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, an air inlet assembly and a premixer. 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 second combustion chamber has a flue gas outlet. The air inlet assembly is used for connecting the gas. The air inlet assembly is used for connecting the air for the first combustion chamber. The premixer forms a mixing cavity. The mixing cavity is communicated with the air inlet assembly and the flue gas outlet respectively and mixes, and sprays the mixed gas to the second combustion chamber, so that the high-temperature air combustion is carried out in the second combustion chamber. In the application, the air inlet assembly provides the gas to suck the primary air to the first combustion chamber and ignite. The air inlet assembly sucks the secondary air, and the combustion main body burns to generate the high-temperature flue gas. After the premixer mixes the gas and the flue gas of the flue gas outlet, the mixed gas is sprayed to the second combustion chamber, the suction effect is generated, and the purpose of the high-temperature air combustion is achieved.

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. The second combustion chamber has a flue gas outlet.

[0007] An intake assembly is used to access fuel gas, and the intake assembly is connected to the first combustion chamber;

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

[0009] The premixer has a mixing chamber that is connected to and mixes with the air intake assembly and the flue gas outlet, and injects the mixed gas into the second combustion chamber so that high-temperature air combustion occurs in the second combustion chamber.

[0010] In one embodiment, the premixer includes a housing forming the mixing chamber and a return pipe connected to the mixing chamber and the flue gas outlet, respectively.

[0011] In one embodiment, a plurality of injection ports are spaced apart on the side of the second combustion chamber;

[0012] The premixer also includes a gas distribution structure, and the mixing chamber is connected to a plurality of injection ports one by one through the gas distribution structure.

[0013] In one embodiment, the gas distribution structure has a gas distribution chamber, which includes a first chamber and a second chamber connected in sequence. The air inlet of the first chamber is connected to the mixing chamber, and the air outlet of the second chamber is connected to the second combustion chamber.

[0014] The second chamber is arranged to gradually expand along the gas flow direction.

[0015] In one embodiment, the gas distribution structure is provided in two locations corresponding to opposite sides of the second combustion chamber;

[0016] The mixing chamber is connected to the two gas distribution structures respectively.

[0017] In one embodiment, the air intake assembly includes an exhaust assembly located at the flue gas outlet.

[0018] In one embodiment, the combustion body includes:

[0019] A housing, forming the first combustion chamber and the second combustion chamber; and,

[0020] An atmospheric burner is used to ignite the first combustion chamber to heat the temperature inside the first combustion chamber to a preset temperature.

[0021] In one embodiment, when the exhaust assembly is in operation, the air drawn in flows in a first direction within the first combustion chamber;

[0022] The atmospheric burner includes a combustion unit disposed in the first combustion chamber, the combustion unit having an airflow channel for circulating the mixed gas, the airflow channel being disposed through the first direction.

[0023] 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.

[0024] 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.

[0025] In one embodiment, the plate-like body has two first peripheral sides disposed opposite to each other;

[0026] The plate-shaped body is inclined from the two first outer peripheral sides toward its center toward the airflow channel.

[0027] 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.

[0028] In one embodiment, the guide plate has an air inlet extending through it along its thickness direction.

[0029] In one embodiment, the plurality of vents are arranged in a grid pattern on the plate-like body; and / or,

[0030] The air inlet is provided in multiple ways, and the multiple air inlets are arranged in a grid pattern on the guide plate.

[0031] In one embodiment, the burner further includes a control device and a flame sensing device. The control device is electrically connected to the flame sensing device and the first exhaust assembly to control the first exhaust assembly to operate when the flame sensing device senses that the combustion body is ignited.

[0032] In one embodiment, the atmospheric burner includes a plurality of combustion cells, each combustion cell having an airflow passage for circulating a gas mixture;

[0033] The air intake assembly includes a gas pipeline and a gas distribution bar. The gas pipeline is connected to multiple airflow channels of the multiple combustion cells one-to-one through the gas distribution bar.

[0034] In one embodiment, the intake assembly includes a gas pipeline and a gas proportional valve. The gas pipeline includes two gas flow channels, one of which is connected to the first combustion chamber and the other is connected to the premixer. The gas proportional valve is used to adjust the gas flow rate of each of the gas flow channels.

