CN216769410U - Combustor and gas heater - Google Patents

Abstract

The utility model discloses a burner and a gas water heater, wherein the burner comprises: the injection device comprises an injector, a cavity and a guide plate, wherein an injection flow channel is formed in the injector; one side of two opposite sides of the cavity along a first direction is connected with the ejector, the other side of the cavity is provided with a cover body, and a mixing cavity communicated with an air outlet of the ejection flow passage is arranged in the cavity; the guide plate is arranged in the mixing cavity and is opposite to the air outlet of the injection flow channel, and a first air vent is arranged on the guide plate, so that air flow sent out by the injection flow channel is uniformly led to the cover body. According to the combustor provided by the embodiment of the utility model, the uniformity of the airflow can be improved, so that low emission of nitrogen oxides and the like can be realized.

Description

Combustor and gas water heater

Technical Field

The utility model relates to the technical field of gas equipment, in particular to a combustor and a gas water heater.

Background

In a gas water heater product, a burner is a core component, the existing gas water heater burner adopts a fully premixed combustion technology, a shade combustion technology and a water-cooled combustion technology to perform low-nitrogen oxide combustion, and usually adopts a plurality of single-piece combined fire grate structures, the single-piece fire grate structure has poor performance of flue gas discharged by instantaneous combustion due to low combustion intensity (generally 2-3 kW of single-piece thermal load) caused by small thermal load, and has high nitrogen oxide.

SUMMERY OF THE UTILITY MODEL

One object of the present invention is to propose a burner that allows to improve the uniformity of the gas flow, so as to achieve low emissions of nitrogen oxides and the like.

The utility model also aims to provide a gas water heater with the burner.

A burner according to an embodiment of the present invention includes: the injection device comprises an injector, a cavity and a guide plate, wherein an injection flow passage is formed in the injector; one side of two opposite sides of the cavity along a first direction is connected with the ejector, the other side of the cavity is provided with a cover body, and a mixing cavity communicated with an air outlet of the ejection flow passage is arranged in the cavity; the guide plate is arranged in the mixing cavity and is opposite to the air outlet of the injection flow channel, and a first air vent is arranged on the guide plate so that air flow sent out by the injection flow channel is uniformly communicated with the cover body.

According to the combustor provided by the embodiment of the utility model, the uniformity of the airflow can be improved, so that low emission of nitrogen oxides and the like can be realized.

In addition, the burner according to the above embodiment of the present invention may further have the following additional technical features:

optionally, the guide plate includes a shielding portion and an inclined portion, a gap is formed between the shielding portion and the cover body, the shielding portion is opposite to the high-speed air outlet position of the injection flow channel, and the inclined portion is connected to the shielding portion and is inclined toward the cover body.

Optionally, the guide plate separates the injection flow passage from the cover body, and a gap is formed between the guide plate and the cover body.

Optionally, the injection flow channel extends along the second direction, one end of the injection flow channel is connected with the air inlet, an air outlet is formed in one side of the injection flow channel along the first direction, the guide plate is opposite to one end, far away from the air inlet, of the injection flow channel, and the first direction is perpendicular to the second direction.

Optionally, the inner side surface of the injection flow channel, which is far away from one end of the air inlet, is configured into an arc-shaped surface, and the opening of the arc-shaped surface faces the air inlet.

Optionally, the guide plate is disposed adjacent to the cover.

Optionally, the combustor includes a plurality of ejectors that set up side by side along the third direction, the cavity is with a plurality of the ejectors link to each other, be equipped with the baffle in the cavity, the baffle is in separate in the cavity with a plurality of distribution chamber that the ejector corresponds, the one end in distribution chamber with correspond the gas outlet intercommunication of the ejector's the injection runner, just the other end orientation in distribution chamber the lid is given vent to anger.

Optionally, the baffle includes a plurality of water conservancy diversion portions and connects a plurality ofly the embedding part of water conservancy diversion portion, the water conservancy diversion portion with the lid is spaced apart, and is a plurality of the water conservancy diversion portion is respectively with a plurality of the ejector runner of ejector is relative, one side orientation of embedding portion the protruding and the opposite side of lid is formed with the embedded groove, the border embedding of baffle is in the embedded groove.

Optionally, the partition plate is configured into a shape with a U-shaped cross section, a second vent is arranged at the closed end of the partition plate, and a first flange inserted into the air outlet of the injection flow passage is arranged at the edge of the second vent.

