CN114459030A

CN114459030A - Combustor and gas equipment

Info

Publication number: CN114459030A
Application number: CN202011206936.1A
Authority: CN
Inventors: 钱晓林; 梁泽锋; 曲绍鹤
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2022-05-10

Abstract

The invention discloses a combustor and gas equipment, wherein the combustor comprises a combustion main body, an air inlet assembly and an air inlet assembly, wherein 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 fuel gas into the first combustion chamber and injecting the fuel gas into the second combustion chamber; the air inlet assembly is used for accessing air to the first combustion chamber and injecting air to the second combustion chamber; wherein the injection direction of the fuel gas and the injection direction of the air intersect in the second combustion chamber, so that high-temperature air combustion is performed in the second combustion chamber. The technical scheme provided by the invention can achieve the purpose of high-temperature air combustion in the second combustion chamber.

Description

Combustor and gas equipment

Technical Field

The invention relates to the technical field of high-temperature air combustion, in particular to a combustor and gas equipment.

Background

High temperature air combustion (high temperature air combustion) technology is a MILD combustion mode under low oxygen dilution conditions, also known as MILD combustion. The main combustion characteristics are as follows: low reaction rate, less local heat release, uniform heat flow distribution, low combustion peak temperature, low noise and the like. Because the MILD combustion temperature field is more uniform, the combustion peak temperature is low, the generation of thermal nitrogen oxides is reduced, and compared with a common combustion mode, the emission of pollutants NOx and CO can be greatly reduced.

Although high temperature air combustion has many of the advantages described above, it is currently an industrial application and is not used in everyday life.

Disclosure of Invention

The invention mainly aims to provide a combustor with a high-temperature air combustion function and gas equipment.

To achieve the above object, the present invention provides a burner comprising:

the combustion body is formed with a first combustion chamber and a second combustion chamber which are sequentially communicated, and the combustion body is ignited in the first combustion chamber so as to heat the temperature in the first combustion chamber to a preset temperature;

the gas inlet assembly is used for connecting gas to the first combustion chamber and injecting gas to the second combustion chamber; and the number of the first and second groups,

the air inlet assembly is used for accessing air to the first combustion chamber and injecting air to the second combustion chamber;

wherein the injection direction of the fuel gas and the injection direction of the air intersect in the second combustion chamber, so that high-temperature air combustion is performed in the second combustion chamber.

In one embodiment, the second combustion chamber is provided with an air injection port communicated with the air inlet assembly and a gas injection port communicated with the air inlet assembly, and the air injection port and the gas injection port are arranged at intervals;

the opening direction of the air jet and the opening direction of the gas jet are oppositely and obliquely arranged.

the air inlet assembly comprises an air deflector arranged at the air jet orifice, and the air deflector and the plane of the air jet orifice are arranged at an included angle; and/or the presence of a gas in the gas,

the air inlet assembly comprises an air deflector arranged at the position of the fuel gas jet orifice, and the air deflector and the plane of the fuel gas jet orifice form an included angle.

In one embodiment, the air injection port has a proximal side proximate the gas injection port and a distal side distal from the gas injection port;

the air deflector extends proximally from a distal side of the air ejection opening to be spaced apart from a proximal side of the air ejection opening.

In one embodiment, the combustion body includes an air duct plate forming the air injection port;

the air duct plate is arranged in a convex cambered surface shape protruding towards the outside of the second combustion chamber; and/or the presence of a gas in the gas,

the part of the air deflector, which is opposite to the air jet orifice, is arranged in a concave arc surface shape which is sunken towards the second combustion chamber.

In one embodiment, the air injection port is disposed closer to the first combustion chamber than the gas injection port.

In one embodiment, the air injection port and/or the gas injection port are/is arranged in plurality at intervals at the side part of the second combustion chamber;

each air jet opening comprises a plurality of jet holes distributed in a grid shape.