[0035] In addition, to achieve the above objectives, the present invention also provides 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.

[0036] 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;

[0037] The exhaust assembly is located at the exhaust port of the heat exchange chamber, and the premixer is connected to the exhaust port of the heat exchange chamber.

[0038] In one embodiment, the gas appliance includes a gas water heater or a gas wall-hung boiler.

[0039] In the technical solution provided by this invention, the gas supplied by the intake assembly entrains primary air into the first combustion chamber and ignites it; the air intake assembly draws in secondary air, and the combustion body burns to generate high-temperature flue gas; the premixer mixes the gas supplied by the intake assembly and the flue gas returning from the flue gas outlet, and then injects the mixed gas into the second combustion chamber so that the mixed gas and the high-temperature flue gas can work together to produce an entrainment effect, causing the high-temperature flue gas to return. This not only keeps the second combustion chamber warm, making the temperature inside the second combustion chamber higher than the auto-ignition point of the fuel, thus achieving auto-ignition of the fuel, but also dilutes the air through jet entrainment, making the oxygen concentration in the second combustion chamber lower than a certain value, achieving uniform combustion and achieving the purpose of high-temperature air combustion. Attached Figure Description

[0040] 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.

[0041] Figure 1 A front view schematic diagram of an embodiment of the burner provided by the present invention;

[0042] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0043] Figure 3 for Figure 1 Schematic diagram of the longitudinal section of the burner;

[0044] Figure 4 for Figure 3 Enlarged diagram of point B in the middle.

[0045] Explanation of icon numbers:

[0046] label name label name 100 case 122 Gas distribution bar 101 First combustion chamber 123 Gas proportional valve 102 Second combustion chamber 124 Gas flow channel 110 Atmospheric burner 130 Air intake components 111 Combustion unit 140 premixer 112 Combustion components 141 Mixing chamber 112a plate body 142 Return pipe 112b Vent 150 Gas distribution structure 112c Guide plate 151 First chamber 112d Intake port 152 Second chamber 120 Intake components 200 heat exchange chamber 121 Gas pipeline

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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 4 An embodiment of the burner provided by the present invention.

[0051] Please see Figures 1 to 4 The burner provided by the present invention includes a combustion body, an air intake assembly 120, an air intake assembly 130, and a premixer 140. The combustion body forms a first combustion chamber 101 and a second combustion chamber 102 connected sequentially. The combustion body is used to ignite the gas in the first combustion chamber 101 to heat the temperature inside the first combustion chamber 101 to a preset temperature. The second combustion chamber 102 has a flue gas outlet. The air intake assembly 120 is used to supply fuel gas and is connected to the first combustion chamber 101. The air intake assembly 130 is used to supply air to the first combustion chamber 101. The premixer 140 forms a mixing chamber 141, which is connected to and mixes the gas with the air intake assembly 120 and the flue gas outlet, and injects the mixed gas into the second combustion chamber 102 to achieve high-temperature air combustion in the second combustion chamber 102.

[0052] 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 draws in secondary air, and the combustion body burns to generate high-temperature flue gas; the premixer 140 mixes the gas supplied by the intake assembly 120 and the flue gas returning from the flue gas outlet, and then injects the mixed gas into the second combustion chamber 102 so that the mixed gas and the high-temperature flue gas can work together to produce an entrainment effect, so that the high-temperature flue gas can return, which can not only keep the second combustion chamber 102 warm, so that the temperature inside the second combustion chamber 102 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 jet entrainment, so that the oxygen concentration inside the second combustion chamber 102 is lower than a certain value, thus achieving uniform combustion and achieving the purpose of high-temperature air combustion.

[0053] 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.

[0054] 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.

[0055] Next, the air intake assembly 130 includes an exhaust assembly, which draws external 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.

[0056] The premixer 140 receives external combustion gas and flue gas returning from the flue gas outlet, and mixes them thoroughly to form a mixed gas before injecting the mixed gas into the second combustion chamber 102. Specifically, the premixer 140 can be configured to include a nozzle connected to the second combustion chamber 102. By reducing the flow area from the premixer 140 body structure to the nozzle, or by increasing the pressure provided by the premixer 140 body structure to the nozzle, the purpose of injecting the mixed gas into the second combustion chamber 102 can be achieved, thus realizing a high-speed jet.