Optionally, a positioning groove is formed in the first flanging, and a positioning projection embedded into the positioning groove is arranged on the inner side face of the air outlet of the ejector.

Optionally, the cover body includes a cover plate and a metal mesh, a second flange is provided on the peripheral edge of the other side of the cavity, the metal mesh is supported on the second flange, the cover plate covers the outer side of the metal mesh, a third flange is provided on the peripheral edge of the cover plate, and the third flange clamps the metal mesh and the second flange.

Optionally, a matching hole is formed in one side of the cavity, and a fourth flanging inserted into the air outlet of the injection flow passage is arranged on the edge of the matching hole.

Optionally, a plurality of first air vents are arranged on the guide plate, and the plurality of first air vents have the same size or at least part of the plurality of first air vents have different sizes

The gas water heater comprises the burner.

Drawings

FIG. 1 is a schematic view of a combustor of one embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view of the area circled a in fig. 1.

FIG. 3 is a schematic view of a burner of an embodiment of the present invention in another orientation.

FIG. 4 is a schematic view in another direction of a burner of one embodiment of the present invention, with arrows showing the direction of airflow.

FIG. 5 is a schematic view of the cover plate, the metal mesh, and the guide plate of the burner according to one embodiment of the present invention.

FIG. 6 is a schematic view of a guide plate of a combustor of an embodiment of the present invention.

FIG. 7 is a side view of a guide plate of a combustor of an embodiment of the present invention.

FIG. 8 is a schematic view of a baffle of a combustor in accordance with an embodiment of the present invention.

FIG. 9 is a side view of a baffle of a combustor of an embodiment of the present invention.

FIG. 10 is a schematic view in cross section of a baffle of a combustor of an embodiment of the present invention.

Fig. 11 is a schematic view in another direction of a burner according to another embodiment of the present invention.

Fig. 12 is a schematic view in another direction of a burner according to another embodiment of the present invention.

Fig. 13 is a schematic view of the fitting of the cover plate, the metal mesh and the guide plate of the burner according to another embodiment of the present invention.

FIG. 14 is a schematic view of a guide plate of a burner according to another embodiment of the present invention.

Reference numerals:

the burner 100, the ejector 10, the injection runner 108, the air inlet 101, the air outlet 102, the cavity 20, the mixing chamber 201, the matching hole 202, the cover body 30, the cover plate 31, the metal mesh 32, the guide plate 40, the first vent hole 401, the shielding part 41, the inclined part 42, the flow guide part 402, the embedding part 403, the embedding groove 404, the first flanging 51, the second flanging 52, the third flanging 53, the fourth flanging 54, the partition plate 60 and the second vent hole 601.

Detailed Description

The utility model aims to overcome the defects in the related art, and provides a combustor 100 with a low emission structure, which has a simple and reliable manufacturing process, reduces the combustion intensity due to the fact that the space of a cavity 20 is utilized to the maximum extent, the combustion area is increased, the flame is uniform, the combustion noise is low, the application range is large, the combustion performance is stable, the indexes of smoke emission are better, the emission of carbon monoxide and nitrogen oxide is lower, the appearance size is reduced, and the cost is reduced.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

Referring to fig. 1 to 14, a burner 100 according to an embodiment of the present invention includes: injector 10, chamber 20 and guide plate 40.

The ejector 10 is internally provided with an ejector flow channel 108, one side of two opposite sides of the cavity 20 along the first direction is connected with the ejector 10, the other side of the cavity is provided with a cover body 30, and the cavity 20 is internally provided with a mixing cavity 201 communicated with an air outlet 102 of the ejector flow channel 108; the guide plate 40 is disposed in the mixing chamber 201 and opposite to the air outlet 102 of the injection flow channel 108, and the guide plate 40 is provided with a first air vent 401 so that the air flow sent out by the injection flow channel 108 is uniformly led to the cover 30.

Specifically, the injection flow channel 108 can guide the airflow to enter the cavity 20, so that the airflow is mixed in the cavity 20, when the airflow is introduced into the cavity 20, the jet velocities and the like of the gas injected from the injection flow channel 108 at various positions are not uniform, and when the airflow passes through the guide plate 40, the airflow is homogenized to a certain degree, and the airflow can more uniformly pass through the cover body 30 by arranging the guide plate 40, so that the uniformity of the airflow is effectively improved, and the low emission of nitrogen oxides is realized.

