CN112682785A - Combustor and gas heater - Google Patents

Abstract

The invention discloses a burner and a gas water heater, wherein the burner comprises a shell, a preheating burner and a turbulence device; the shell is internally provided with a premixing chamber, an air preheating chamber and a combustion chamber which are sequentially communicated, the premixing chamber is provided with an air inlet for accessing air and fuel gas, the air preheating chamber is provided with an air outlet for flowing air into the air preheating chamber, the combustion chamber is provided with a flue gas outlet and a fuel gas outlet, the fuel gas outlet is used for spraying fuel gas into the combustion chamber so as to carry out high-temperature air combustion reaction, the preheating burner is arranged in the air preheating chamber, and the preheating burner is used for igniting mixed gas discharged from the premixing chamber into the air preheating chamber and heating the temperature in the air preheating chamber to a preset temperature; the turbulence device of the turbulence device is rotatably arranged in the premixing chamber to perform turbulence on gas and air entering the premixing chamber. The combustor of the invention ensures that the mixed gas in the premixing chamber is combusted more fully in the preheating combustor, and the emission of CO and NOX in the whole combustion process is greatly reduced.

Description

Combustor and gas heater

The priority of the chinese patent application having application number 201910992986.8 entitled "burner and gas water heater" filed on 17.10.2019, which is hereby incorporated by reference in its entirety.

Technical Field

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

Background

High temperature air combustion (high temperature air combustion) is called MILD and deep low oxygen dilution combustion, and is called a novel combustion mode for short, namely MILD combustion. The main characteristics of the combustion are as follows: the chemical reactions mainly occur in a high-temperature low-oxygen environment, the temperature of reactants is higher than the natural temperature of the reactants, the maximum temperature rise in the combustion process is lower than the natural temperature of the reactants, and the volume fraction of oxygen is diluted to an extremely low concentration by combustion products. Compared with conventional combustion, in the combustion state, the pyrolysis of fuel is inhibited, the flame thickness is thickened, and the flame front surface disappears, so that the temperature of the whole hearth is very uniform during the combustion, and the emission of pollutants NOx and CO is greatly reduced.

Although high temperature air combustion has many of the advantages described above, currently, there is no specialized burner to achieve the high temperature air combustion. In the related art, a premixing chamber is defined in a housing, so that gas and air are mixed in the premixing chamber and then sent to a preheating burner for combustion, and therefore whether the mixed gas in the premixing chamber is uniformly mixed determines whether the combustion in the preheating burner is complete. Thus, there is a need for a burner that can achieve high temperature air combustion while allowing the preheat burner to burn completely.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

Disclosure of Invention

The main object of the present invention is to propose a burner aimed at solving one or more of the technical problems set out above.

In order to achieve the purpose, the burner provided by the invention comprises a shell, a preheating burner and a flow disturbing device;

the air preheating chamber is provided with an air outlet for flowing air into the air preheating chamber, the combustion chamber is provided with a smoke outlet and a gas outlet, and the gas outlet is used for jetting gas into the combustion chamber;

a preheating burner is arranged in the air preheating chamber and is used for igniting the mixed gas discharged from the premixing chamber into the air preheating chamber;

the flow disturbing device is rotatably arranged in the premixing chamber to disturb the gas and the air entering the premixing chamber.

In an embodiment, the vortex device includes vortex piece, axis of rotation and cover and locates rotate epaxial bearing, the vortex piece passes through the axis of rotation reaches the bearing rotationally install in the casing, the vortex piece is located the air inlet with preheat between the combustor.

In one embodiment, the bearing is mounted to the housing, and one end of the rotating shaft is connected to the bearing and the other end is fixedly connected to the spoiler.

In one embodiment, the air inlet is opened on the peripheral wall surface of the premixing chamber.

In an embodiment, the spoiler includes spoiler and the axis of rotation that is connected with spoiler, the combustor still includes drive arrangement, drive arrangement with the axis of rotation is connected to the drive spoiler rotates.

In one embodiment, the spoiler comprises a disc-shaped body; or, the spoiler comprises a plurality of blades which are arranged along the circumferential direction of the premixing chamber at intervals.

In one embodiment, the disk-shaped body is arranged to be divergent towards the side close to the preheating burner.

In one embodiment, the disk-shaped body includes a plurality of concave portions and a plurality of convex portions arranged at intervals along a circumferential direction of the disk-shaped body, and one concave portion is connected between two adjacent convex portions.

In one embodiment, the disc-shaped body is provided with a plurality of turbulence holes, and the plurality of turbulence holes are arranged at intervals along the circumferential direction of the disc-shaped body.

In an embodiment, the disk-shaped body and the inner wall surface of the housing are arranged at an interval, the inner wall surface of the housing is further provided with a baffle ring in a protruding manner, the protruding height of the baffle ring is greater than or equal to the distance between the disk-shaped body and the inner wall surface of the housing, and the baffle ring is located at the downstream of the disk-shaped body in the air outlet direction of the premixing chamber.

In an embodiment, the casing includes a housing and a first cylinder arranged in the housing, the first cylinder defines the combustion chamber therein, a gas distribution chamber is defined between the first cylinder and the housing, the gas distribution chamber has a gas inlet, a gas outlet is communicated with the gas distribution chamber, the gas outlet is multiple, the gas outlet is arranged on a peripheral wall surface of the first cylinder and is arranged at intervals along a circumferential direction of the first cylinder.

