Burner and gas appliance

Abstract

The application discloses a burner and a gas equipment. The burner comprises a combustion main body, an air inlet assembly and an air inlet assembly. The combustion main body forms a first combustion chamber and a second combustion chamber, and is used for heating the temperature in the first combustion chamber to a preset temperature. The air inlet assembly is used for connecting gas to the first combustion chamber and spraying gas to the second combustion chamber. The air inlet assembly is used for connecting air to the first combustion chamber and spraying air to the second combustion chamber. The spraying direction of the gas and the spraying direction of the air intersect in the second combustion chamber, so that high-temperature air combustion is realized in the second combustion chamber. The technical scheme provided by the application can realize the purpose of high-temperature air combustion in the second combustion chamber.

Description

Technical Field

[0001] This invention relates to the field of high-temperature air combustion technology, and particularly to a burner and gas equipment. Background Technology

[0002] High-temperature air combustion (MILD) technology is a mild combustion mode under low-oxygen dilution conditions. Its main combustion characteristics include: low reaction rate, low local heat release, uniform heat flow distribution, low peak combustion temperature, and low noise. Because MILD combustion has a more uniform temperature field and a lower peak combustion temperature, it reduces the formation of thermal nitrogen oxides, significantly reducing NOx and CO emissions compared to conventional combustion methods.

[0003] Although high-temperature air combustion has many advantages, it is currently used primarily in industrial applications and not in daily life. Summary of the Invention

[0004] The main objective of this invention is to provide a burner and gas equipment with high-temperature air combustion function.

[0005] To achieve the above objectives, the present invention provides a burner comprising:

[0006] The combustion body has a first combustion chamber and a second combustion chamber connected in sequence. The combustion body is used to ignite in the first combustion chamber to heat the temperature in the first combustion chamber to a preset temperature.

[0007] An intake assembly is used to supply fuel gas to the first combustion chamber and to inject fuel gas into the second combustion chamber; and,

[0008] An air intake assembly is used to supply air to the first combustion chamber and to inject air into the second combustion chamber;

[0009] The direction of the gas injection and the direction of the air injection intersect in the second combustion chamber, so that high-temperature air combustion occurs in the second combustion chamber.

[0010] In one embodiment, the second combustion chamber is provided with an air injection port connected to the air intake assembly and a gas injection port connected to the air intake assembly, wherein the air injection port and the gas injection port are spaced apart.

[0011] The opening direction of the air injection port is inclined in opposite directions to the opening direction of the gas injection port.

[0012] In one embodiment, the second combustion chamber is provided with an air injection port connected to the air intake assembly and a gas injection port connected to the air intake assembly, wherein the air injection port and the gas injection port are spaced apart.

[0013] The air intake assembly includes an air guide plate disposed at the air injection port, the air guide plate being arranged at an angle to the plane of the air injection port; and / or,

[0014] The air intake assembly includes an air guide plate disposed at the gas injection port, and the air guide plate is set at an angle to the plane where the gas injection port is located.

[0015] In one embodiment, the air injection port has a proximal side near the gas injection port and a distal side away from the gas injection port;

[0016] The air guide plate extends from the far side of the air jet towards the near side to be spaced apart from the near side of the air jet.

[0017] In one embodiment, the combustion body includes a duct plate forming the air injection port;

[0018] The air duct plate is configured with a convex arc surface protruding outwards from the second combustion chamber; and / or

[0019] The portion of the air guide plate facing the air injection port is arranged in a concave arc shape that is recessed into the second combustion chamber.

[0020] In one embodiment, the air injection port is positioned closer to the first combustion chamber than the gas injection port.

[0021] In one embodiment, multiple air injection ports and / or gas injection ports are spaced apart on the side of the second combustion chamber;

[0022] Each of the air jets includes a plurality of jet holes arranged in a grid pattern.

[0023] In one embodiment, the air intake assembly includes an exhaust assembly disposed on the side of the second combustion chamber away from the first combustion chamber.

[0024] In one embodiment, the combustion body includes:

[0025] A housing, forming the first combustion chamber and the second combustion chamber; and,

[0026] An atmospheric burner is used to ignite the first combustion chamber to heat the temperature inside the first combustion chamber to a preset temperature.