According to the burner 100 provided by the embodiment of the utility model, the uniformity of airflow can be improved, so that low emission of nitrogen oxides and the like can be realized, the burner 100 has the advantages of uniform flame, low combustion noise, wide application range, stable combustion performance, better indexes of smoke emission, lower emission of carbon monoxide and nitrogen oxides, reduced appearance size and reduced cost.

Referring to fig. 3 and 4, in some embodiments of the present invention, the guide plate 40 includes a shielding portion 41 and an inclined portion 42, the shielding portion 41 has a gap with the cover body 30, the shielding portion 41 is opposite to the high-speed air outlet position of the injection flow passage 108, and the inclined portion 42 is connected to the shielding portion 41 and inclined toward the cover body 30. The high-speed air outlet position refers to a position where the flow rate of the output air flow of the air outlet 102 is high, and corresponds to other air outlet positions of the air outlet 102. Specifically, due to the structural design of the ejector 10, the air outlet speeds of the air outlet 102 of the ejector 10 may be different from one another, so that a position with a high air outlet speed and a position with a low air outlet speed may occur, the high-speed air outlet position of the air outlet 102 refers to a position with a high air outlet speed of the air outlet 102, and for the ejectors 10 with different shapes or structures, the high-speed air outlet positions may be different, and the high-speed air outlet position may be determined according to actual design, measurement and other manners. According to the utility model, the shielding part 41 is arranged, so that the high-speed air outlet of the air outlet 102 can be slowed down, the flow velocity of the air flow is averaged, and the air flow can be guided by the inclined part 42, so that the air flow at each position in the cavity 20 is balanced, and the uniformity and the mixing effect of the air flow in the front cavity 20 are effectively improved.

Alternatively, as shown in fig. 11 to 14, the guide plate 40 separates the injection flow passage 108 and the cover body 30, and a gap is provided between the guide plate 40 and the cover body 30. Further improving the uniformity of the airflow. Specifically, when the air flow passes through the guide plate 40 in the process of being sent to the cavity 20 from the air outlet 102 of the injector 10, the air flow is blocked by the guide plate 40 and flows to the cover plate 31 through the first air vent 401 on the guide plate 40, and by arranging the guide plate 40, the air flow to the cover body 30 can be uniform, the uniformity of the air flow to the cover body 30 can be improved, and the emission of nitrogen oxides and carbon monoxide can be reduced.

The guide plate is provided with a plurality of first vent holes, the plurality of first vent holes have the same size or at least some of the plurality of first vent holes have different sizes, and the guide plate can achieve the function of homogenizing the airflow by setting the shape, size, density, and the like of the first vent holes in the guide plate, for example, the size of the first vent hole in the portion of the guide plate opposite to the region where the airflow velocity is high is S1, the size of the first vent hole in the portion of the guide plate opposite to the region where the airflow velocity is low is S2, and S1 can be set to be smaller than S2, but S1 may be set to be larger than S2 in actual situations. Of course, this is only a specific embodiment of the present invention, and is not a limitation to the scope of the present invention, and in the present invention, the flow homogenization can be achieved by the guide plate through the shape, arrangement density, and the like of the first air vents. In addition, the size, shape, density, and the like of the first ventilation holes may be set to be the same in each position on the guide plate.

Optionally, as shown in fig. 3, 4, 11, and 12, the injection flow channel 108 extends along the second direction, and one end of the injection flow channel 108 is connected to the air inlet 101, the air outlet 102 is configured at one side of the injection flow channel 108 along the first direction, the guide plate 40 is opposite to one end of the injection flow channel 108 far away from the air inlet 101, and the first direction is perpendicular to the second direction. That is to say, the airflow may flow along the injection flow channel 108 along the first direction, and after entering the mapping flow channel, the airflow will flow toward the air outlet 102 of the injection flow channel 108, and most of the airflow will flow toward the air outlet 102 after passing through the end of the injection flow channel 108 far from the air inlet 101, at this time, there will be a difference in the flow rate of the airflow sent into the cavity 20 from the injection flow channel 108. In addition, in the utility model, the extending direction of the injection flow channel 108 is perpendicular to the air outlet direction, so that the uniformity of air supply can be improved, air inlet and air outlet are facilitated, the uniformity of air flow is improved, and air supply is facilitated.

In the present invention, the air outlet 102 of the injection flow channel 108 may be a strip shape extending along the second direction.