In an embodiment, the housing further includes a second cylinder disposed in the casing, the second cylinder defines the air preheating chamber and the premixing chamber therein, an air distribution chamber is defined between the second cylinder and the casing, the air distribution chamber has an air inlet, the air outlet is communicated with the air distribution chamber, the air outlet is multiple, and the air outlets are opened in a peripheral wall surface of the second cylinder and are spaced along a circumferential direction of the second cylinder.

In an embodiment, the premixing chamber, the air preheating chamber and the combustion chamber are sequentially arranged from bottom to top, the gas outlet is arranged at the upper end of the first cylinder, and the gas flow direction of the gas outlet is downward or obliquely downward.

The invention also provides a gas water heater, which comprises a main body, a heat exchanger and a burner, wherein the burner comprises a shell, a preheating burner and a turbulence device;

the shell is internally provided with a premixing chamber, an air preheating chamber and a combustion chamber which are sequentially communicated, the premixing chamber is provided with an air inlet for accessing air and fuel gas, the air preheating chamber is provided with an air outlet communicated with the air distribution chamber, the combustion chamber is provided with a flue gas outlet and a fuel gas outlet, and the fuel gas outlet is communicated with the fuel gas distribution chamber so as to be used for spraying fuel gas into the combustion chamber and enabling the combustion chamber to carry out high-temperature air combustion reaction;

the preheating burner is arranged in the air preheating chamber and is used for igniting the mixed gas discharged from the premixing chamber into the air preheating chamber and heating the temperature in the air preheating chamber to a preset temperature;

the turbulence device is rotatably arranged in the premixing chamber to disturb the fuel gas and air entering the premixing chamber;

the main body is internally provided with a heat exchange chamber and a smoke outlet communicated with the heat exchange chamber, the heat exchanger is arranged in the heat exchange chamber, and a smoke outlet of the combustor is communicated with the heat exchange chamber.

According to the burner, the premixing chamber, the air preheating chamber and the combustion chamber which are sequentially communicated are arranged in the shell, and the rotatable turbulence device is arranged in the premixing chamber, so that air and gas in the premixing chamber are mixed more uniformly, mixed gas in the premixing chamber is combusted more fully in the preheating burner, and low CO and NOX emission in the whole combustion process is ensured. The preheating burner ignites the burning to mist, has realized high temperature preheated air, and the gas export on the rethread combustion chamber sprays the gas and cooperates and produce the entrainment effect for the high temperature flue gas backward flow realizes keeping warm on the one hand, makes the interior gas of combustion chamber can the spontaneous combustion, and on the other hand dilutes the air, makes oxygen concentration be less than a definite value, realizes the homogeneous combustion, so, just makes the interior high temperature air that takes place of combustion chamber burn. The invention realizes a practical burner with high-temperature air combustion function. And, the structure of this kind of combustor frame can be with the subassembly miniaturization that realizes the high temperature air burning for have more application space and value, the noise is low in addition, and the burning is abundant, and it is little to discharge waste gas pollution, when being applied to gas heater and including gas hanging stove etc. use gas burning to produce high temperature hot water and carry out relevant products and equipment that use such as family's shower and heating, not only satisfied the requirement, but also brought the abundant, low pollutant emission's of burning that the combustor did not possess in the current water heater effect. And only set up the gas outlet on the combustion chamber alright realize spraying the gas, simple structure, easily realization, and make the structure of whole combustor compacter, the volume is littleer.

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 structural view of an embodiment of a burner of the present invention;

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

FIG. 3 is a schematic cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic cross-sectional view taken along line C-C of FIG. 4;

FIG. 6 is a schematic structural view of an embodiment of a disk-shaped body of the burner of the present invention.

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

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments 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 a gas water heater, so that the gas water heater can effectively reduce the emission of CO and NOx and reduce the noise of the gas water heater.

The invention provides a burner which is suitable for gas water heaters, and related products and equipment such as gas wall-mounted furnaces and the like which use high-temperature hot water generated by gas combustion for household bathing, heating and the like.

In an embodiment of the present invention, as shown in fig. 1 to 4, the burner 10 includes a housing 100, a preheating burner 200, and a flow disturbing device 300. The casing 100 is formed with a premixing chamber 130, an air preheating chamber 140, and a combustion chamber 150, which are sequentially communicated. The premixing chamber 130 has an air inlet 131 for receiving air and gas, and the air preheating chamber 140 has an air outlet 141 for introducing air thereinto. The combustion chamber 150 has a flue gas outlet 151 and a gas outlet 152, and the gas outlet 152 is used for injecting gas into the combustion chamber 150 so as to perform a high-temperature air combustion reaction in the combustion chamber 150. The preheating burner 200 is installed in the air preheating chamber 140, and the preheating burner 200 is used for igniting the mixed gas discharged from the premixing chamber 130 into the air preheating chamber 140 and heating the temperature in the air preheating chamber 140 to a preset temperature. The turbulator 300 is rotatably disposed in the pre-mixing chamber 130 to turbulate the gas and air entering the pre-mixing chamber 130.