In one embodiment, the air intake assembly comprises an air draft assembly, and the air draft assembly is arranged on one side of the second combustion chamber far away from the first combustion chamber.

In one embodiment, the combustion body comprises:

a housing forming the first combustion chamber and the second combustion chamber; and the number of the first and second groups,

the atmospheric burner is used for igniting in the first combustion chamber so as to heat the temperature in the first combustion chamber to a preset temperature.

In one embodiment, the air intake assembly includes a gas pipeline and a gas proportional valve, the gas pipeline includes a first gas flow channel communicated with the atmospheric burner and a second gas flow channel communicated with the second combustion chamber, and the gas proportional valve is used for respectively regulating gas flow rates of the first gas flow channel and the second gas flow channel.

In one embodiment, the atmospheric burner comprises a plurality of combustion units, each of which has a gas flow channel for circulating a mixed gas;

the air inlet assembly further comprises an air distributing rod, and the first fuel gas flow channel is communicated with the plurality of single combustion gas flow channels in a one-to-one correspondence mode through the air distributing rod.

In one embodiment, the gas injection port is arranged on the side of the second combustion chamber at intervals;

the air inlet assembly further comprises an air distribution structure, and the second fuel gas flow channel is communicated with the plurality of fuel gas jet openings in a one-to-one correspondence mode through the air distribution structure.

In one embodiment, the atmospheric burner comprises a combustion unit formed with an airflow channel, a combustion assembly arranged at an air outlet of the airflow channel, and an ignition device arranged in the first combustion chamber and used for igniting the combustion assembly.

In one embodiment, the combustion assembly includes a plate-shaped body covering the air outlet of the air flow channel, and a plurality of air vents penetrating through the plate-shaped body in a thickness direction thereof.

In one embodiment, the plate-shaped body has two first outer peripheral sides which are oppositely arranged;

the plate-shaped body is gradually inclined towards the airflow channel from the two first outer peripheral sides to the center of the plate-shaped body.

In one embodiment, the combustion assembly further includes two guide plates respectively protruding at two first outer peripheral sides of the plate-like body, the two guide plates extending in directions away from each other in a direction protruding from the plate-like body.

In addition, the invention also provides gas equipment which comprises a heat exchanger and the combustor, wherein the heat exchanger is used for preparing hot water through heat generated by the combustor.

In one embodiment, the gas equipment further comprises a main body, the main body is provided with a heat exchange chamber communicated with the second combustion chamber, and the heat exchange chamber is provided with a smoke outlet;

the first air draft assembly is arranged at a smoke exhaust port of the heat exchange chamber.

In an embodiment, the gas appliance comprises a gas water heater or a gas wall-hanging stove.

In the technical scheme provided by the invention, the gas provided by the gas inlet assembly sucks primary air to the first combustion chamber and ignites the primary air; the air inlet assembly is connected with secondary air, and the secondary air is combusted in the first combustion chamber to generate high-temperature flue gas; the fuel gas provided by the air inlet assembly and the air provided by the air inlet assembly are intersected in a jet flow in the second combustion chamber, so that the mixed gas is matched with the high-temperature flue gas to generate a entrainment effect, the high-temperature flue gas flows back, the heat preservation effect can be realized on the second combustion chamber, the temperature in the second combustion chamber is higher than the spontaneous combustion point of the fuel, and the spontaneous combustion of the fuel is realized; and dilution air can be sucked by jet flow, so that the oxygen concentration in the second combustion chamber is lower than a certain value, uniform combustion is realized, and the aim of high-temperature air combustion is fulfilled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic front view of an embodiment of a combustor provided by the present invention;

FIG. 2 is a schematic longitudinal sectional view of the burner of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic front view of a portion of the second combustion chamber of FIG. 1;

FIG. 5 is a perspective view of a portion of the second combustion chamber of FIG. 1.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to design a novel burner by utilizing the combustion characteristic of high-temperature air and apply the novel burner to gas equipment, so that the gas equipment can effectively reduce the emission of CO and NOx and reduce the noise of the gas equipment.