[0057] After the mixed gas is injected into the second combustion chamber 102, it interacts with the high-temperature preheated air inside the second combustion chamber 102 to produce an entrainment effect, causing the high-temperature flue gas to continuously circulate within the second combustion chamber 102. This circulating circulation of high-temperature flue gas helps to keep the second combustion chamber 102 warm, ensuring that the temperature inside the second combustion chamber 102 is higher than the fuel's auto-ignition point, thus achieving auto-ignition. Furthermore, the circulating circulation of high-temperature flue gas can dilute the air through jet entrainment, lowering the oxygen concentration in the second combustion chamber 102 below a certain value, achieving uniform combustion and realizing the purpose of high-temperature air combustion.

[0058] 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.

[0059] 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.

[0060] 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 140. 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.

[0061] To achieve the recirculation of flue gas from the flue gas outlet back to the mixing chamber 141, in one embodiment, the premixer 140 includes a shell forming the mixing chamber 141 and a return pipe 142 connected to both the mixing chamber 141 and the flue gas outlet. The flue gas discharged from the outlet includes a portion of air. This flue gas flows back to the mixing chamber 141 via the return pipe 142, where it mixes with the fuel gas supplied by the intake assembly 120 to form a mixed gas. This mixed gas is then injected into the second combustion chamber 102, forming a high-speed jet. This facilitates the rational recovery and utilization of residual flue gas, achieving resource reuse.

[0062] 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.

[0063] 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.

[0064] As described above, 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 and then ignited by the ignition device at the combustion assembly 112, achieving continuous and uniform combustion.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In one embodiment, the guide plate 112c has an air supply port 112d extending along its thickness direction. The air supply port 112d is used to supply a certain amount of air to the combustion flame at the plate-shaped body 112a, thereby achieving better and more stable combustion. There may be one or more air supply ports 112d.

[0072] The arrangement of the multiple vents 112b on the plate-shaped body 112a and the arrangement of the multiple air inlets 112d 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 112d 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 112d are also not limited and can be set according to specific needs.

[0073] In one embodiment, the burner further includes a control device and a flame sensing device. The control device is electrically connected to the flame sensing device and the exhaust assembly to control the exhaust assembly to operate when the flame sensing device detects that the combustion element is ignited. The flame sensing device detects the flame of the combustion element to determine whether the atmospheric burner 110 is in a combustion state. The control device can be an independent control unit separate from the inherent control system of the gas equipment, or it can be a simple modification of the inherent control system of the gas equipment. When the air intake assembly 120 supplies gas to the atmospheric burner 110, the gas entrains some primary air, causing the atmospheric burner 110 to ignite and produce a combustion flame. When the flame sensing device detects the combustion flame, it sends a signal to the control device, which then controls the exhaust assembly to operate, ensuring that secondary air is promptly supplied under the action of the exhaust assembly, achieving continuous combustion in the atmospheric burner 110 and preheating the high-temperature air.

[0074] Both the atmospheric burner 110 and the premixer 140 require gas supply. In one embodiment, a gas source can be provided for the atmospheric burner 110 and the premixer 140 respectively, and a regulating valve can be provided for the atmospheric burner 110 and the premixer 140 respectively. By adjusting the opening of the two regulating valves respectively, the gas flow of the atmospheric burner 110 and the premixer 140 can be controlled.

[0075] Alternatively, in another embodiment, the air intake assembly 120 includes a gas pipeline 121 and a gas proportional valve 123. The gas pipeline 121 includes two gas flow channels 124, one of which is connected to the first combustion chamber 101, and the other is connected to the premixer 140. The gas proportional valve 123 is used to adjust the gas flow rate of each of the gas flow channels 124. 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 two gas flow channels 124 respectively. The gas proportional valve 123 can adjust the gas flow rate of each of the two gas flow channels 124, so that the amount of gas in the atmospheric burner 110 and the premixer 140 is adjustable, thereby achieving an adjustable and controllable ratio of gas to air.

[0076] Next, in one embodiment, a plurality of injection ports are spaced apart on the side of the second combustion chamber 102;

[0077] When the premixer 140 also includes a nozzle, it can be configured to install the nozzle at the injection port, or the nozzle can be configured to directly form the injection port at the connection between the nozzle and the second combustion chamber 102.