The high-temperature air combustion is mainly characterized in that: the chemical reactions mainly occur in a high-temperature low-oxygen environment, the temperature of reactants is higher than the natural temperature of the reactants, the maximum temperature rise in the combustion process is lower than the natural temperature of the reactants, and the volume fraction of oxygen is diluted to an extremely low concentration by combustion products. Compared with conventional combustion, in the combustion state, the pyrolysis of fuel is inhibited, the flame thickness is thickened, and the flame front surface disappears, so that the temperature of the whole hearth is uniform, the combustion peak temperature is low, the noise is low, and the emission of pollutants NOx and CO is greatly reduced. However, achieving high temperature air combustion requires certain conditions: the oxygen concentration at any position in the furnace is required to be ensured to be lower than a certain value, generally lower than 5% -10%, the fuel gas is ensured to be fully combusted and uniformly combusted, the temperature is higher than the self-ignition point of the fuel, and the self-ignition is maintained.

In this embodiment, the cross-sectional shape of the casing 100 may be rectangular, circular, oval, irregular, and the like, and may be selected and designed according to actual requirements, and is not limited herein. The premixing chamber 130, the air preheating chamber 140 and the combustion chamber 150 may be linearly arranged (the air passing channel is a straight line), or arranged in a turning line (the air passing channel is a broken line), or arranged in a layer-by-layer surrounding manner (the air flow is blown out from the inside to the outside or from the outside to the inside), or the premixing chamber 130, the air preheating chamber 140 and the combustion chamber 150 may be arranged in a combination of a straight line and a surrounding manner, so long as the premixing chamber 130, the air preheating chamber 140 and the combustion chamber 150 are sequentially communicated, which is not limited herein. The cross-sectional shapes of the pre-mixing chamber 130, the air preheating chamber 140, and the combustion chamber 150 may be circular, oval, circular, rectangular, etc., and may be selected and designed according to the actual shape of the casing 100 and the arrangement of the three.

In order to make the combustion more sufficient, the gas entering from the gas inlet 131 is a mixed gas of gas and air mixed by the premixer. The external air first enters the air distribution chamber 110 of the housing 100, and then enters the air preheating chamber 140 through the air outlet 141, and the air flow can be blown into the air distribution chamber 110 by a blower or the like, and then relatively uniformly enters the air preheating chamber 140 through the air outlet 141. It should be noted that the air outlet 141 is disposed at the air outlet end of the preheating burner 200. That is, after the mixed gas in the pre-mixing chamber 130 is combusted by the pre-heating burner 200, the high temperature flue gas enters the air preheating chamber 140, and simultaneously enters the air preheating chamber 140 from the air outlet 141, so that the cold air is mixed with the high temperature flue gas in the air preheating chamber 140, and the cold air is heated. The heated air and high temperature flue gas enter the combustion chamber 150 to heat the combustion chamber 150. In order to sufficiently and uniformly mix the air with the high-temperature flue gas generated during combustion in the air preheating chamber 140, a plurality of air outlets 141 are provided, and the plurality of air outlets 141 are arranged at intervals around the circumferential wall surface of the air preheating chamber 140. The plurality of air outlets 141 can comb the air into a plurality of uniform air streams, which makes the air more sufficiently and uniformly mixed with the high temperature flue gas combusted in the air preheating chamber 140. In order to further stir the cold air and the high temperature flue gas in the air preheating chamber 140, a stirring device may be disposed in the air preheating chamber 140 for sufficiently stirring and mixing the cold air and the high temperature flue gas, so that the air is rapidly and uniformly heated to a preset temperature.

The gas in the gas distribution chamber 120 can be controlled by an external gas valve. It will be appreciated that the gas valve is open to a certain gas pressure to allow gas from the gas distribution chamber 120 to be injected into the combustion chamber 150 from the gas outlet 152. The gas outlet 152 may be an opening formed in the wall surface of the casing 100, or may be an airflow outlet of a gas nozzle or a gas nozzle, so that high-speed jet flow is realized when the gas is ejected from the gas outlet 152 of the gas ejection device. The high-speed ejected gas forms an entrainment effect in the combustion chamber 150, so that an ejection burner and a smoke backflow area are formed in the combustion chamber 150, the high-temperature smoke in the combustion chamber 150 is rapidly and strongly circulated in the combustion chamber 150, the ejected gas and the entering air are fully diluted to form a lower oxygen concentration, the combustion reaction speed is reduced, the higher temperature in the combustion chamber 150 is maintained, the temperature is higher than the spontaneous combustion point of the fuel, and spontaneous combustion is realized. As such, the present embodiment satisfies the condition of high-temperature air combustion (mld combustion): high-temperature preheating air is matched with high-speed jet flow to realize entrainment of high-temperature flue gas and dilution of air jet flow, so that the oxygen concentration is lower than a certain value, and the temperature is higher than the self-ignition point of fuel.

The preheating burner 200 may specifically be a fully premixed burner. The preheating burner 200 may be installed in the air preheating chamber 140, or may be installed at a gas flow port of the premixing chamber 130 and the air preheating chamber 140, and the preheating burner 200 is used to ignite the mixed gas discharged from the premixing chamber 130 to the air preheating chamber 140. Specifically, the burner 10 further includes an ignition device disposed within the housing 100 adjacent the preheat burner 200 for igniting the preheat burner 200. In order to make the combustion uniform, the preheating burner 200 includes a plate-shaped body and a plurality of air holes penetrating through the thickness direction of the plate-shaped body, and the plurality of air holes are used for allowing the mixed gas to pass through and enter the air preheating chamber 140. The plurality of air passing holes can be uniformly or alternatively arranged on the plate-shaped body so as to ensure uniform combustion. The ignition device may be embodied as an electronic igniter or an electric heating wire, so that the power consumption is smaller.