[0027] In one embodiment, the intake assembly includes a gas pipeline and a gas proportional valve. The gas pipeline includes a first gas flow channel connected to the atmospheric burner and a second gas flow channel connected to the second combustion chamber. The gas proportional valve is used to adjust the gas flow rate of the first gas flow channel and the second gas flow channel, respectively.

[0028] In one embodiment, the atmospheric burner includes a plurality of combustion cells, each combustion cell having an airflow passage for circulating a gas mixture;

[0029] The air intake assembly also includes a gas distribution bar, through which the first gas flow channel is connected one-to-one with multiple airflow channels of the multiple combustion cells.

[0030] In one embodiment, multiple gas injection ports are spaced apart on the side of the second combustion chamber;

[0031] The air intake assembly also includes an air distribution structure, through which the second gas flow channel is connected to a plurality of gas injection ports in a one-to-one correspondence.

[0032] In one embodiment, the atmospheric burner includes a combustion unit having an airflow channel, a combustion assembly disposed at the outlet of the airflow channel, and an ignition device disposed in the first combustion chamber for igniting the combustion assembly.

[0033] In one embodiment, the combustion assembly includes a plate-shaped body covering the air outlet of the airflow channel and a plurality of air vents extending through the plate-shaped body along its thickness direction.

[0034] In one embodiment, the plate-like body has two first peripheral sides disposed opposite to each other;

[0035] The plate-shaped body is inclined from the two first outer peripheral sides toward its center toward the airflow channel.

[0036] In one embodiment, the combustion assembly further includes two guide plates protruding from two of the first outer peripheral sides of the plate-shaped body, the two guide plates extending in a direction away from each other in the direction protruding from the plate-shaped body.

[0037] In addition, the present invention also proposes a gas-fired device, including a heat exchanger and a burner as described above, wherein the heat exchanger produces hot water using the heat generated by the burner.

[0038] In one embodiment, the gas equipment further includes a main body, the main body forming a heat exchange chamber communicating with the second combustion chamber, the heat exchange chamber being provided with a flue gas outlet;

[0039] The first exhaust assembly is located at the exhaust port of the heat exchange chamber.

[0040] In one embodiment, the gas appliance includes a gas water heater or a gas wall-hung boiler.

[0041] In the technical solution provided by this invention, the gas supplied by the intake component entrains primary air into the first combustion chamber and ignites it; the air intake component introduces secondary air, and the combustion in the first combustion chamber generates high-temperature flue gas; the gas supplied by the intake component and the air supplied by the air intake component intersect in the second combustion chamber, so that the mixed gas and the high-temperature flue gas can cooperate to generate an entrainment effect, causing the high-temperature flue gas to flow back, which can not only keep the second combustion chamber warm, so that the temperature in the second combustion chamber is higher than the auto-ignition point of the fuel, thus realizing the auto-ignition of the fuel; it can also dilute the air by entraining the air in the jet, so that the oxygen concentration in the second combustion chamber is lower than a certain value, thus achieving uniform combustion and achieving the purpose of high-temperature air combustion. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] Figure 1 A front view schematic diagram of an embodiment of the burner provided by the present invention;

[0044] Figure 2 for Figure 1 Schematic diagram of the longitudinal section of the burner;

[0045] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0046] Figure 4 for Figure 1 A partial structural front view of the second combustion chamber.

[0047] Figure 5 for Figure 1 A three-dimensional schematic diagram of part of the structure of the second combustion chamber.

[0048] Explanation of icon numbers:

[0049]

[0050]

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0053] The purpose of this invention is to utilize the characteristics of high-temperature air combustion to design a novel burner and apply it to gas-fired equipment, enabling the gas-fired equipment to effectively reduce CO and NOx emissions and lower the noise level of the gas-fired equipment.

[0054] This invention provides a burner that is applied to gas appliances and related products and equipment, including gas wall-hung boilers, which use gas combustion to generate high-temperature hot water for home bathing and heating. For ease of understanding, the following example is applied to a gas wall-hung boiler. Figures 1 to 5 An embodiment of the burner provided by the present invention.