As shown in fig. 3 and 4, in some embodiments of the present invention, an inner side surface of the injection flow passage 108 at an end away from the air inlet 101 is configured as an arc-shaped surface, and an opening of the arc-shaped surface faces the air inlet 101. Therefore, the airflow can smoothly flow from the second direction to the first direction, and the stability of airflow flow is improved. Wherein, the air current is when circulating along the arcwall face, and the flow, the velocity of flow of the air current of flowing from the border of arcwall face can be great relatively, consequently, can constitute the high-speed position of giving vent to anger here, can set up the baffle 40 here relatively, sets up the baffle 40 and is relative with whole gas outlet 102, all can realize the air current in the homogenization cavity 20 effectively and mix the effect.

Optionally, the guide plate 40 is disposed adjacent to the cover 30.

Optionally, as shown in fig. 1, the burner 100 includes a plurality of injectors 10 arranged side by side along a third direction, the cavity 20 is connected to the plurality of injectors 10, a partition plate 60 is disposed in the cavity 20, the partition plate 60 partitions a plurality of distribution cavities corresponding to the plurality of injectors 10 in the cavity 20, one end of each distribution cavity is communicated with the air outlet 102 of the corresponding injection flow channel 108 of the injector 10, and the other end of each distribution cavity is vented toward the cover 30. Wherein, through setting up a plurality of ejectors 10, can improve the homogeneity of the air current of being sent to in the cavity 20, improve the even combustion effect effectively, and through setting up baffle 60 and structuring the distribution chamber, can further improve the homogeneity of air current.

Optionally, with reference to fig. 1 to 14, the guide plate 40 includes a plurality of flow guiding portions 402 and an embedding portion 403 connecting the plurality of flow guiding portions 402, the flow guiding portions 402 are spaced apart from the cover 30, the plurality of flow guiding portions 402 are respectively opposite to the injection flow passages 108 of the plurality of injectors 10, one side of the embedding portion 403 protrudes toward the cover 30, the other side of the embedding portion 403 is formed with an embedding groove 404, and an edge of the partition plate 60 is embedded in the embedding groove 404. When the insertion portion 403 protrudes toward the cover 30, the insertion portion 403 may abut against a surface of the cover 30, or a predetermined gap may be provided between the insertion portion 403 and the cover 30, wherein the insertion portion 403 may be used as an extension of the partition 60, and an inner space of the cavity 20 is partitioned by cooperation of the insertion portion 403 and the partition 60, so as to achieve facing for improving uniformity of air flow, and the insertion groove 404 may facilitate insertion of the partition 60, and improve stability of the partition 60 and the guide plate 40.

Alternatively, with reference to fig. 8 to 10, the partition plate 60 is configured in a U-shaped cross section, the closed end of the partition plate 60 is provided with a second vent 601, and the edge of the second vent 601 is provided with a first flange 51 inserted into the air outlet 102 of the injection flow channel 108. Therefore, the stability of the partition plate 60 is further improved, the airflow can stably circulate between the injection flow passage 108 and the distribution cavity, and the airflow circulation effect is improved.

Optionally, a positioning groove is formed on the first flanging 51, and a positioning protrusion embedded in the positioning groove is formed on the inner side surface of the air outlet 102 of the ejector 10. Through setting up constant head tank and location lug, can realize the stable cooperation of first turn-ups 51 with ejector 10, make things convenient for the location of baffle 60, ejector 10, optimize the cooperation structure, improve the air flow stability.

Optionally, with reference to fig. 1 and fig. 2, the cover 30 includes a cover plate 31 and a metal mesh 32, a second flange 52 is disposed on a peripheral edge of the other side of the cavity 20, the metal mesh 32 is supported on the second flange 52, the cover plate 31 covers an outer side of the metal mesh 32, and a third flange 53 is disposed on a peripheral edge of the cover plate 31, and the metal mesh 32 and the second flange 52 are clamped by the third flange 53. Through setting up metal mesh 32, can improve the homogeneity of air current effectively for the air current in the cavity 20 can be even send out through lid 30, through setting up second turn-ups 52 and third turn-ups 53, can improve the lid 30 effectively and be connected between the cavity 20, improve the stability of connecting.

Optionally, a matching hole 202 is formed in one side of the cavity 20, and a fourth flange 54 inserted into the air outlet 102 of the injection flow passage 108 is formed on the edge of the matching hole 202. The stability of the connection between the cavity 20 and the injector 10 is further improved.