The invention provides a burner which is applied to gas equipment and related products and equipment such as a gas wall-mounted boiler and the like which are used for household bathing, heating and the like by using high-temperature hot water generated by gas combustion. Fig. 1 to 5 show an embodiment of a burner according to the present invention.

Referring to fig. 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, wherein the combustion body is formed with a first combustion chamber 101 and a second combustion chamber 102 which are sequentially communicated, and the combustion body is ignited in the first combustion chamber 101 to heat the temperature in the first combustion chamber 101 to a predetermined temperature; the air intake assembly 120 is used for introducing gas into the first combustion chamber 101 and injecting gas into the second combustion chamber 102; the air intake assembly 130 is used for introducing air into the first combustion chamber 101 and injecting air into the second combustion chamber 102; wherein the injection direction of the gas and the injection direction of the air intersect in the second combustion chamber 102, so that high-temperature air combustion is performed in the second combustion chamber 102.

In the technical scheme provided by the invention, the gas provided by the gas inlet component 120 sucks primary air to the first combustion chamber 101 and ignites the primary air; the air inlet assembly 130 is connected with secondary air, and the primary combustion chamber 101 combusts to generate high-temperature flue gas; the gas provided by the gas inlet component 120 and the air provided by the air inlet component 130 are crossed in a jet flow in the second combustion chamber 102, so that the mixed gas and the high-temperature flue gas are matched to generate a entrainment effect, the high-temperature flue gas flows back, a heat preservation effect can be realized on the second combustion chamber 102, the temperature in the second combustion chamber 102 is higher than the spontaneous combustion point of the fuel, and the spontaneous combustion of the fuel is realized; and dilution air can be sucked through jet flow, so that the oxygen concentration in the second combustion chamber 102 is lower than a certain value, uniform combustion is realized, and the purpose of high-temperature air combustion is achieved.

The specific expression of the combustion body is not limited in the present design, but for the sake 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 for igniting in the first combustion chamber 101 to heat the temperature in the first combustion chamber 101 to a preset temperature.

It is understood that the atmospheric burner 110 includes a combustion unit 111, the combustion unit 111 has a gas flow channel for the combustion gas to pass through, in a specific application, the combustion unit 111 can be accommodated in the first combustion chamber 101, and the gas flow channel of the combustion unit 111 is communicated with the first combustion chamber 101. The air intake assembly 120 provides the gas to the atmospheric burner 110, and when the gas directly enters the gas flow channel or enters the gas flow channel through the first combustion chamber 101, the gas sucks part of the primary air in the indoor environment or in the first combustion chamber 101, and sufficient mixed gas is formed in the gas flow channel, so that the combustion unit 111 can be ignited.

The air intake assembly 130 includes an air extraction assembly. The convulsions subassembly realizes sucking the outside air to first combustion chamber 101 or airflow channel in to the circulation of air accelerates, makes the monomer 111 of burning obtain more and lasting secondary air, realizes the continuous burning of the monomer 111 of burning, can heat the temperature in the first combustion chamber 101 to preset temperature, realizes high temperature preheated air.

The air 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 direction of the gas and the injection direction of the air are intersected in the second combustion chamber 102, the gas and the air are intersected and mixed in the second combustion chamber 102. The injected fuel gas and air cooperate with the high-temperature preheated air in the second combustion chamber 102 to generate entrainment effect, so that the high-temperature flue gas continuously flows back in the second combustion chamber 102. The circulating reflux of the high-temperature flue gas can play a role in heat preservation of the second combustion chamber 102, so that the temperature in the second combustion chamber 102 is higher than the spontaneous combustion point of the fuel, and the spontaneous combustion of the fuel is realized; the circulation reflux of the high-temperature flue gas can also entrain and dilute air through jet flow, so that the oxygen concentration in the second combustion chamber 102 is lower than a certain value, uniform combustion is realized, and the purpose of high-temperature air combustion is achieved.