[0055] Please see Figures 1 to 3 The burner provided by the present invention includes a combustion body, an air intake assembly 120, and an air intake assembly 130. The combustion body forms a first combustion chamber 101 and a second combustion chamber 102 connected in sequence. The combustion body is used to ignite in the first combustion chamber 101 to heat the temperature in the first combustion chamber 101 to a preset temperature. The air intake assembly 120 is used to supply gas to the first combustion chamber 101 and to inject gas into the second combustion chamber 102. The air intake assembly 130 is used to supply air to the first combustion chamber 101 and to inject air into the second combustion chamber 102. The injection direction of the gas and the injection direction of the air intersect in the second combustion chamber 102 to enable high-temperature air combustion in the second combustion chamber 102.

[0056] In the technical solution provided by this invention, the gas supplied by the intake assembly 120 entrains primary air into the first combustion chamber 101 and ignites it; the air intake assembly 130 introduces secondary air, and the combustion in the first combustion chamber 101 generates high-temperature flue gas; the gas supplied by the intake assembly 120 and the air supplied by the air intake assembly 130 intersect in the second combustion chamber 102, so that the mixed gas and the high-temperature flue gas can cooperate to generate an entrainment effect, causing the high-temperature flue gas to flow back. This not only keeps the second combustion chamber 102 warm, so that the temperature in the second combustion chamber 102 is higher than the auto-ignition point of the fuel, thus achieving auto-ignition of the fuel; it also dilutes the air by entraining the air through the jet, so that the oxygen concentration in the second combustion chamber 102 is lower than a certain value, thus achieving uniform combustion and achieving the purpose of high-temperature air combustion.

[0057] The specific form of the combustion body is not limited in this design, but for ease of understanding, in the following embodiments, the combustion body includes a housing 100 and an atmospheric burner 110, wherein the housing 100 forms the first combustion chamber 101 and the second combustion chamber 102; the atmospheric burner 110 is used to ignite in the first combustion chamber 101 to heat the temperature in the first combustion chamber 101 to a preset temperature.

[0058] It is understood that the atmospheric burner 110 includes a combustion unit 111, which has an airflow channel for the combustion gases to pass through. In specific applications, the combustion unit 111 can be housed within the first combustion chamber 101, and the airflow channel of the combustion unit 111 is connected to the first combustion chamber 101. The air intake assembly 120 provides combustion gas to the atmospheric burner 110. When the combustion gas directly enters the airflow channel, or enters the airflow channel through the first combustion chamber 101, it entrains some primary air from the indoor environment or the first combustion chamber 101, forming a sufficient mixture of gases in the airflow channel so that the combustion unit 111 can be ignited.

[0059] The air intake assembly 130 includes an exhaust assembly. The exhaust assembly draws outside air into the first combustion chamber 101 or the airflow channel and accelerates the airflow, so that the combustion unit 111 obtains more and more continuous secondary air, thereby enabling the combustion unit 111 to continue burning and heating the temperature in the first combustion chamber 101 to a preset temperature, thus achieving high-temperature preheating of the air.

[0060] The intake assembly 120 injects fuel gas into the second combustion chamber 102, and the air intake assembly 130 injects air into the second combustion chamber 102. Since the injection directions of the fuel gas and the air intersect within the second combustion chamber 102, the fuel gas and air mix together. The injected fuel gas and air, in conjunction with the high-temperature preheated air within the second combustion chamber 102, create an entrainment effect, causing the high-temperature flue gas to continuously circulate within the second combustion chamber 102. This circulating flue gas helps to keep the second combustion chamber 102 warm, ensuring that the temperature within the second combustion chamber 102 exceeds the auto-ignition point of the fuel, thus achieving auto-ignition. Furthermore, the circulating flue gas can dilute the air through jet entrainment, lowering the oxygen concentration within the second combustion chamber 102 below a certain value, achieving uniform combustion and realizing the purpose of high-temperature air combustion.

[0061] It should be noted that the structure of the aforementioned burner frame enables the miniaturization of components that achieve high-temperature air combustion, thus providing more application space and value. In addition, it features low noise, complete combustion, and low exhaust pollution. When applied to gas water heaters and related products and equipment that use gas combustion to generate high-temperature hot water for home bathing and heating, it not only meets the requirements but also brings the effects of complete combustion and low pollutant emissions that are not available in existing water heater burners.

