an assembly diagram of the main components of a gas water heater.

[0058] Figure 7 This is a schematic diagram of the gas circuit assembly.

[0059] Figure 8 This is a schematic diagram of the internal structure of a gas water heater.

[0060] Figure 9 This is a schematic diagram of the assembly structure of the burner in a gas water heater. Detailed Implementation

[0061] The present invention will be specifically illustrated below with reference to embodiments:

[0062] Example 1:

[0063] A burner 1a is placed in the burner 1 to direct the gas received at the primary air inlet 1.11 into the combustion chamber 1.2. The primary air inlet 1.11 is the opening in the burner 1 for receiving gas, and the combustion chamber 1.2 is the space in the gas water heater used to contain the flame.

[0064] like Figure 1 As shown, in this embodiment, the burner 1a is constructed of a plate, with an outlet end 1a.1 at its top. The outlet end 1a.1 has an outlet chamber 1a.3 formed inside it in a hollow configuration. An opening is made at the top of the outlet end 1a.1 to form a main gas outlet 1a.4, which is connected to the outlet chamber 1a.3 and allows the gas in the outlet chamber 1a.3 to be discharged outward.

[0065] like Figure 1 As shown, an opening is made on the side of the gas outlet 1a.1 to form a flame stabilizer 1a.5, which is connected to the gas outlet chamber 1a.3 and allows the gas in the gas outlet chamber 1a.3 to be discharged outward; the flame stabilizer 1a.5 is provided on one side of the gas outlet 1a.1, or the flame stabilizer 1a.5 is provided on both sides of the gas outlet 1a.1, and the flame stabilizers 1a.5 are distributed on both sides of the main gas outlet 1a.4.

[0066] Among them, the diameter of the flame stabilizer 1a.5 is smaller than that of the main gas outlet 1a.4, and vertically, the flame stabilizer 1a.5 is lower than the main gas outlet 1a.4.

[0067] like Figure 2 As shown, the burner 1a has a hollow cavity forming a gas flow channel 1a.2, with a gas inlet 1a.21 at one end for gas to flow in, and the other end extending to the gas outlet 1a.1 and communicating with the gas outlet chamber 1a.3. The gas inlet 1a.21 is used to align and communicate with the primary air inlet 1.11.

[0068] like Figure 2 As shown, the gas flow channel 1a.2 includes an inlet flow channel section 1a.2a and an outlet flow channel section 1a.2b.

[0069] The intake air passage section 1a.2a has a gas inlet 1a.21 at one end and an upward-facing convection port at the other end; the upper end of the outlet air passage section 1a.2b is connected to the outlet chamber 1a.3, and the lower end is connected to the convection port. The opening diameter of the outlet air passage section 1a.2b gradually increases from bottom to top.

[0070] like Figure 2 and Figure 3 As shown, the gas outlet passage section 1a.2b has a portion opposite to and above the convection port, and the sidewall of this portion has a flow-blocking portion 1a.8 protruding into the gas flow passage 1a.2. In this embodiment, for example, the flow-blocking portion 1a.8 protruding into the gas flow passage 1a.2 is formed by stamping the sidewall of the gas flow passage 1a.2.

[0071] like Figure 2 and Figure 3As shown, the protruding end of the flow-blocking portion 1a.8 is provided with a plurality of protrusions 1a.9 that protrude into the gas flow channel 1a.2. In this embodiment, for example, the protrusions 1a.9 that protrude into the gas flow channel 1a.2 are formed by further stamping the flow-blocking portion 1a.8. The plurality of protrusions 1a.9 are arranged at intervals in the transverse direction.

[0072] like Figure 2 As shown, in this embodiment, the intake air passage section 1a.2a has a throat 1a.2a1, the orifice size of the throat 1a.2a1 is smaller than the orifice size of the gas inlet 1a.21 and the primary air inlet 1.11; the intake air passage section 1a.2a has a portion located between the throat 1a.2a1 and the gas inlet 1a.21, and the orifice size of this portion gradually decreases in the direction from the gas inlet 1a.21 to the throat 1a.2a1.

[0073] like Figure 4 As shown, a flame deflector 1a.6 is fixed on the fire bar 1a. The flame deflector 1a.6 is located outside the gas outlet 1a.1 and has a portion that covers the flame port 1a.5 in the lateral direction.

[0074] In the horizontal direction, the baffle plate 1a.6 extends from the outside of the flame stabilizer 1a.5 to at least cover the bottom portion of the flame stabilizer 1a.5 (the lower portion of the flame stabilizer 1a.5 when it is divided equally in the vertical direction).