The spoiler 300 may specifically include a spoiler, a spoiler disc, a comb structure, a spoiler blade, and the like. The spoiler 300 may be rotated automatically or driven by a driving means. The turbulence device 300 automatically rotates, that is, the turbulence device 300 realizes small frictional resistance or frictionless contact with the bearing 330 through the rotating shaft, so that after the mixed gas enters the premixing chamber 130 from the air inlet 131, the mixed gas drives the turbulence device 300 to rotate, cut and stir the mixed gas, and the gas and the air are uniformly mixed. In one embodiment, the spoiler 300 includes a spoiler and a rotating shaft 320 connected to the spoiler, and the burner 10 further includes a driving device connected to the rotating shaft 320 to drive the spoiler to rotate. The spoiler is fixedly connected with the rotating shaft 320, and the driving device may be a driving member such as a driving motor capable of driving the rotating shaft 320 to rotate. The output shaft of driving motor is connected with axis of rotation 320, and then drives the vortex piece and rotates to realize cutting and stirring mist, reach the purpose of homogeneous mixing gas and air. When the gas after stirring and mixing through the turbulent flow device 300 enters the preheating burner 200 for burning, the burning is more sufficient, the pollutant discharge amount in the burning process is low, and the noise is low.

When the burner 10 is in operation, the mixed gas is delivered from the air inlet 131 to enter the premixing chamber 130, the turbulence device 300 rotates to enable the gas and the air to be uniformly mixed, the ignition device ignites the preheating burner 200, the high-temperature flue gas after the mixed gas is combusted enters the air preheating chamber 140, meanwhile, the air enters the air preheating chamber 140 from the air distribution chamber 110 through the air outlet 141, and the high-temperature flue gas is mixed with the cold air to heat the cold air. It is understood that the air in the air preheating chamber 140 can be heated to the target temperature, that is, the preset temperature, by controlling the heating temperature, so that the high-temperature preheating of the air is realized. Specifically, the burner 10 further includes a temperature measuring device disposed in the air preheating chamber 140. The temperature measuring device is used for detecting whether the temperature of the gas in the air preheating chamber 140 reaches a target temperature, if not, the temperature in the air preheating chamber 140 needs to be increased, the air inlet volume of the air can be controlled, or the ratio of the gas and the air in the premixing chamber 130 is controlled to realize temperature adjustment. By detecting the temperature, the preheat burner 200 can automatically adjust the heat load according to the amount of air required for MILD combustion to achieve the effect of quickly preheating the air while ensuring low CO and NOx emissions throughout the combustion process. The temperature measuring device may be a temperature sensor. After the air and the high-temperature flue gas subjected to high-temperature preheating are conveyed to the combustion chamber 150, the gas outlet 152 is controlled to spray gas, the gas is contacted with the high-temperature gas, and the high-temperature gas ignites the gas, so that MILD combustion is formed in the combustion chamber 150. The heat after combustion is discharged through the flue gas outlet 151, and then can exchange heat with a heat exchanger of the gas water heater, so as to realize hot water production.

According to the combustor 10, the premixing chamber 130, the air preheating chamber 140 and the combustion chamber 150 are arranged in the shell 100 and are sequentially communicated, and the rotatable flow disturbing device 300 is arranged in the premixing chamber 130, so that air and fuel gas in the premixing chamber 130 are mixed more uniformly, mixed gas in the premixing chamber 130 is combusted more fully in the preheating combustor 200, and low CO and NOx emission in the whole combustion process is ensured. Preheating burner 200 ignites the burning to mist, has realized high temperature preheated air, rethread gas export 152 sprays the gas and cooperates and produce the entrainment effect, make the high temperature flue gas backward flow, realize on the one hand keeping warm and make the temperature be higher than the spontaneous combustion point of fuel, make the interior gas of combustion chamber can the spontaneous combustion, on the other hand is through efflux entrainment dilution air, make oxygen concentration be less than a definite value, realize the homogeneous combustion, so, just make the combustion of taking place high temperature air in the combustion chamber 150. That is to say, the technical scheme of this embodiment is favorable to having reached these two conditions simultaneously, realizes smoothly that high temperature air burns. And, the structure of this kind of combustor frame can be with the subassembly miniaturization that realizes the high temperature air burning for have more application space and value, the noise is low in addition, and the burning is abundant, and it is little to discharge waste gas pollution, when being applied to gas heater and including gas hanging stove etc. use gas burning to produce high temperature hot water and carry out relevant products and equipment that use such as family's shower and heating, not only satisfied the requirement, but also brought the abundant, low pollutant emission's of burning that the combustor did not possess in the current water heater effect. And only set up the gas outlet 152 on the combustion chamber 150 and can realize spraying the gas, simple structure, easy realization, and make the structure of whole combustor 10 compacter, the volume is littleer.