It should be noted that, the structure of the above-mentioned burner frame can miniaturize the components for realizing high-temperature air combustion, so that more application space and value are provided, the noise is low, the combustion is sufficient, the pollution of the discharged waste gas is small, when the burner frame is applied to a gas water heater and related products and equipment which are used for household bathing, heating and the like by using high-temperature hot water generated by gas combustion including a gas wall-mounted furnace and the like, the requirements are met, and the effects of sufficient combustion and low pollutant discharge which are not provided by the burner in the existing water heater are also brought.

It can be understood that the target temperature of the high-temperature preheated air cannot be too low, and cannot be lower than 600 ℃, and generally, the target temperature is controlled to be 600-1200 ℃, so that when the high-temperature gas contacts with the fuel gas in the combustion chamber, better automatic combustion is realized, and ignition are not needed any more. The scheme for implementing high-temperature preheating of air can be various, and can be implemented by controlling the heating time, controlling the ratio of fuel gas to air, performing heat preservation, increasing the residence time of high-temperature gas in the second combustion chamber 102, and the like.

In the above description, the oxygen concentration in the second combustion chamber 102 needs to be lower than a certain value, and specifically, may be set to be lower than 5% to 10%. The oxygen concentration in the second combustion chamber 102 can be realized by adjusting the ratio of the fuel gas to the air in the premixer, for example, under the condition of a certain fuel gas amount, the oxygen concentration in the second combustion chamber 102 can be adjusted by adjusting the real-time intake air amount in the second combustion chamber 102, so as to realize the control of the ratio of the fuel gas to the air. The magnitude of the oxygen concentration in the second combustion chamber 102 may be controlled based on the size of the second combustion chamber 102 and the rate of control injection.

In one embodiment, the second combustion chamber 102 is provided with an air injection port 103 communicated with the air intake assembly 130 and a gas injection port 104 communicated with the air intake assembly 120, and the air injection port 103 and the gas injection port 104 are arranged at intervals; the opening direction of the air injection port 103 and the opening direction of the gas injection port 104 are inclined to each other. The casing 100 includes two air duct plates 100a that form the air injection port 103 and the gas injection port 104, respectively, and the two air duct plates 100a are disposed at an included angle, whereby the opening direction of the air injection port 103 and the opening direction of the gas injection port 104 can be inclined in the opposite direction.

Referring to fig. 4 to 5, in an embodiment, similarly to the above, the second combustion chamber 102 is provided with an air injection port 103 communicated with the air intake assembly 130 and a gas injection port 104 communicated with the air intake assembly 120, and the air injection port 103 and the gas injection port 104 are arranged at intervals; the air intake assembly 130 comprises an air deflector 140 arranged at the air injection port 103, and the air deflector 140 and the plane of the air injection port 103 form an included angle. The air deflector 140 guides the air injected into the second combustion chamber 102 through the air injection port 103, so that the air can be obliquely injected towards the direction of the gas injection port 104 along the oblique direction of the air deflector 140, the intersection of the gas and the air in the second combustion chamber 102 is realized, and the high-temperature flue gas is sucked and enhanced to flow back.

Of course, the air deflector 140 may also be disposed 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 may be obliquely injected toward the air injection port 103 along the oblique direction of the air deflector 140, thereby achieving intersection of the gas and the air in the second combustion chamber 102; alternatively, the air guide plate 140 may be provided with two corresponding to the gas injection ports 104 and the air injection ports 103, and guide the air and the gas injected into the second combustion chamber 102 to realize the intersection of the jets of the two in the second combustion chamber 102.