[0075] Alternatively, in the transverse direction, the flame deflector 1a.6 has a portion that covers the entire flame stabilizing port 1a.5 from the outside of the flame stabilizing port 1a.5. This portion is spaced apart from the gas outlet 1a.1 to define a flame guiding channel 1a.7 between the two. The flame guiding channel 1a.7 is connected to the flame stabilizing port 1a.5 and its upper end is open so that the gas in the flame stabilizing port 1a.5 can be ejected upward through the flame guiding channel 1a.7 and ignited to form a flame.

[0076] The portion of the flame deflector 1a.6 that covers the flame stabilizing port 1a.5 extends upward at an angle, so that the diameter of the flame guiding channel 1a.7 gradually increases from bottom to top.

[0077] When the burner 1a is in use: gas and air flow in together from the gas inlet 1a.21, pass through the gas flow channel 1a.2, and are ejected from the main gas outlet 1a.4 and the flame stabilizer 1a.5 respectively; at this time, an igniter is used to ignite it, forming an upward-burning main flame at the main gas outlet 1a.4 and an upward-burning side flame at the flame stabilizer 1a.5. The side flame is lower than the main flame and located on the side of the main flame, acting like an "anchor" to hold the main flame and prevent it from leaving the flame.

[0078] Example 2:

[0079] Burner 1 is used to receive fuel gas and generate a flame, such as Figure 5 As shown, the burner 1 is equipped with several burners 1a as described in Embodiment 1, each burner 1a has a gas inlet 1a.21, and the burner 1 has a primary air inlet 1.11 for external gas to flow into the gas inlet 1a.21.

[0080] Several burner rows 1a are arranged at intervals in the burner 1. Adjacent burner rows 1a are arranged at intervals, and the intervals between the burner rows form a whole air intake channel. The lower end of the air intake channel has a secondary air intake port 1.3, and the upper end is open, so that the air flowing in from the secondary air intake port 1.3 can be transported upward to the main gas outlet 1a.4 and the flame stabilizer port 1a.5 to supplement the oxygen required for combustion to form a flame at the main gas outlet 1a.4 and the flame stabilizer port 1a.5.

[0081] Example 3:

[0082] A gas water heater includes an outer casing and a main component housed inside the casing for heating operations. For example... Figure 1 As shown, the main components include the burner 1 described in Embodiment 2, a gas pipeline assembly 2 for connecting to the gas pipeline to deliver gas to the burner 1, a fan 4, a heat exchanger 6 for supplying water, and a fume hood 7.

[0083] Among them, such as Figure 6 As shown, a first plate 3a, a second plate 3b, a third plate 3c, and a fourth plate 3d are fixed around the burner 1. These four plates are connected by screws to form a burner housing. The first plate 3a, the second plate 3b, the third plate 3c, and the fourth plate 3d together form a vertically penetrating mounting cavity. A base plate 3e is fixed to the lower end of the burner housing to cover the lower opening of the mounting cavity. The burner 1 is placed in this mounting cavity and fixed to the burner housing by screws, dividing the mounting cavity into a combustion chamber 1.2 located above the burner 1 and an air inlet chamber 3.1 located below the burner 1. The air inlet chamber 3.1 is formed by the burner 1, the first plate 3a, the second plate 3b, the third plate 3c, the fourth plate 3d, and the base plate 3e.

[0084] The side wall of the intake chamber 3.1 is provided with an air inlet 3.2 for allowing external air to enter the intake chamber 3.1. For example, see attached... Figure 1 As shown, in this embodiment, an air inlet 3.2 is provided on the base plate 3e.

[0085] The heat exchanger 6 includes a heat exchanger shell and a heat exchange pipe 6a. The heat exchanger shell is fixed to the burner shell by means of, for example, screws. The heat exchanger shell has a heat exchange cavity, which is located above and communicates with the combustion chamber 1.2, and a portion of the heat exchange pipe 6a is placed in the heat exchange cavity.

[0086] The exhaust hood 7 is positioned above the heat exchanger 6 and is fixed to the heat exchanger housing, for example, with screws. It has an exhaust passage that connects to the building's exhaust duct to discharge the flue gas. The combustion chamber 1.2 is connected to the exhaust passage via a heat exchange chamber.

[0087] Fan 4 can be placed in the smoke exhaust duct, or as shown in the attached diagram. Figure 1 As shown, the fan 4 is fixed to the base plate 3e by means of screws, for example, and the air inlet 4.1 of the fan 4 is open, and the air outlet 4.2 is connected to the air inlet 3.2. When the fan 4 is started, it draws in air from outside the burner housing and delivers it to the air outlet 4.2, then to the air inlet 3.2, and finally into the air intake chamber 3.1.