The gas water heater according to the embodiment of the present invention includes the burner 100 according to the foregoing description.

According to the gas water heater provided by the embodiment of the utility model, through the arrangement of the combustor 100, the uniformity of air flow can be effectively improved, so that low emission of nitrogen oxides and the like is realized, the combustor 100 has the advantages of uniform flame, low combustion noise, large application range, stable combustion performance, better indexes of flue gas emission, lower emission of carbon monoxide and nitrogen oxides, reduced appearance size and reduced cost.

In the utility model, the design of a plurality of horizontal ejectors 10 air inlet structures is adopted, the ejector 10 capacity of the burner 100 is improved, the space of the cavity 20 is utilized to the maximum extent by adopting an integral metal mesh 32 structure on a combustion surface, low-emission water heaters of various specifications can be realized, an airflow guide plate 40 is added at the position of the cavity 20 with higher airflow speed, the combustion is uniform, the performance is stable, and the index of smoke emission is better.

The U-shaped partition plate 60 is arranged in the cavity 20, so that the uniform distribution of the respective intake mixed gas is not influenced, and the sectional combustion can be realized. The utility model has a supporting structure of metal net 32 on the cover plate 31, which can reduce the deformation of the net after heating. The cover plate 31 and the cavity 20 adopt a local buckling structure, so that the connection can be simplified. The AB sheet of the utility model adopts an integral structure, and the processing quantity of parts can be reduced.

In the utility model, the fire grate is provided with the plurality of ejectors 10, the integral combustion capacity can be greatly improved, the structural design of the metal mesh 32 is adopted, the structure is simple, the manufacture is convenient, the cost is low, the adaptability is strong, the emission of nitrogen oxides can be reduced, the heat load can be improved, the quality and the use index of the gas water heater can be improved, the production and use requirements can be met, and the positive significance is realized on the development of various low-emission water heater products.

The burner 100 of the utility model can be suitable for various gas devices, especially suitable for various forced-ventilated type gas water heaters, the utility model adopts a plurality of to inject the air inlet structure and match the burning surface of the whole metal mesh 32 structure, make it utilize the space of cavity 20 to the maximum extent, make the heat load of the whole burner 100 increase, and can improve the adaptability; an airflow guide plate 40 is added at a position (upper left in fig. 3) where the airflow speed of the chamber 20 is fast, so that the combustion is more uniform. The cavity 20 is internally provided with a U-shaped clapboard 60 structure, so that the staged combustion can be realized. A support structure is provided in the cover plate 31, which is connected horizontally and vertically to the wire netting 32. The cover plate 31 and the cavity 20 are provided with a partial buckling structure.

As shown in fig. 1, a burner 100 according to an embodiment of the present disclosure includes an injector 10, a chamber 20, a cover 30, and a guide plate 40. The first direction, the second direction, and the third direction may be perpendicular to each other, where the first direction may be an up-down direction, the second direction may be a front-back direction, and the third direction may be a left-right direction, which is only clear description of the present application based on the drawings of the present application and is not a limitation to the scope of the present invention.

The ejector 10 includes a plurality of ejectors arranged side by side in the left-right direction, and an ejector flow passage 108 is provided in each ejector 10. The cavity 20 is installed above the plurality of ejectors 10, a mixing cavity 201 is defined in the cavity 20, the upper ends of the ejectors 10 are connected with the cavity 20, and the air outlets of the plurality of ejectors 10 are communicated with the mixing cavity 201. The plurality of the ejectors is two or more, and only one ejector 10 can be arranged in the utility model. In the utility model, the gas can enter the injection runner 108 from the gas inlet 101 of the injection runner 108, and flow out from the gas outlet 102 of the injection runner 108 and is sent to the cavity 20, and the injection runner 108 is used for injecting the mixed gas of the gas and the air into the mixing cavity 201. The gas and the air are sufficiently mixed in the mixing chamber 201 and then discharged through the cover 30 above the chamber 20. However, since the flow velocity, flow rate, and the like of the air flow when the air flow is introduced into the mixing chamber 201 are not uniform, the flow velocity in a local area is too large, and the combustion is likely to be incomplete. Therefore, in the present invention, in order to improve the combustion performance, the guide plate 40 is provided, and the guide plate 40 can achieve the homogenization of the air flow in the inner space of the chamber 20, effectively improve the combustion effect, and achieve the low emission of nitrogen oxides. According to combustor 100 of the embodiment of this application, through setting up a plurality of ejectors 10 in order to inject gas and air to cavity 20, can improve the efficiency of injecting the air to mixing chamber 201 in, solved the problem that the primary air intake of combustor 100 among the correlation technique is not enough, gas and air are mixed effectually in mixing chamber 201, and combustor 100's injection ability and injection coefficient are high to the combustion heat intensity and the heat load of combustor 100 have been increased.