In the above embodiment, in order to better obtain the mixed gas of the gas and the air, the premixer includes a casing, a fan and a gas switch valve, the casing is formed with an air inlet channel, a gas channel and a mixing channel, the mixing channel is respectively communicated with the air inlet channel and the gas channel, the fan is disposed in the air inlet channel, the gas switch valve is disposed in the gas channel, and the mixing channel is communicated with the air inlet 131 of the mixed gas distribution chamber. When the mixed gas is needed, the fan is controlled to work and the gas switch valve is controlled to be opened according to the preset air inlet and gas ratio, so that the mixed gas with a certain gas/air ratio is obtained by mixing in the shell.

In one embodiment, as shown in fig. 3 and 4, the spoiler 300 includes a spoiler, a rotating shaft 320 and a bearing 330 sleeved on the rotating shaft 320, the spoiler is rotatably mounted to the housing 100 through the rotating shaft 320 and the bearing 330, and the spoiler is located between the air inlet 131 and the preheating burner 200.

In this embodiment, the spoiler may be specifically a spoiler, a spoiler disc, a comb-shaped structure, a spoiler blade, or other structures capable of stirring the airflow. This bearing 330 specifically is antifriction bearing 330 to make the frictional resistance between axis of rotation 320 and the bearing 330 little, and then when the air current blows the vortex piece, can realize the rotation of vortex piece, realize cutting and stirring gas and air, in order to further gas mixing. So that the spoiler is located between the air inlet 131 and the preheating burner 200, and the air flow can directly blow to the spoiler after entering the premixing chamber 130 from the air inlet 131, thereby driving the spoiler to rotate with better effect. The air inlet 131 may be opened on the peripheral wall surface or the bottom wall surface of the premixing chamber 130. Through making the vortex piece rotationally install on casing 100 through axis of rotation 320 and bearing 330, then need not set up in addition drive arrangement drive vortex piece and rotate, the automatic rotation of vortex piece is realized to the air current through air inlet 131, simple structure and ingenious, and occupation space is little, and stirring effect is good. It is understood that in other embodiments, the bearing 330 may be replaced by a plurality of circumferentially arranged rolling elements, and in this case, the rolling elements need to be embedded on the casing 100 or the spoiler, so that the rotating shaft 320 drives the spoiler to rotate relative to the casing 100 or the rolling elements drive the spoiler to rotate relative to the casing 100. In order to make the blowing effect of the air flow entering from the air inlet 131 on the spoiler better, the air inlet 131 is opened on the circumferential wall surface of the premixing chamber 130. Then for seting up air inlet 131 in the bottom of premixing chamber 130 for the air current blows to the spoiler from the side, thereby can make the air current to spoiler upward effort of circumference big, and then promotes spoiler pivoted effect better. In other embodiments, the spoiler may also be rotatably mounted to the housing 100 directly via the rotating shaft 320.

Based on the above embodiment, referring to fig. 3 and 4 again, the bearing 330 is installed on the housing 100, one end of the rotating shaft 320 is connected to the bearing 330, and the other end is fixedly connected to the spoiler. Bearing 330 installs on the bearing 330 seat of casing 100, compares in installing the scheme on the vortex piece with bearing 330, can alleviate the weight of vortex piece to make vortex piece more laborsaving in the rotation of air current blowing down, and then improve the rotational speed of vortex piece, improve the air current and mix the effect. Specifically, at least two bearings 330 are provided, and the two bearings 330 are provided at intervals in the extending direction of the rotating shaft 320. It is understood that the housing 100 is configured to have a thickness, double or multi-wall structure, and two or more bearing 330 seats are provided on the housing 100. Through making two or more bearings 330 set up along the extending direction interval of axis of rotation 320, on the one hand make the rotation between axis of rotation 320 and the casing 100 be connected more steadily, prevent that the skew from appearing in axis of rotation 320, and then cause the vortex piece to rotate the circumstances such as not smooth and easy, on the other hand guarantees the operational reliability of vortex piece, in order when one of them bearing 330 became invalid, still can guarantee the free rotation of axis of rotation 320 relative casing 100, thereby make the vortex piece can be under the blowing of air current free rotation cutting and stirring air current all the time.

In another embodiment, the bearing 330 is mounted on the spoiler, and one end of the rotational shaft 320 is fixedly mounted on the housing 100, and the other end is rotatably connected with the spoiler through the bearing 330. Therefore, the spoiler rotates along with the bearing 330 relative to the rotating shaft 320, and the spoiler can freely rotate under the blowing of the air flow, so that the mixed gas is stirred.

In one embodiment, referring to fig. 3 to 6, the spoiler includes a disk 310. It is understood that the disk body 310 may be a disk-shaped structure such as a circular disk, an elliptical disk, a square disk, etc. Make the vortex piece including the disk body 310, then can improve the area of contact of the mist that vortex piece and air inlet 131 got into to the lifting surface area of vortex piece is big, then the vortex piece can be smooth and easy free rotation under the promotion of air current, with cutting and stirring gas. The cross-sectional area of the disk 310 should be smaller than that of the pre-mixing chamber 130 so that the disk 310 can rotate in the pre-mixing chamber 130 without hindrance and the air flow can flow from the gap between the disk 310 and the inner wall surface of the pre-mixing chamber 130 to the air preheating chamber 140.