[0062] It is understandable that the target temperature for high-temperature preheated air cannot be too low, and should ideally not be lower than 600 degrees Celsius. Generally, controlling it between 600 and 1200 degrees Celsius can ensure good automatic combustion when the high-temperature gas comes into contact with the combustion gas in the combustion chamber, eliminating the need for ignition. There are several ways to achieve high-temperature preheated air, such as controlling the heating time, controlling the gas-to-air ratio, providing insulation, and increasing the residence time of the high-temperature gas in the second combustion chamber 102.

[0063] In the above description, the oxygen concentration in the second combustion chamber 102 needs to be below a certain value, specifically set to be below 5% to 10%. The oxygen concentration in the second combustion chamber 102 can be achieved by adjusting the ratio of fuel gas to air in the premixer. For example, with a fixed fuel gas quantity, the oxygen concentration in the second combustion chamber 102 can be adjusted by regulating the real-time air intake volume, thus controlling the fuel gas to air ratio. The oxygen concentration in the second combustion chamber 102 can be controlled based on the size of the second combustion chamber 102 and the injection speed.

[0064] There are several ways to achieve the intersection of the gas injection direction and the air injection direction within the second combustion chamber 102 as described above. In one embodiment, the second combustion chamber 102 is provided with an air injection port 103 connected to the air intake assembly 130 and a gas injection port 104 connected to the air intake assembly 120. The air injection port 103 and the gas injection port 104 are spaced apart. The opening direction of the air injection port 103 and the opening direction of the gas injection port 104 are inclined towards each other. The housing 100 includes two duct plates 100a that respectively form the air injection port 103 and the gas injection port 104. By setting the two duct plates 100a at an included angle, the opening direction of the air injection port 103 and the opening direction of the gas injection port 104 can be inclined towards each other.

[0065] Please see Figures 4 to 5In one embodiment, similarly to the above, the second combustion chamber 102 is provided with an air injection port 103 communicating with the air intake assembly 130 and a gas injection port 104 communicating with the air intake assembly 120. The air injection port 103 and the gas injection port 104 are spaced apart. The air intake assembly 130 includes a guide plate 140 disposed at the air injection port 103, and the guide plate 140 is disposed at an angle to the plane where the air injection port 103 is located. The guide plate 140 guides the air injected into the second combustion chamber 102 through the air injection port 103, so that the air can be obliquely ejected towards the gas injection port 104 along the inclined direction of the guide plate 140, so that the gas and air intersect in the second combustion chamber 102, and the high-temperature flue gas is entrained and the recirculation is enhanced.

[0066] Of course, the air guide plate 140 can also be set at the gas injection port 104 to guide the gas injected into the second combustion chamber 102 through the gas injection port 104, so that the gas can be tilted and sprayed out towards the air injection port 103 along the tilt direction of the air guide plate 140, so that the gas and air intersect in the second combustion chamber 102; or, the air guide plate 140 can be provided with two corresponding to the gas injection port 104 and the air injection port 103, so as to guide the air and gas injected into the second combustion chamber 102, so that the jets of the two intersect in the second combustion chamber 102.

[0067] Specifically, in one embodiment, the air injection port 103 has a proximal side near the gas injection port 104 and a distal side away from the gas injection port 104; the air guide plate 140 extends from the distal side of the air injection port 103 towards the proximal side to a distance from the proximal side of the air injection port 103. The air guide plate 140 serves two purposes: firstly, it forms an inclined guide surface, causing air injected from the air injection port 103 into the second combustion chamber 102 to be initially blocked by the air guide plate 140 and flow in the inclined extension direction of the air guide plate 140, i.e., towards the gas injection port 104; secondly, it forms a channel with an increasing air passage area along the airflow direction, achieving a certain degree of air diffusion and facilitating rapid mixing of gas and air when intersecting with the injected gas.

[0068] In one embodiment, the combustion body includes a duct plate 100a forming the air injection port 103; the duct plate 100a is configured with a convex arc surface protruding outward from the second combustion chamber 102; and / or, the portion of the air guide plate 140 facing the air injection port 103 is configured with a concave arc surface recessed inward from the second combustion chamber 102. This configuration ensures sufficient space between the duct plate 100a and the air guide plate 140 for air to change direction, preventing air backflow due to insufficient space.