[0088] The gas circuit assembly 2 is, for example, an integrated gas circuit assembly, which has a gas output end 2.1, which includes a plurality of nozzles 2.2 for spraying gas. The gas output end 2.1 is inserted into and fixed in the air inlet chamber 3.1, for example, the gas output end 2.1 is fixed to the burner 1 by screws.

[0089] Each nozzle 2.2 is aligned with a primary air inlet 1.11 for gas connection. When gas is received in the gas circuit assembly 2, it can be injected into the primary air inlet 1.11 through the nozzle 2.2 to supply gas to the burner 1.

[0090] like Figure 6 As shown, in this embodiment, the base plate 3e is provided with an insertion slot 3e.1, and the fourth plate 3d is fixed to the base plate 3e and covers the opening of the insertion slot 3e.1, so that the inner wall of the insertion slot 3e.1 and the fourth plate 3d form an insertion hole. The gas output end 2.1 passes through the insertion hole and is placed in the air intake chamber 3.1, so that the gas circuit assembly 2 has an insertion part inserted into the insertion hole. The insertion part is fitted with a sealing member 5, which fills the gap between the insertion part and the inner wall of the insertion hole. The sealing member 5 is an annular part made of elastic material such as silicone or rubber, which is fitted onto the insertion part of the gas circuit assembly 2.

[0091] The main gas outlet 1a.4 and flame stabilizer 1a.5 in burner 1 are connected to combustion chamber 1.2, and the primary air inlet 1.11 is connected to air inlet chamber 3.1. After the gas in nozzle 2.2 is injected into the primary air inlet 1.11, it flows into combustion chamber 1.2 through gas flow channel 1a.2 for ignition by an igniter to form a flame.

[0092] The upper end of the air intake passage in burner 1 is connected to the combustion chamber 1.2, and the lower end of the secondary air intake port 1.3 is connected to the intake chamber 3.1.

[0093] When the gas water heater is working, gas is supplied by the gas circuit assembly 2 connected to the gas pipeline, and delivered through nozzle 2.2 to the primary air inlet 1.11, and then through the gas flow channel 1a.2 to the combustion chamber 1.2. Air is input from the air inlet 3.2 by the fan 4. Part of it is delivered to the combustion chamber 1.2 through the secondary air inlet 1.3 to supplement the air required for gas combustion; the other part is input into the gas flow channel 1a.2 through the primary air inlet 1.11 to pre-mix with the gas. When the gas and air enter the combustion chamber 1.2, they are ignited by an igniter to form a flame that heats the heat exchanger 6.

[0094] In this embodiment, based on the arrangement of the air inlet 3.2, a number of primary air inlets 1.11 are configured such that the closer they are to the air inlet 3.2, the smaller their opening diameter. For example, the diameter of the primary air inlets 1.11 can decrease in an arithmetic sequence or a preset proportional coefficient according to their distance from the air inlet.

[0095] Moreover, such as Figure 8 As shown, in this embodiment, the primary air inlet 1.11 is located on the side wall (left side wall, right side wall, front side wall, or rear side wall) of the burner 1, and the secondary air inlet 1.3 is located on the bottom wall of the burner 1, that is, on the bottom plate 3e as described above. The air inlet 3.2 is located on the bottom wall of the air inlet chamber 3.1 and is vertically aligned with the secondary air inlet 1.3.

[0096] like Figure 8 As shown, in this embodiment, the primary air inlet 1.11 is arranged at intervals with the side wall of the air inlet chamber 3.1 to form an insertion space between them; the nozzle 2.2 is placed in the insertion space and is aligned with the primary air inlet 1.11.

[0097] like Figure 8 and Figure 9 As shown, in this embodiment, the diameter of the secondary air inlet 1.3 is larger than that of the air inlet 3.2. An air inlet baffle 1.4 is fixed to the bottom of the burner 1 using, for example, screws, and this air inlet baffle 1.4 covers the secondary air inlet 1.3. The air inlet baffle 1.4 is provided with a plurality of secondary air inlet holes 1.5, which allow air from the air inlet chamber 3.1 to flow into the secondary air inlet 1.3.

[0098] The air intake baffle 1.4 includes: a first air intake zone arranged opposite to the air inlet 3.2, a second air intake zone located outside the first air intake zone, and a third air intake zone located outside the second air intake zone. The specific coverage areas of the second and third air intake zones are set according to specific combustion requirements.

[0099] For example, vertically, the first air intake zone is the area that completely overlaps with the outline of the air inlet 3.2 on the frontal projection surface of the air intake baffle 1.4; the second air intake zone is the area surrounding the first air intake zone with a width of L1; and the third air intake zone is the remaining part located outside the second air intake zone. The size of L1 is set according to specific combustion requirements.