In practical applications, the disk body 310 is provided with a plurality of turbulence holes 313, and the plurality of turbulence holes 313 are arranged at intervals along the circumferential direction of the disk body 310. The shape of the orifice 313 may be circular, rectangular, irregular, etc. Through set up a plurality of vortex holes 313 on the disk body 310, can effectively alleviate the weight of the disk body 310 on the one hand to reduce air current and promote resistance, on the other hand, vortex hole 313 can increase the route of gas mixture passageway, thereby improves the gas circulation rate, and vortex hole 313 can shunt gas mixture, further improves the mixed effect of gas and air. The turbulence hole 313 may be provided in a plurality of turns, and the plurality of turns of the turbulence hole 313 are spaced from the middle of the disk body 310 toward the periphery. Thus, the turbulence holes 313 are uniformly distributed on the disk-shaped body 310, and the effect of cutting and stirring the air flow is better. At this time, the cross-sectional area of the disk body 310 may be slightly smaller than that of the pre-mixing chamber 130, so as to stir and cut the airflow within the pre-mixing chamber 130 as much as possible.

In order to further improve the mixing effect of the mixed gas, on the basis that the disc-shaped body 310 is provided with the plurality of turbulence holes 313, as shown in fig. 3 and 4, the disc-shaped body 310 is arranged at an interval from the inner wall surface of the casing 100, the inner wall surface of the casing 100 is further provided with the baffle ring 160 in a protruding manner, the protruding height of the baffle ring 160 is greater than or equal to the distance between the disc-shaped body 310 and the inner wall surface of the casing 100, and the baffle ring 160 is positioned at the downstream of the disc-shaped body 310 in the air outlet direction of the premixing chamber 130. The disk body 310 is spaced apart from the inner wall of the housing 100, so that the disk body 310 can rotate smoothly in the pre-mixing chamber 130. If the baffle ring 160 is provided downstream of the disk member 310 and the baffle ring 160 is provided to block the gap between the disk member 310 and the inner wall surface of the housing 100, the gap resistance can be increased when the mixed gas passes through the disk member 310, and the mixed gas can be prevented from escaping from the gap between the disk member 310 and the inner wall surface of the housing 100. Therefore, the air flow entering the premixing chamber 130 from the air inlet 131 passes through the disc-shaped body 310 and passes through the turbulent flow holes 313 of the disc-shaped body 310, the mixed air flow can be combed effectively, the disc-shaped body 310 can cut and stir the mixed air flow passing through the turbulent flow holes 313, and the mixing effect of the gas and the air is further improved.

In other embodiments, the spoiler includes a plurality of blades spaced circumferentially along the premix chamber 130. The number and size of the vanes may be selected and designed according to the size of the cross-sectional area of the pre-mix chamber 130. The blades may specifically be three, four, five, etc. The blades can be arranged at intervals in the circumferential direction, and two adjacent blades can also be arranged in a partially overlapped mode. Through making the vortex piece include a plurality of blades, then the vortex piece is when rotating, equally can cut and stirring gas for gas and air intensive mixing.

Based on the embodiment that the spoiler includes the disk body 310, further, referring to fig. 3 and 4, the disk body 310 is gradually enlarged toward the side close to the preheating burner 200. As such, the disk 310 is generally flared such that the large end of the disk 310 is proximate to the preheat burner 200 and the small end is proximate to the gas inlet 131. The mixed air flow enters the pre-mixing chamber 130 from the air inlet 131, and then directly blows to the outer side of the disk body 310 and expands outward along the wall surface of the disk body 310, so that the effect of pushing the disk body 310 to rotate is better, and the effect of stirring the mixed air flow is better.

In combination with the embodiment that the spoiler includes the disc-shaped body 310, further, as shown in fig. 3, 4 and 6, the disc-shaped body 310 includes a plurality of concave portions 311 and a plurality of convex portions 312 disposed at intervals along the circumferential direction thereof, and a concave portion 311 is connected between two adjacent convex portions 312. In order to further increase the wind receiving area, the disk-shaped body 310 is formed by a plurality of concave portions 311 and convex portions 312 at intervals. Thus, both the inner wall surface and the outer wall surface of the disk-shaped body 310 undulate. By providing the disc-shaped body 310 with the plurality of concave portions 311 and the plurality of convex portions 312 at intervals, the wind receiving area of the disc-shaped body 310 can be increased compared to the disc-shaped body 310 with a flat surface, and the wind receiving direction and the wind receiving angle of the disc-shaped body 310 are increased, so that the effect of driving the disc-shaped body 310 to rotate by the mixed gas is better. On the basis of the embodiment that the disk-shaped body 310 is provided with the turbulence holes 313, the turbulence holes 313 are distributed on the concave part 311 or the convex part 312, so that the disk-shaped body 310 can be ensured to rotate smoothly under the blowing of the mixed gas on the premise that the mixed gas can be circulated.

In an embodiment, referring to fig. 3 and 4 again, the casing 100 includes a housing 170 and a first cylinder 180 disposed in the housing 170, a combustion chamber 150 is defined in the first cylinder 180, a gas distribution chamber 120 is defined between the first cylinder 180 and the housing 170, the gas distribution chamber 120 has a gas inlet 121, a plurality of gas outlets 152 are formed in a peripheral wall surface of the first cylinder 180, and the plurality of gas outlets 152 are spaced apart from each other along a circumferential direction of the first cylinder 180.