[0069] The placement of the air injection port 103 and the gas injection port 104 is not limited in this design. However, optionally, in one embodiment, the air injection port 103 is positioned closer to the first combustion chamber 101 than the gas injection port 104. This arrangement ensures that air is injected away from the first combustion chamber 101 to intersect with the gas, avoiding interference with the combustion of the atmospheric burner 110 within the first combustion chamber 101 due to excessive proximity to the first combustion chamber 101.

[0070] Multiple air injection ports 103 and / or gas injection ports 104 are spaced apart on the side of the second combustion chamber 102. The specific number, spacing, and arrangement are not limited in this design. Each air injection port 103 includes multiple injection holes arranged in a grid pattern to achieve uniform dispersion and convergence of air, which helps to mix air and gas in the second combustion chamber 102.

[0071] The exhaust assembly can be located at a suitable position in the first combustion chamber 101 or the second combustion chamber 102. In one embodiment, the exhaust assembly is located on the side of the second combustion chamber 102 away from the first combustion chamber 101. Specifically, the second combustion chamber 102 generally has a flue gas outlet, which is generally connected to the heat exchange chamber 200. This outlet is used to discharge the high-temperature flue gas that has returned to the second combustion chamber 102 to the heat exchange chamber 200 to exchange heat with the tap water passing through the heat exchange chamber 200, thereby producing hot water. By placing the exhaust assembly at the flue gas outlet of the second combustion chamber 102, when the exhaust assembly is working, it can draw outside air into the airflow channel to replenish the required secondary air to the atmospheric burner 110. At the same time, the exhaust assembly can drive the high-temperature flue gas from the second combustion chamber 102 to be discharged into the heat exchange chamber 200, thereby improving the heat exchange effect.

[0072] Furthermore, in one embodiment, when the exhaust assembly is operating, the drawn-in air flows in a first direction within the first combustion chamber 101; the atmospheric burner 110 includes a combustion unit 111 disposed within the first combustion chamber 101, the combustion unit 111 having an airflow channel for flowing mixed gas, the airflow channel being disposed through the first direction. The direction of the airflow channel is aligned with the flow direction of the drawn-in air, which on the one hand reduces the wind resistance of the drawn-in air and allows more air to flow through the airflow channel per unit time, helping to improve the efficiency of secondary air replenishment; on the other hand, it reduces the obstruction of the flow of drawn-in air by the combustion unit 111, thereby preventing collision between the drawn-in air and the outer surface of the combustion unit 111, which helps to reduce noise.

[0073] In one embodiment, the air intake assembly 120 includes a gas pipeline 121 and a gas proportional valve 122. The gas pipeline 121 includes a first gas flow channel 123 connected to the atmospheric burner 110 and a second gas flow channel 124 connected to the second combustion chamber 102. The gas proportional valve 122 is used to adjust the gas flow rates of the first gas flow channel 123 and the second gas flow channel 124 respectively. The inlet of the gas pipeline 121 is connected to a gas source, and the outlet of the gas pipeline 121 is connected to the first gas flow channel 123 and the second gas flow channel 124 respectively. The gas proportional valve 122 can adjust the gas flow rates of the first gas flow channel 123 and the second gas flow channel 124 respectively, so that the amount of gas in the atmospheric burner 110 and the second combustion chamber 102 can be adjusted, thereby realizing the adjustable and controllable ratio of gas to air.

[0074] In one embodiment, the atmospheric burner 110 includes a plurality of combustion cells 111, each combustion cell 111 having an airflow channel for circulating a gas mixture; the air intake assembly 120 further includes a gas distributor 125, through which the first gas flow channel 123 is connected to the plurality of airflow channels of the plurality of combustion cells 111 in a one-to-one correspondence. The gas distributor 125 ensures that the first gas pipe 121 can simultaneously provide approximately equal amounts of gas to the plurality of combustion cells 111, resulting in substantially the same combustion effect for the plurality of combustion cells 111.