Specifically, in one embodiment, the air injection port 103 has a proximal side proximate to the gas injection port 104 and a distal side distal from the gas injection port 104; the air deflector 140 extends proximally from the distal side of the air ejection opening 103 to be spaced proximally from the air ejection opening 103. The air deflector 140 is disposed to form an inclined guide surface so that when the air is injected from the air injection port 103 into the second combustion chamber 102, the air is first blocked by the air deflector 140 in the direction of the inclined extension of the air deflector 140, that is, in the direction of the gas injection port 104; on the other hand can form a passageway, and the area of crossing of this passageway is gradually big setting along the air current flow direction, realizes the certain degree diffusion of air, when crossing with the gas of injection, changes in the flash mixed of gas and air more.

In one embodiment, the combustion body includes an air duct plate 100a forming the air injection port 103; the air duct plate 100a is arranged in a convex arc surface shape protruding outward of the second combustion chamber 102; and/or, the part of the air deflector 140 facing the air injection port 103 is arranged in a concave arc shape which is concave towards the inside of the second combustion chamber 102. With such arrangement, a sufficient space is formed between the air duct plate 100a and the air deflector 140 for the air to flow in a direction-changing manner, thereby avoiding the occurrence of air backflow caused by too narrow space.

The arrangement positions of the air injection ports 103 and the gas injection ports 104 are not limited in the present design, but alternatively, in an embodiment, the air injection ports 103 are disposed closer to the first combustion chamber 101 than the gas injection ports 104. The arrangement is such that the air is injected to intersect with the gas in the direction away from the first combustion chamber 101, thereby avoiding interference with the combustion of the atmospheric burner 110 in the first combustion chamber 101 due to too close to the first combustion chamber 101.

The air injection ports 103 and/or the gas injection ports 104 are provided in plural numbers at intervals on the side of the second combustion chamber 102, and the specific number, distance and arrangement are not limited in this design. Each of the air injection ports 103 includes a plurality of injection holes arranged in a grid pattern to achieve uniform dispersion and merging of air, and to facilitate mixing of air and fuel gas in the second combustion chamber 102.

The extraction assembly may be located at a suitable location on the first 101 or second 102 combustion chambers. In one embodiment, the air extraction assembly is disposed on a side of the second combustion chamber 102 away from the first combustion chamber 101. Specifically, the second combustion chamber 102 is generally provided with a flue gas outlet, and the flue gas outlet is generally communicated with the heat exchange chamber 200, and is used for discharging high-temperature flue gas, which flows back in the second combustion chamber 102, to the heat exchange chamber 200, and exchanging heat with tap water passing through the heat exchange chamber 200, so as to obtain hot water. The air draft assembly is arranged at the smoke outlet of the second combustion chamber 102, so that when the air draft assembly works, external air can be sucked into the air flow channel, required secondary air is supplemented to the atmospheric burner 110, and meanwhile, the air draft assembly can drive high-temperature smoke of the second combustion chamber 102 to be discharged into the heat exchange chamber 200, and the heat exchange effect is improved.

Further, in one embodiment, when the air extracting assembly is operated, the extracted air circulates in a first direction in the first combustion chamber 101; the atmospheric burner 110 includes a combustion unit 111 disposed in the first combustion chamber 101, and the combustion unit 111 has an airflow passage through which a mixed gas flows, the airflow passage being disposed to penetrate in the first direction. The direction of the airflow channel is consistent with the flowing direction of the sucked air, so that on one hand, the wind resistance of the sucked air can be reduced, and more air flows through the airflow channel in unit time, which is beneficial to improving the supplementing efficiency of secondary air; on the other hand can reduce the circulation that burning monomer 111 formed the barrier to the suction air to avoid suction air and burning monomer 111 surface to bump, help the amortization to fall and make an uproar.