[0078] The specific arrangement of the multiple injection ports is not limited. In specific applications, the multiple injection ports can be arranged at intervals along the circumferential direction of the second combustion chamber 102, so as to provide high-speed jets of high-temperature flue gas in the second combustion chamber 102 from multiple directions and enhance the circulation and recirculation of high-temperature flue gas; or, after several injection ports 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 sprayed towards each other and the flue gas convection in the second combustion chamber 102 is intensified.

[0079] The opening orientation of each of the multiple injection ports is not limited. Depending on actual needs, the opening orientations of the multiple injection ports can be the same or at least partially different. In one embodiment, when the multiple injection ports are spaced apart along the circumferential direction of the second combustion chamber 102, the opening orientation of all injection ports can be set to face the central axis of the second combustion chamber 102; alternatively, all injection ports 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 injection ports is vortex-shaped. This makes the high-temperature flue gas that is entrained and recirculated approximately vortex-shaped, which helps to extend the recirculation path of the high-temperature flue gas, enhance the circulation and recirculation effect of the flue gas in the second combustion chamber 102, and achieve good heat preservation within the second combustion chamber 102.

[0080] In view of the above, the burner further includes a gas distribution structure 150, through which the mixing channel is connected to a plurality of injection ports in a one-to-one correspondence, thereby achieving synchronous and homogeneous jets from the multiple injection ports.

[0081] Further, in one embodiment, the gas distribution chamber includes a first chamber 151 and a second chamber 152 connected in sequence. The inlet of the first chamber 151 is connected to the premixer 140, and the outlet of the second chamber 152 is connected to the second combustion chamber 102. The second chamber 152 is gradually expanded along the gas flow direction. It can be understood that the flow area of ​​the first chamber 151 is smaller than that of the second chamber 152, which helps to accelerate the airflow velocity entering the gas distribution chamber from the premixer 140. The gradual expansion of the second chamber 152 along the gas flow direction, i.e., the gradually increasing flow area along the gas flow direction, allows the mixed gas to gradually slow down and disperse during its flow within the second chamber 152, which is beneficial for the uniform and stable mixing gas ejected from each nozzle.

[0082] Among the multiple injection ports, several injection ports can form an injection port group. At least two injection port groups are arranged on opposite sides of the second combustion chamber 102. Taking two injection port groups as an example, the gas distribution structure 150 is provided on opposite sides of the second combustion chamber 102. The premixer 140 is connected to the two gas distribution structures 150 respectively through a connecting pipe, so as to realize the purpose of the same premixer 140 simultaneously providing mixed gas to the two gas distribution structures 150, ensuring that the mixed gas injected from each injection port is approximately the same.

[0083] The atmospheric burner 110 includes multiple combustion cells 111, each combustion cell 111 having an airflow channel for circulating a gas mixture. The air intake assembly 120 includes a gas pipe 121 and a gas distributor 122. The gas pipe 121 is connected to the multiple airflow channels of the multiple combustion cells 111 one-to-one through the gas distributor 122. The gas distributor 122 allows the same gas pipe 121 to simultaneously provide approximately equal amounts of gas to multiple combustion cells 111, resulting in essentially identical combustion effects for the multiple combustion cells 111.

[0084] 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 its 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, and the premixer 140 is connected to the flue gas outlet of the heat exchange chamber 200.

[0085] 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.

[0086] 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 by The application relates to a high-temperature air combustion device. The device comprises: a combustion main body, which is formed with a first combustion chamber and a second combustion chamber in sequence and is used for ignition in the first combustion chamber to heat the temperature in the first combustion chamber to a preset temperature, and the second combustion chamber is provided with a flue gas outlet; an air inlet assembly, which is used for air inlet and is communicated with the first combustion chamber; an air inlet assembly, which is used for air inlet for the first combustion chamber; a premixer, which is formed with a mixing cavity, the mixing cavity is communicated with the air inlet assembly and the flue gas outlet respectively and mixes, and sprays mixed gas to the second combustion chamber to make high-temperature air combustion in the second combustion chamber; a plurality of spray ports are arranged on the side of the second combustion chamber, all the spray ports are arranged on the same side of the circumferential direction of the second combustion chamber, and the gas flow sprayed by the plurality of spray ports is in a vortex shape, the premixer further comprises a gas distribution structure, the mixing cavity is communicated with the plurality of spray ports one by one through the gas distribution structure; the premixer comprises an outer shell forming the mixing cavity and a return pipeline communicated with the mixing cavity and the flue gas outlet respectively.