[0075] Taking the gas injection port 104 as an example, multiple gas injection ports 104 are spaced apart on the side of the second combustion chamber 102. The specific arrangement of the multiple gas injection ports 104 is not limited. In specific applications, the multiple gas injection ports 104 can be spaced apart along the circumferential direction of the second combustion chamber 102, thereby enabling high-speed jetting of high-temperature flue gas in the second combustion chamber 102 from multiple directions and strengthening the circulation and recirculation of high-temperature flue gas; or, after several gas injection ports 104 form an injection port group, at least two injection port groups are arranged on opposite sides of the second combustion chamber 102, so that the airflow is injected towards each other, thereby intensifying the convection of flue gas in the second combustion chamber 102.

[0076] The opening orientation of each of the multiple gas injection ports 104 is not limited. Depending on actual needs, the opening orientations of the multiple gas injection ports 104 can be the same or at least partially different. In one embodiment, when the multiple gas injection ports 104 are spaced apart along the circumferential direction of the second combustion chamber 102, the opening orientation of all gas injection ports 104 can be set to face the central axis of the second combustion chamber 102; alternatively, all gas injection ports 104 can be set inclined on the same side along the circumferential direction of the second combustion chamber 102, so that the airflow ejected from the multiple gas injection ports 104 is vortex-shaped, thereby making the high-temperature flue gas that is entrained and returned approximately vortex-shaped, which helps to extend the return path of the high-temperature flue gas, enhance the circulation and return effect of the flue gas in the second combustion chamber 102, and achieve good heat preservation in the second combustion chamber 102.

[0077] The air intake assembly 120 also includes an air distribution structure 126, through which the second gas flow channel 124 is connected to a plurality of gas injection ports 104 in a one-to-one correspondence, thereby realizing synchronous and homogeneous jets from the plurality of injection ports.

[0078] Please see Figures 1 to 3 In one embodiment, the atmospheric burner 110 includes a combustion unit 111 with an airflow channel, a combustion assembly 112 disposed at the outlet of the airflow channel, and an ignition device disposed in the first combustion chamber 101 for igniting the combustion assembly 112. By placing the combustion assembly 112 at the outlet of the airflow channel, air and fuel gas are substantially mixed in the airflow channel before being ignited by the ignition device at the combustion assembly 112, achieving continuous and uniform combustion.

[0079] The specific form of the combustion assembly 112 is not limited in this design. In one embodiment, the combustion assembly 112 includes a plate-shaped body 112a covering the air outlet of the airflow channel, and a plurality of air vents 112b extending along the thickness direction of the plate-shaped body 112a. The plurality of air vents 112b can allow the mixed gas to pass through and achieve a uniform distribution of the mixed gas on the surface of the plate-shaped body 112a, thereby facilitating the uniform combustion of the mixed gas.

[0080] For ease of understanding, the distance from the outer periphery of the plate-shaped body 112a to its center is defined as from the outside to the inside. Furthermore, a connecting plate segment is formed by protruding outward from the outer periphery of the plate-shaped body 112a in the direction of the airflow channel. The connecting plate segment extends along the circumferential direction of the plate-shaped body 112a to improve the sealing effect of the plate-shaped body 112a on the air outlet of the airflow channel.

[0081] Next, in one embodiment, the plate-shaped body 112a is inclined from the outside to the inside towards the airflow channel, so that a recessed structure is formed in the middle of the plate-shaped body 112a facing the airflow channel. This recessed structure can guide and gather the mixed gas flowing out of the airflow channel, and prevent the mixed gas from being affected by the external airflow and thus affecting the combustion effect.

[0082] Specifically, please refer to Figure 4 In one embodiment, the plate-shaped body 112a has two first outer peripheral sides arranged opposite to each other; the plate-shaped body 112a is inclined from the two first outer peripheral sides toward the center toward the airflow channel, roughly forming a V-shaped structure, which helps to simplify the structure of the plate-shaped body 112a and makes it easy to process and shape while gathering the mixed gas to a certain extent.

[0083] Furthermore, in one embodiment, the combustion assembly 112 further includes two guide plates 112c protruding from the two first outer peripheral sides of the plate-shaped body 112a, respectively. The two guide plates 112c extend in a direction away from each other in the direction of protrusion relative to the plate-shaped body 112a. The arrangement of the guide plates 112c can, on the one hand, block the interference of external airflow on the combustion flame at the plate-shaped body 112a, ensuring stable combustion; on the other hand, it can work with the inclined plate-shaped body 112a to gather the mixed gas and form a cone-shaped flame.