In one embodiment, the air intake assembly 120 includes a gas pipe 121 and a gas proportional valve 122, the gas pipe 121 includes a first gas flow channel 123 communicating with the atmospheric burner 110 and a second gas flow channel 124 communicating with the second combustion chamber 102, and the gas proportional valve 122 is configured to adjust gas flow rates of the first gas flow channel 123 and the second gas flow channel 124 respectively. An air inlet of the gas pipeline 121 is used for being communicated with a gas source, an air outlet of the gas pipeline 121 is respectively communicated with the first gas flow channel 123 and the second gas flow channel 124, and the gas proportional valve 122 can adjust respective gas flows of the first gas flow channel 123 and the second gas flow channel 124, so that the gas amounts in the atmospheric burner 110 and the second combustion chamber 102 can be adjusted, and the adjustment and control of the gas-air ratio can be realized.

In one embodiment, the atmospheric burner 110 includes a plurality of combustion units 111, each of the combustion units 111 having a gas flow passage for flowing a mixed gas; the air intake assembly 120 further includes a gas distributing rod 125, and the first gas flow channel 123 is in one-to-one correspondence with the plurality of gas flow channels of the plurality of combustion units 111 through the gas distributing rod 125. Through the arrangement of the gas distributing rod 125, the first gas pipeline 121 can simultaneously provide approximately equivalent gas for the plurality of combustion units 111, so that the combustion effects of the plurality of combustion units 111 are substantially the same.

Taking the gas injection port 104 as an example, the gas injection port 104 is provided in plurality at intervals on a side portion of the second combustion chamber 102. The specific arrangement mode of the plurality of gas injection ports 104 is not limited, and in specific application, the plurality of gas injection ports 104 can be arranged at intervals along the circumferential direction of the second combustion chamber 102, so that high-speed jet flow can be performed on high-temperature flue gas in the second combustion chamber 102 from multiple directions, and the circulating reflux of the high-temperature flue gas is enhanced; or after the plurality of fuel gas injection ports 104 form one injection port group, at least two injection port groups are arranged on two opposite sides of the second combustion chamber 102, so that the gas flows are injected in opposite directions to intensify the convection of the flue gas in the second combustion chamber 102.

The opening orientation of each of the plurality of gas injection ports 104 is also not limited. The opening orientations of the plurality of gas injection ports 104 may be arranged in the same manner or at least partially differently according to actual needs. In one embodiment, when the plurality of gas injection ports 104 are arranged at intervals along the circumferential direction of the second combustion chamber 102, the openings of all the gas injection ports 104 may be arranged to face the central axis of the second combustion chamber 102; alternatively, all the gas injection ports 104 may be obliquely arranged along the same side of the second combustion chamber 102 in the circumferential direction, so that the gas flow injected from the plurality of gas injection ports 104 is in a spiral shape, and thus the high-temperature flue gas which flows back after being sucked is in a substantially spiral shape, which is beneficial to extending the return path of the high-temperature flue gas, enhancing the circulating and returning effect of the flue gas in the second combustion chamber 102, and realizing good heat preservation in the second combustion chamber 102.

The air intake assembly 120 further includes an air distribution structure 126, and the second fuel gas flow channel 124 is in one-to-one correspondence communication with the plurality of fuel gas injection ports 104 through the air distribution structure 126, so as to achieve synchronous and homogeneous jet flow of the plurality of injection ports.

Referring to fig. 1 to 3, in an embodiment, the atmospheric burner 110 includes a combustion unit 111 having an airflow channel, a combustion assembly 112 disposed at an air outlet of the airflow channel, and an ignition device disposed in the first combustion chamber 101 and configured to ignite the combustion assembly 112. The combustion assembly 112 is disposed at the air outlet of the airflow channel, so that after the air and the gas are substantially mixed in the airflow channel, the air and the gas are ignited by the ignition device at the combustion assembly 112, and continuous and uniform combustion is realized.