The cavity 20 may be formed by bending, and the cavity 20 includes a first side wall, a bottom wall, and a second side wall connected in sequence, where the first side wall and the second side wall are disposed opposite to each other in a third direction (i.e., a left-right direction in the drawing). Therefore, the cavity 20 is simple in structure and convenient to machine, and the machining cost of the cavity 20 can be reduced. Optionally, the cavity 20 further includes two end plates, i.e., a first end plate and a second end plate, oppositely disposed in the second direction (i.e., the front-back direction in the figure), and the first end plate and the second end plate are respectively provided with a mounting through hole corresponding to the position of the first end plate and the second end plate for passing through the cooling pipe. The bottom of the cavity 20 is provided with a matching hole 202, the edge of each matching hole 202 is provided with a fourth flange 54, and the fourth flanges 54 extend into the inner wall of the air outlet 102 of the injector 10 and are connected through spot welding.

The cavity 20 is further provided with a partition plate 60, the partition plate 60 is configured into a U-shaped cross section, the bottom of the partition plate 60 is provided with a second air vent 601, the edge of the second air vent 601 is provided with a first flanging 51, and the first flanging 51 is suitable for being inserted into the air outlet 102 of the injector 10 and connected in a spot welding mode. Wherein, one of every two adjacent ejectors 10 in the left-right direction is connected with baffle 60, and first turn-ups 51 on the baffle 60 are inserted into the gas outlet 102 of the corresponding ejector 10, and the gas outlet 102 of first turn-ups 51, fourth turn-ups 54 and ejector 10 stacks gradually and at least two-layer spot welding connects. The upper edge of the cavity 20 is provided with a second flanging 52 which is bent outwards, the metal net 32 is placed on the second flanging 52, the cover plate 31 covers the outer side of the metal net 32, the peripheral edge of the cover plate 31 is provided with a third flanging 53, the cross section of the cover plate 31 is in a ring shape with a U-shaped section and an opening facing the inner side of the cover plate 31, and the peripheral edge of the cover plate 31 clamps the second flanging 52 and the metal net 32 so as to realize the positioning and installation of the metal net 32. The cover plate 31 is a hollow ring structure or the cover plate 31 is provided with a grid shape.

As shown in fig. 3, 4, 11 and 12, the injection flow channel 108 includes a first section and a second section connected to each other, the first section is disposed along the front-rear direction, and a free end of the first section forms the air inlet 101 of the injection flow channel 108. An included angle is formed between the second section and the first section, and the top of the second section is opened to form the air outlet 102 of the injection flow channel 108. Wherein, the junction of the first section and the second section is in smooth transition. The contained angle between second section and the first section is the acute angle, from this, can further reduce ejector 10 in the ascending size of direction of height, increases the length that draws and penetrates runner 108, improves the mixed effect of air and gas under the prerequisite that reduces ejector 10 size.

Optionally, the maximum dimension of the injection flow passage 108 in the height direction (i.e., the up-down direction in the drawing) is smaller than the maximum dimension thereof in the length direction (i.e., the front-back direction in the drawing). Therefore, the size of the ejector 10 in the height direction can be further reduced, so that the overall height of the burner 100 is reduced, and the application range of the burner 100 is improved.

The guide plate 40 is provided with a plurality of first air vents 401 arranged at intervals, the plurality of first air vents 401 are arranged in a plurality of rows at intervals along the front-rear direction, and each row comprises at least one first air vent 401.

In addition, the combustor 100 may further include a cooling pipe, the cooling pipe is inserted into the installation cavity, and an outer wall surface of the cooling pipe is attached to an inner wall surface of the installation cavity. The cooling tube can include a plurality of end to end body that links to each other in proper order, and every body is worn to locate in the installation cavity that corresponds.