[0084] It is understandable that the guide plate 112c can be set as an inclined straight plate or as an arc surface with a gradually changing curvature, in order to reduce the obstruction and interference to the airflow.

[0085] In one embodiment, the guide plate 112c has an air supply port extending along its thickness. The air supply port is used to supply a certain amount of air to the combustion flame at the plate-shaped body 112a, achieving better and more stable combustion. There may be one or more air supply ports.

[0086] The arrangement of the multiple vents 112b on the plate-shaped body 112a and the arrangement of the multiple air inlets on the guide plate 112c are not limited. Taking the arrangement of the multiple vents 112b on the plate-shaped body 112a as an example, the multiple vents 112b on the plate-shaped body 112a can be randomly distributed, arranged in an array, arranged radially, or arranged in a grid pattern, etc. The arrangement of the multiple air inlets on the guide plate 112c is similar and will not be described in detail. The specific size and shape of the vents 112b and the air inlets are also not limited and can be set according to specific needs.

[0087] Furthermore, this invention also provides a gas-fired device, specifically a gas water heater or a gas wall-hung boiler. The gas-fired device includes a heat exchanger and a burner as described above. It also includes a main structure with a heat exchange chamber 200 and a flue gas outlet communicating with the heat exchanger. The heat exchanger is located within the heat exchange chamber, and the burner has a flue gas outlet that communicates with the heat exchange chamber 200. The heat exchanger is connected to an external water source, such as tap water. The high-temperature flue gas entering the heat exchange chamber 200 through the burner's flue gas outlet carries sufficient heat to continuously heat the water within the heat exchanger, raising the water temperature to the desired level to produce hot water. The exhaust fan assembly is located at the flue gas outlet of the heat exchange chamber 200.

[0088] It is understood that the heat exchanger includes heat exchange tubes that pass through the heat exchange chamber 200. One end of the heat exchange tubes is connected to an external water source, and the other end is for user use. When the burner and exhaust assembly are working, the flue gas generated by combustion in the combustion chamber enters the heat exchange chamber 200. The tap water is heated through heat conduction between the heat exchange tubes and the high-temperature flue gas, thus ultimately producing hot water. The specific arrangement of the heat exchange tubes in the heat exchange chamber 200 is not limited. For example, the heat exchange tubes can be bent multiple times and placed inside the heat exchange chamber 200, or coiled around the perimeter of the heat exchange chamber 200, etc.

[0089] It should be noted that the detailed structure of the burner in the gas equipment can be referred to the above-described burner embodiments, and will not be repeated here. Since the above-described burner is used in the gas equipment of the present invention, the embodiments of the gas equipment of the present invention include all the technical solutions of all the above-described burner embodiments, and the technical effects achieved are exactly the same, and will not be repeated here.

Claims

1. A burner, characterized in that, include: The combustion body has a first combustion chamber and a second combustion chamber connected in sequence. The combustion body is used to ignite in the first combustion chamber to heat the temperature in the first combustion chamber to a preset temperature. The second combustion chamber is provided with an air injection port and a gas injection port spaced apart. The air injection port has a proximal side close to the gas injection port and a distal side away from the gas injection port. An intake assembly, configured to supply fuel gas to the first combustion chamber and inject fuel gas into the second combustion chamber, and connected to the fuel gas injection port; and, An air intake assembly is used to supply air to the first combustion chamber and to inject air into the second combustion chamber. It is connected to the air injection port. The air intake assembly includes an exhaust assembly for drawing external air into the first combustion chamber or the airflow channel. The direction of the gas injection and the direction of the air injection intersect in the second combustion chamber, so that high-temperature air combustion occurs in the second combustion chamber; The combustion body includes a duct plate forming the air injection port; The air duct plate is arranged in a convex arc shape protruding outwards from the second combustion chamber; the part of the air guide plate facing the air injection port is arranged in a concave arc shape concave into the second combustion chamber, so that a space for air to flow in different directions is formed between the air duct plate and the air guide plate. The air duct plate is connected to the air guide plate on its far side away from the gas injection port, and the air duct plate is spaced apart from the air guide plate on its near side near the gas injection port.