The specific expression of the combustion assembly 112 is not limited in this design, and in one embodiment, the combustion assembly 112 includes a plate-shaped body 112a covering the air outlet of the air flow channel, and a plurality of air vents 112b penetrating in the thickness direction of the plate-shaped body 112 a. The plurality of air vents 112b can allow the mixed gas to pass through and realize the uniform distribution of the mixed gas on the plate surface of the plate-shaped body 112a, thereby facilitating the uniform combustion of the mixed gas.

For convenience of understanding, the outer periphery side of the plate-like body 112a to the center of the plate-like body 112a is defined from the outside to the inside. Furthermore, a connecting plate section is formed by protruding from the outer periphery of the plate-shaped body 112a and toward the direction of the air flow channel, and the connecting plate section extends along the circumferential direction of the plate-shaped body 112a to improve the covering effect of the plate-shaped body 112a on the air outlet of the air flow channel.

Then, in an embodiment, the plate-shaped body 112a is inclined from outside to inside in a direction gradually facing the airflow channel, so that a concave structure recessed toward the airflow channel is formed in the middle of the plate-shaped body 112a, and the concave structure can play a certain role in guiding and gathering the mixed gas flowing out from the airflow channel, thereby preventing the mixed gas from being influenced by the external airflow to diffuse and influence the combustion effect.

Specifically, referring to fig. 4, in an embodiment, the plate-shaped body 112a has two first outer peripheral sides disposed oppositely; the plate-shaped body 112a is inclined from the two first outer peripheral sides to the center in a direction gradually toward the gas flow channel, and a V-shaped structure is formed, so that the structure of the plate-shaped body 112a is simplified while the mixed gas is gathered to a certain extent, and the processing and molding are easy.

Further, in an embodiment, the combustion assembly 112 further includes two guide plates 112c respectively protruding from two first outer peripheral sides of the plate-shaped body 112a, and the two guide plates 112c extend in directions away from each other in a direction protruding from the plate-shaped body 112 a. The guide plate 112c is arranged to block interference of external airflow on the combustion flame at the plate-shaped body 112a, so that stable combustion is ensured; on the other hand, the mixed gas can be gathered together with the obliquely arranged plate-shaped body 112a to form a conical flame.

It is understood that the guide plate 112c may be disposed as an inclined straight plate, or may be disposed as an arc surface with gradually changing radian, so as to reduce obstruction and interference to the air flow.

In one embodiment, the guide plate 112c has an air supply opening extending therethrough in a thickness direction thereof. The air supply port is used for supplying certain air to the combustion flame at the plate-shaped body 112a, so that better and more stable combustion is realized. The air supply port may be provided in one or more.

In the above description, the arrangement of the plurality of air vents 112b on the plate-like body 112a and the arrangement of the plurality of air replenishment vents on the guide plate 112c are not limited. The description will be given by taking an example in which the plurality of air vents 112b are arranged on the plate-like body 112a, and the plurality of air vents 112b may be arranged on the plate-like body 112a in a random dispersed manner, in an array, in a radial pattern, in a grid pattern, or the like. The arrangement of the plurality of air supply ports on the guide plate 112c is similar, and will not be described in detail. The specific size and shape of the air vent 112b and the air supplement port are not limited, and can be set according to specific requirements.

In addition, the invention also provides a gas device, which can be a gas water heater or a gas wall-mounted furnace, and comprises a heat exchanger and the burner as described above, and of course, the gas device also comprises a main structure, wherein the main structure is internally provided with a heat exchange chamber 200 and a smoke outlet communicated with the heat exchanger, the heat exchanger is arranged in the heat exchange, the burner is provided with a smoke outlet, and the smoke outlet of the burner is communicated 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 flue gas outlet of the burner carries enough heat to continuously exchange heat with the water in the heat exchanger, so that the temperature of the water is increased to be required, and hot water is prepared. The air draft assembly is arranged at the smoke exhaust port of the heat exchange chamber 200.