Alternatively, in combination with fig. 5, 6, 13 and 14, the plurality of first air vents on the guide plate in the present invention may have the same size, or the plurality of first air vents on the guide plate may be set to have different sizes, for example, the size of the first air vent on the portion of the guide plate opposite to the high-speed air outlet position of the air outlet is smaller than the size of the air vents at other positions; or the size of the air vent of the part of the guide plate opposite to the high-speed air outlet position of the air outlet is smaller than that of the air vents at other positions. The size of the first air vent on the guide plate may also be provided in a gradual change. For example, the size of the air vent from the part of the guide plate opposite to the high-speed air outlet position of the air outlet to other positions on the guide plate is gradually increased or gradually reduced.

In addition, the plurality of first air vents on the guide plate can have the same density, or the plurality of first air vents on the guide plate can be set to have different densities, for example, the density of the first air vents at the part of the guide plate opposite to the high-speed air outlet position of the air outlet is lower than that of the air vents at other positions; or the density of the air vents on the part of the guide plate opposite to the high-speed air outlet position of the air outlet is less than that of the air vents at other positions. The density of the first air vents on the guide plate may also be arranged in a gradual manner. For example, the density of the air vents from the part of the guide plate opposite to the high-speed air outlet position of the air outlet to other positions on the guide plate is gradually increased or gradually reduced.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (13)

1. A burner, comprising:

the ejector is internally provided with an ejector flow passage;

the mixing cavity is communicated with an air outlet of the injection flow passage;

the guide plate is arranged in the mixing cavity and is opposite to the air outlet of the injection flow channel, and a first air vent is formed in the guide plate so that air flow sent out by the injection flow channel can uniformly lead to the cover body.

2. The burner according to claim 1, wherein the guide plate includes a shielding portion having a gap with the cover body and facing the high-speed gas outlet position of the injection flow passage, and an inclined portion connected to the shielding portion and inclined toward the cover body.

3. The burner of claim 1, wherein the guide plate separates the injection flow passage and the cover with a gap therebetween.

4. The burner according to any one of claims 1 to 3, wherein the injection flow channel extends along a second direction, one end of the injection flow channel is connected with the air inlet, an air outlet is formed in one side of the injection flow channel along a first direction, the guide plate is opposite to one end of the injection flow channel, which is far away from the air inlet, and the first direction is perpendicular to the second direction.

5. The burner according to claim 4, wherein an inner side surface of the injection flow passage at an end thereof remote from the air inlet is configured as an arc-shaped surface, and an opening of the arc-shaped surface faces the air inlet.

6. The burner of claim 1, wherein the guide plate is disposed adjacent the cover.

7. The burner of claim 1, comprising a plurality of injectors arranged side-by-side in a third direction, the chamber being connected to the plurality of injectors,

the cavity is internally provided with a partition plate, the partition plate is used for partitioning a plurality of distribution cavities corresponding to the ejectors in the cavity, one ends of the distribution cavities are communicated with the air outlets of the ejection flow passages of the ejectors, and the other ends of the distribution cavities face the cover body to give out air.

8. The burner according to claim 7, wherein the guide plate comprises a plurality of flow guide portions and an embedding portion connected with the plurality of flow guide portions, the flow guide portions are spaced apart from the cover body and are respectively opposite to the plurality of injection flow passages of the injector, one side of the embedding portion protrudes toward the cover body, an embedding groove is formed in the other side of the embedding portion, and the edge of the partition plate is embedded into the embedding groove.

9. The burner of claim 7, wherein the partition is configured in a U-shaped cross section, the closed end of the partition is provided with a second vent, and the edge of the second vent is provided with a first flange inserted into the air outlet of the injection flow passage.

10. The burner of claim 9, wherein the first flange is provided with a positioning groove, and the inner side surface of the air outlet of the ejector is provided with a positioning lug embedded in the positioning groove.

11. The burner of claim 1, wherein the cover comprises a cover plate and a metal mesh, a second flange is arranged on the periphery of the other side of the cavity, the metal mesh is supported on the second flange, the cover plate covers the outer side of the metal mesh, a third flange is arranged on the periphery of the cover plate, and the third flange clamps the metal mesh and the second flange.

12. The burner of claim 1,

a matching hole is formed in one side of the cavity, and a fourth flanging inserted into an air outlet of the injection flow passage is arranged at the edge of the matching hole; and/or

The guide plate is provided with a plurality of first air vents, and the first air vents are the same in size or at least part of the first air vents are different in size.

13. A gas water heater comprising a burner according to any one of claims 1 to 12.

Images