In this embodiment, the shape of the housing 170 may be various, and in order to maintain the overall consistency and make the overall structure of the burner 10 more compact, the housing 170 may be disposed in a cylindrical shape as a whole. The gas inlet 121 is connected with a gas inlet pipe, which is communicated with a gas source to input gas. Since the plurality of gas outlets 152 are formed in the circumferential wall surface of the first cylinder 180, gas can be injected from the gas distribution chamber 120 into the combustion chamber 150 through the gas outlets 152, and a high-speed gas jet condition is satisfied. And the plurality of gas injection ports makes the gas in the combustion chamber 150 to be mixed more uniformly, so that the combustion is more slow and sufficient. The gas outlet 152 may be disposed at the upper end of the first cylinder 180, and the outflow direction corresponding to the gas outlet 152 may be downward, or the gas outlet 152 may be disposed at the lower end of the first cylinder 180, and the outflow direction corresponding to the gas outlet 152 may be upward.

Further, the casing 100 further includes a second cylinder 190 disposed in the housing 170, the second cylinder 190 defines an air preheating chamber 140 and a premixing chamber 130 therein, an air distribution chamber 110 is defined between the second cylinder 190 and the housing 170, the air distribution chamber 110 has a plurality of air inlets 111, a plurality of air outlets 141 are provided, and the plurality of air outlets 141 are opened on a circumferential wall surface of the second cylinder 190 and are spaced apart from each other along a circumferential direction of the second cylinder 190. Air inlet 111 is connected with air intake pipe, and air intake pipe and air supply intercommunication, accessible fan etc. input air. Only by arranging the first cylinder 180 and the second cylinder 190 in the housing 170, the gas distribution chamber 120, the air distribution chamber 110, the air preheating chamber 140, the combustion chamber 150 and the premixing chamber 130 can be respectively defined, and the burner 10 has the advantages of simple overall structure, smart design, small volume, small occupied space and attractive appearance.

In addition to the above-described embodiments, as shown in fig. 3 and 4, the premixing chamber 130, the air preheating chamber 140, and the combustion chamber 150 are sequentially arranged from bottom to top, the gas outlet 152 is provided at the upper end of the first cylinder 180, and the gas outlet 152 is provided in an air flow direction downward or obliquely downward. Therefore, the air inlet direction of the whole combustor 10 is from bottom to top, and the air flow characteristics are met, so that the air flow is smoother. The first cylinder 180 is located above the second cylinder 190, and the housing 170 surrounds the first cylinder 180 and the second cylinder 190, so that the overall consistency of the appearance is maintained, and the layout is more compact and reasonable. The gas outlet 152 is arranged at the upper end of the first cylinder 180, and the gas flow of the gas outlet 152 is arranged downwards or obliquely downwards, so that the gas is sprayed downwards from the gas outlet 152, a entrainment effect is formed in the combustion chamber 150, the gas is mixed more uniformly, and the combustion is slower and more sufficient.

Specifically, the upper end of the first cylinder 180 is arranged in a tapered manner from bottom to top. Thus, the upper end of the first cylinder 180 is in a necking arrangement from bottom to top. Then gas outlet 152 sets up when the upper end of first barrel 180 for gas outlet 152 sets up in the slant, and then gas outlet 152 that a plurality of circumference intervals set up all jets the gas downwards towards the middle part slope of air preheating chamber 140, thereby can make the gas mixture in the combustion chamber 150 more even, the burning is more slowly and abundant.

The invention also provides a gas water heater, which comprises a main body, a heat exchanger and a burner 10, wherein a heat exchange chamber and a smoke outlet communicated with the heat exchange chamber are arranged in the main body, the heat exchanger is arranged in the heat exchange chamber, and a smoke outlet 151 of the burner 10 is communicated with the heat exchange chamber. It should be noted that the gas in the gas distribution chamber 120 can be provided through an external gas pipeline, a gas proportional valve is arranged on the gas pipeline for control, and the air in the air distribution chamber 110 is controlled through an independent fan which is independent of the fan of the pre-mixer.

The detailed structure of the burner 10 can refer to the above-mentioned embodiment of the burner 10, and is not described herein again; it can be understood that, because the burner 10 is used in the gas water heater of the present invention, the embodiment of the gas water heater of the present invention includes all technical solutions of all embodiments of the burner 10, and the achieved technical effects are also completely the same, and are not described herein again.

The working principle of the burner 10 of the present invention applied to a gas water heater is explained in conjunction with the above-mentioned embodiment of the burner 10:

the water heater is started, the gas switch valve and the fan of the pre-mixer provide the air and the gas mixed according to a certain proportion to the pre-mixing chamber 130 through the air inlet 131, the air and the gas are stirred by the turbulence device 300 and are fully mixed, the air and the gas are provided to the preheating burner 200, the ignition device ignites the gas, the gas starts to burn in the burning area of the air preheating chamber 140, the fan corresponding to the air distribution chamber 110 also acts to suck the air required by burning, and the cold air blown out from the air outlet 141 and the high-temperature flue gas generated by the burning of the preheating burner 200 are mixed in the air preheating chamber 140 to form the high-temperature flue gas. When the temperature measuring device detects that the temperature of the high-temperature flue gas reaches the temperature required by MILD combustion, the gas valve supplies the gas to the gas distribution chamber 120, the gas required by the MILD combustion is sprayed to the combustion chamber 150 from the gas outlet 152 to be combined with the high-temperature gas, the high-temperature gas ignites the gas, MILD combustion is formed in the combustion chamber 150, and due to the fact that the gas is sprayed through the gas outlet 152, a entrainment effect is formed in the combustion chamber 150, a spraying combustion area and a flue gas backflow area are formed in the combustion chamber 150, a part of the flue gas is intensively circulated in the combustion chamber 150, the sprayed gas and air are fully diluted, low oxygen concentration is formed, the combustion reaction speed is reduced, high temperature of the combustion chamber 150 is maintained, the temperature is higher than the spontaneous combustion point of the fuel, and spontaneous combustion is realized. As such, the present embodiment satisfies the condition of high-temperature air combustion (mld combustion): high-temperature preheating air is matched with high-speed jet flow to realize entrainment of high-temperature flue gas and dilution of air jet flow, so that the oxygen concentration is lower than a certain value, and the temperature is higher than the self-ignition point of fuel. The heat after burning can exchange heat with the heat exchanger of the gas water heater and then be discharged to the outside so as to realize the preparation of hot water.

It can be appreciated that the gas water heater can effectively reduce CO and NOx emissions and reduce noise of the gas water heater due to the use of the burner 10 in the gas water heater.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (14)

1. A burner, comprising:

the gas burner comprises a shell, a gas burner and a gas burner, wherein the shell is provided with a premixing chamber, an air preheating chamber and a combustion chamber which are sequentially communicated, the premixing chamber is provided with an air inlet for accessing air and gas, the air preheating chamber is provided with an air outlet for flowing air into the air preheating chamber, the combustion chamber is provided with a flue gas outlet and a gas outlet, and the gas outlet is used for spraying gas into the combustion chamber so as to enable high-temperature air combustion reaction to be carried out in the combustion chamber;

the preheating burner is arranged in the air preheating chamber and used for igniting the mixed gas discharged from the premixing chamber into the air preheating chamber and heating the temperature in the air preheating chamber to a preset temperature; and

and the turbulence device is rotatably arranged in the premixing chamber to disturb the gas and the air entering the premixing chamber.

2. The burner of claim 1, wherein the turbulator includes a turbulator, a rotational shaft, and a bearing sleeved on the rotational shaft, the turbulator passing through the rotational shaft and the bearing rotatably mounted to the housing, the turbulator being located between the air inlet and the preheat burner.

3. The burner of claim 2, wherein the bearing is mounted to the housing, and the rotating shaft is coupled at one end to the bearing and at the other end to the spoiler.

4. The burner of claim 1, wherein the air inlet opens into a peripheral wall of the premix chamber.

5. The burner of claim 1, wherein the spoiler comprises a spoiler and a rotational shaft coupled to the spoiler, the burner further comprising a driving device coupled to the rotational shaft to drive the spoiler to rotate.

6. The burner of any of claim 1, wherein the spoiler comprises a disk-shaped body; or, the spoiler comprises a plurality of blades which are arranged along the circumferential direction of the premixing chamber at intervals.

7. A burner as claimed in claim 6, wherein said disk-shaped body is divergent to a side adjacent to said preheat burner.

8. The burner of claim 6, wherein the disk-shaped body comprises a plurality of concave portions and a plurality of convex portions arranged at intervals along the circumferential direction of the disk-shaped body, and one concave portion is connected between two adjacent convex portions.

9. The burner of claim 6, wherein the disk-shaped body defines a plurality of baffle holes, the baffle holes being spaced circumferentially around the disk-shaped body.

10. The burner of claim 6, wherein the disk-shaped body is spaced from the inner wall surface of the housing, the inner wall surface of the housing is further provided with a baffle ring in a protruding manner, the protruding height of the baffle ring is greater than or equal to the distance between the disk-shaped body and the inner wall surface of the housing, and the baffle ring is located at the downstream of the disk-shaped body in the air outlet direction of the premixing chamber.

11. The burner of claim 1, wherein the housing comprises a casing and a first cylinder disposed in the casing, the first cylinder defines the combustion chamber therein, a gas distribution chamber is defined between the first cylinder and the casing, the gas distribution chamber has a gas inlet, the gas outlet is communicated with the gas distribution chamber, the gas outlet is plural, and the gas outlets are opened in a peripheral wall surface of the first cylinder and are spaced apart along a circumferential direction of the first cylinder.

12. The burner of claim 11, wherein the housing further comprises a second cylinder disposed in the housing, the second cylinder defining the air preheating chamber and the premixing chamber therein, an air distribution chamber defined between the second cylinder and the housing, the air distribution chamber having an air inlet, the air outlet communicating with the air distribution chamber, the air outlet being plural, the air outlet being open at a peripheral wall surface of the second cylinder and spaced apart along a circumferential direction of the second cylinder.

13. The burner of claim 12, wherein the premixing chamber, the air preheating chamber and the combustion chamber are arranged in sequence from bottom to top, the gas outlet is arranged at the upper end of the first cylinder, and the gas outlet is arranged in a downward or obliquely downward air flow direction.

14. A gas water heater, comprising a main body, a heat exchanger and a burner as claimed in any one of claims 1 to 13, wherein a heat exchange chamber and a smoke outlet communicated with the heat exchange chamber are arranged in the main body, the heat exchanger is arranged in the heat exchange chamber, and a smoke outlet of the burner is communicated with the heat exchange chamber.

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