It can be understood that the heat exchanger includes the heat exchange tube, and the heat exchange tube passes through heat transfer chamber 200, and the outside water source of one end intercommunication of heat exchange tube, the other end are used for supplying the user to use for when combustor work and convulsions subassembly during operation, the flue gas that the burning produced in the combustion chamber gets into heat transfer chamber 200 in, heat the running water through the heat-conduction between heat exchange tube and the high temperature flue gas, thereby finally make hot water. The specific arrangement manner of the heat exchange tube in the heat exchange chamber 200 is not limited, and for example, the heat exchange tube may be bent for multiple times and then arranged inside the heat exchange chamber 200, or wound around the periphery of the heat exchange chamber 200.

It should be noted that, the detailed structure of the burner in the gas appliance may refer to the above-mentioned embodiment of the burner, and is not described herein again; because the burner is used in the gas equipment, the embodiment of the gas equipment comprises all technical schemes of all embodiments of the burner, and the achieved technical effects are completely the same, which are not described again.

Claims

1. A burner, comprising:

2. The burner of claim 1, wherein the second combustion chamber is provided with an air injection port in communication with the air intake assembly and a gas injection port in communication with the air intake assembly, the air injection port and the gas injection port being spaced apart;

3. The burner of claim 1, wherein the second combustion chamber is provided with an air injection port in communication with the air intake assembly and a gas injection port in communication with the air intake assembly, the air injection port and the gas injection port being spaced apart;

4. The burner of claim 3, wherein the air injection port has a proximal side proximate the gas injection port and a distal side distal from the gas injection port;

5. The burner of claim 4, wherein the combustion body includes an air duct plate forming the air injection port;

6. The burner of any of claims 2 to 5, wherein the air injection port is disposed closer to the first combustion chamber than the gas injection port.

7. The burner as claimed in any one of claims 2 to 5, wherein the air injection port and/or the gas injection port are provided in plurality at intervals at a side of the second combustion chamber;

8. The burner of claim 1, wherein the air intake assembly comprises an air extraction assembly disposed on a side of the second combustion chamber remote from the first combustion chamber.

9. The burner of claim 1, wherein the combustion body comprises:

10. The burner of claim 9, wherein the intake assembly includes a gas conduit including a first gas flow passage in communication with the atmospheric burner and a second gas flow passage in communication with the second combustion chamber, and a gas proportioning valve for regulating gas flow rates of the first and second gas flow passages, respectively.

11. The burner of claim 10, wherein said atmospheric burner comprises a plurality of combustion cells, each of said combustion cells having a gas flow passage for the passage of a gas mixture;

12. The burner of claim 10, wherein said gas injection ports are spaced a plurality of times laterally of said second combustion chamber;

13. The burner of claim 9, wherein the atmospheric burner comprises a combustion unit formed with an air flow channel, a combustion assembly disposed at an air outlet of the air flow channel, and an ignition device disposed in the first combustion chamber for igniting the combustion assembly.

14. The burner of claim 13, wherein the burner assembly includes a plate-shaped body covering the air outlet of the air flow channel, and a plurality of air vents provided through the plate-shaped body in a thickness direction thereof.

15. The burner of claim 14, wherein the plate-like body has two first outer peripheral sides disposed in opposition;

16. The burner of claim 15, wherein said burner assembly further comprises two guide plates respectively projecting at two of said first outer peripheral sides of said plate-like body, said two guide plates extending in directions away from each other in a direction projecting from said plate-like body.

17. A gas-fired appliance comprising a heat exchanger and a burner as claimed in any one of claims 1 to 16, the heat exchanger producing hot water from heat generated by the burner.

18. The gas-fired device as recited in claim 17, further comprising a main body formed with a heat exchange chamber communicating with said second combustion chamber, said heat exchange chamber being provided with a smoke exhaust;

the air draft assembly is arranged at the smoke exhaust port of the heat exchange chamber.

19. Gas appliance according to any of the claims 17 to 18, characterized in that it comprises a gas water heater or a gas wall-hanging stove.