[0100] Each of the three air intake zones is provided with a number of secondary air intake holes 1.5. The distribution density of the secondary air intake holes 1.5 in the second air intake zone is greater than that in the first air intake zone.

[0101] The distribution density of the secondary air intake 1.5 in the second air intake zone is greater than that in the third air intake zone.

[0102] At this time, after the air enters the intake chamber 3.1, part of it is diverted through several secondary air intake holes 1.5 to flow into the secondary air intake port 1.3, and then transported to the combustion chamber 1.2 through the secondary air intake port 1.3 to supplement the air required for combustion of the gas; the other part is input into the gas flow channel 1a.2 from the primary air intake port 1.11 to pre-mix with the gas.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Furthermore, the terms "vertical," "horizontal," "front," and "rear," etc., mentioned in the embodiments of the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These are merely for the convenience of describing the present invention and 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 the present invention. It should be further noted that, unless otherwise explicitly specified and limited, terms such as "install," "connect," "join," and "fix" in the description should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0104] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A burner, having an outlet end at its top, wherein the interior of the outlet end is hollow and forms an outlet chamber, and the top of the outlet end is provided with a main combustion gas outlet for discharging gas from the outlet chamber outward; The burner has a hollow cavity with a gas flow channel, one end of which forms a gas inlet and the other end extends to the gas outlet and is connected to the gas outlet cavity. Its features are: At least one side of the gas outlet end is further provided with a flame stabilizer for the gas in the gas outlet chamber to be discharged outward; The diameter of the flame stabilizer is smaller than the diameter of the main gas outlet, and vertically, the flame stabilizer is configured to be lower than the main gas outlet. The fire bar also includes a flame deflector plate placed outside the outlet end, which, in the lateral direction, at least covers the bottom portion of the flame stabilizer.

2. The fire grill according to claim 1, characterized in that: The flame stabilizer is provided on both sides of the gas outlet.

3. The fire grill according to claim 1, characterized in that: The flame deflector has a portion that completely covers the flame stabilizer in the lateral direction, and this portion is spaced apart from the gas outlet to define a flame guide channel with an open upper end between them. The flame guiding channel is connected to the flame stabilizing port.

4. The fire grill according to claim 3, characterized in that: The diameter of the flame guiding channel gradually increases from bottom to top.

5. The fire rack according to any one of claims 1 to 4, characterized in that: The gas flow channel includes: The air intake channel section has a gas inlet at one end and an upward-facing convection port at the other end. The air outlet section is connected at its upper end to the air outlet cavity and at its lower end to the convection port. The gas outlet section has a portion that is opposite to and above the convection port, and the sidewall of this portion has a flow-blocking portion that protrudes into the gas flow channel.

6. The fire grill according to claim 5, characterized in that: The flow-blocking part is provided with a plurality of protrusions that protrude into the gas flow channel; Several of the aforementioned convex hulls are arranged at intervals in the transverse direction.

7. A burner, characterized in that: It includes a fire rack as described in any one of claims 1 to 6.

8. A gas-fired water heater, characterized in that, include: The burner of claim 7 has a secondary air inlet for air to flow into the combustion chamber, and each of the gas inlets is connected to a primary air inlet, and the main gas outlet and the flame stabilizer are both connected to the combustion chamber. A gas circuit assembly for connection to a gas pipeline and having a gas output end having a plurality of nozzles for ejecting gas. A plurality of plates are arranged around the burner, which together with the burner form an air inlet chamber, and the primary air inlet and the secondary air inlet are both connected to the air inlet chamber; One side wall of the air intake chamber has an air inlet for external air to enter the air intake chamber; The gas output end is inserted into and fixed in the air inlet chamber, and each of the nozzles is aligned with one of the primary air inlets for gas connection. Several of the primary air inlets are configured such that the opening diameter is smaller the closer they are to the air inlet.

9. The gas water heater according to claim 8, characterized in that: The primary air inlet is located on the side wall of the burner, and the secondary air inlet is located on the bottom wall of the burner; The air inlet is located on the bottom wall of the air intake chamber and is vertically aligned with the secondary air inlet.

10. The gas water heater according to claim 9, characterized in that: The bottom of the burner is connected to an air inlet baffle that covers the secondary air inlet. The air inlet baffle is provided with a plurality of secondary air inlet holes for the air in the air inlet chamber to flow into the secondary air inlet. The air intake baffle has: a first air intake area arranged opposite to the air inlet, a second air intake area located outside the first air intake area, and a third air intake area located outside the second air intake area; Each of the three air intake zones is provided with several of the aforementioned secondary air intake holes, wherein: The distribution density of the secondary air intake holes in the second air intake zone is greater than the distribution density of the secondary air intake holes in the first air intake zone and the third air intake zone.

Images