2. The burner as claimed in claim 1, characterized in that, The second combustion chamber is provided with an air injection port connected to the air intake assembly and a gas injection port connected to the air intake assembly, wherein the air injection port and the gas injection port are spaced apart. The opening direction of the air injection port is inclined in opposite directions to the opening direction of the gas injection port.

3. The burner as described in claim 1, characterized in that, The second combustion chamber is provided with an air injection port connected to the air intake assembly and a gas injection port connected to the air intake assembly, wherein the air injection port and the gas injection port are spaced apart. The air intake assembly includes an air guide plate disposed at the air injection port, and the air guide plate is set at an angle to the plane where the air injection port is located; The air intake assembly includes an air guide plate disposed at the gas injection port, and the air guide plate is set at an angle to the plane where the gas injection port is located.

4. The burner according to any one of claims 2 to 3, characterized in that, The air injection port is positioned closer to the first combustion chamber than the gas injection port.

5. The burner as described in any one of claims 2 to 3, characterized in that, Multiple air injection ports and / or gas injection ports are spaced apart on the side of the second combustion chamber; Each of the air jets includes a plurality of jet holes arranged in a grid pattern.

6. The burner as claimed in claim 1, characterized in that, The exhaust assembly is located on the side of the second combustion chamber away from the first combustion chamber.

7. The burner as claimed in claim 1, characterized in that, The combustion body includes: A housing, forming the first combustion chamber and the second combustion chamber; and, An atmospheric burner is used to ignite the first combustion chamber to heat the temperature inside the first combustion chamber to a preset temperature.

8. The burner as claimed in claim 7, characterized in that, The intake assembly includes a gas pipeline and a gas proportional valve. The gas pipeline includes a first gas flow channel connected to the atmospheric burner and a second gas flow channel connected to the second combustion chamber. The gas proportional valve is used to adjust the gas flow rate of the first gas flow channel and the second gas flow channel respectively.

9. The burner as claimed in claim 8, characterized in that, The atmospheric burner includes multiple combustion cells, each of which has an airflow passage for the flow of the mixed gas. The air intake assembly also includes a gas distribution bar, through which the first gas flow channel is connected one-to-one with multiple airflow channels of the multiple combustion cells.

10. The burner as claimed in claim 8, characterized in that, Multiple gas injection ports are spaced apart on the side of the second combustion chamber; The air intake assembly also includes an air distribution structure, through which the second gas flow channel is connected to a plurality of gas injection ports in a one-to-one correspondence.

11. The burner as claimed in claim 7, characterized in that, The atmospheric burner includes a combustion unit with an airflow channel, a combustion assembly located at the outlet of the airflow channel, and an ignition device located in the first combustion chamber for igniting the combustion assembly.

12. The burner as claimed in claim 11, characterized in that, The combustion assembly includes a plate-shaped body covering the air outlet of the airflow channel and a plurality of air vents extending through the plate-shaped body along its thickness direction.

13. The burner as claimed in claim 12, characterized in that, The plate-shaped body has two first outer peripheral sides that are arranged opposite to each other; The plate-shaped body is inclined from the two first outer peripheral sides toward its center toward the airflow channel.

14. The burner as claimed in claim 13, characterized in that, The combustion assembly further includes two guide plates protruding from the two first outer peripheral sides of the plate-shaped body, the two guide plates extending in a direction away from each other in the direction protruding from the plate-shaped body.

15. A gas-fired device, characterized in that, It includes a heat exchanger and a burner as described in any one of claims 1 to 14, wherein the heat exchanger produces hot water using the heat generated by the burner.

16. The gas appliance as described in claim 15, characterized in that, The gas equipment also includes a main body, which forms a heat exchange chamber that communicates with the second combustion chamber, and the heat exchange chamber is provided with a flue gas outlet; The exhaust assembly is located at the smoke outlet of the heat exchange chamber.

17. The gas appliance as described in any one of claims 15 to 16, characterized in that, The gas-fired equipment includes gas water heaters or gas wall-hung boilers.

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