2. The burner of claim 1, wherein The gas distribution structure is provided with a gas distribution cavity, the gas distribution cavity comprises a first chamber and a second chamber in sequence, the air inlet of the first chamber is communicated with the mixing cavity, and the air outlet of the second chamber is communicated with the second combustion chamber; wherein the second chamber is arranged in a gradually expanding manner along the gas flow direction.

3. The burner of claim 2, wherein The gas distribution structure is provided with two on the opposite sides of the second combustion chamber; the mixing cavity is communicated with the two gas distribution structures respectively.

4. The burner of claim 1, wherein The air inlet assembly comprises an air suction assembly arranged at the flue gas outlet.

5. The burner of claim 4, wherein The combustion main body comprises: a shell forming the first combustion chamber and the second combustion chamber; and an atmospheric burner used for ignition in the first combustion chamber to heat the temperature in the first combustion chamber to a preset temperature.

6. The burner of claim 5, wherein When the air suction assembly works, the suctioned air flows in the first combustion chamber along a first direction; The atmospheric burner comprises a combustion monomer arranged in the first combustion chamber, the combustion monomer is provided with a gas flow channel for flowing mixed gas, and the gas flow channel is arranged in a penetrating manner along the first direction.

7. The burner of claim 5, wherein The atmospheric burner comprises a combustion monomer forming a gas flow channel, a combustion assembly arranged at the air outlet of the gas flow channel, and an ignition device arranged in the first combustion chamber and used for igniting the combustion assembly.

8. The burner of claim 7, wherein The combustion assembly comprises a plate-shaped body arranged at the air outlet of the gas flow channel, and a plurality of air vents arranged in a penetrating manner along the thickness direction of the plate-shaped body.

9. The burner of claim 8, wherein The plate-shaped body has two first outer circumferential sides arranged oppositely; The plate-shaped body is arranged in a gradually inclined manner from the two first outer circumferential sides to the center of the plate-shaped body towards the gas flow channel.

10. The burner of claim 9, wherein The combustion assembly further comprises two guide plates protruding from the two first outer circumferential sides of the plate-shaped body, and the two guide plates extend in a direction away from each other in the direction protruding from the plate-shaped body.

11. The burner of claim 10, wherein The guide plate is provided with a gas supplement port in the thickness direction.

12. The burner of claim 11, wherein The plurality of air vents are arranged in a grid shape on the plate-shaped body; and / or, The plurality of air supplementing ports are arranged in a grid shape on the guide plate.

13. The burner of claim 4, wherein The burner further comprises a control device and a flame sensing device, the control device being electrically connected to the flame sensing device and the air suction assembly, so as to control the air suction assembly to work when the flame sensing device senses that the combustion main body is ignited.

14. The burner of claim 5, wherein The atmospheric burner comprises a plurality of combustion units, each of which has a gas flow channel for flowing mixed gas; The air inlet assembly comprises a gas pipeline and a gas distribution rod, the gas pipeline being in one-to-one correspondence with the plurality of gas flow channels of the plurality of combustion units through the gas distribution rod.

15. The burner of claim 1, wherein The air inlet assembly comprises a gas pipeline and a gas proportional valve, the gas pipeline comprising two gas flow channels, one of which is in communication with the first combustion chamber, and the other of which is in communication with the premixer, and the gas proportional valve is used to adjust the gas flow of each gas flow channel.

16. A gas appliance characterised in that, The gas equipment further comprises a main body, the main body being formed with a heat exchange chamber in communication with the second combustion chamber, and the heat exchange chamber being provided with a smoke exhaust port.

17. The gas appliance of claim 16, wherein, The air suction assembly of the air inlet assembly is arranged at the smoke exhaust port of the heat exchange chamber. The gas equipment comprises a gas water heater or a gas wall-hanging stove.

18. Gas appliance according to any of claims 16 to 17, characterized in that ​

Images