CN218095931U - Burner for gas water heater and gas water heater - Google Patents

Abstract

The utility model belongs to the technical field of gas heater, a combustor and gas heater for gas heater is specifically provided. The utility model discloses aim at solving current gas heater's the inhomogeneous problem of combustor burning. The utility model comprises a burner body, a stable combustion rectification and flame orifice plate, wherein the burner body is provided with an air inlet and an air outlet; the combustion stabilizing rectifying plate is arranged at the air outlet and provided with a left area, a middle area and a right area, the left area is provided with a left rectifying hole group, the middle area is provided with a middle rectifying hole group, and the right area is provided with a right rectifying hole group; the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group are used for uniformly distributing gas in the combustor body to the gas outlet; the flame orifice plate is arranged on the upper side of the combustion stabilizing flow plate and is used for receiving the gas distributed by the combustion stabilizing flow plate. The utility model discloses improve the burning operating mode of current combustor, promoted the combustion performance of combustor.

Description

Burner for gas water heater and gas water heater

Technical Field

The utility model belongs to the technical field of gas heater, a combustor and gas heater for gas heater is specifically provided.

Background

At present, most of gas water heaters in the market adopt an atmospheric burner in a partially premixed combustion mode, which is also called a fire grate. The high-speed flowing gas is ejected from the distributor, the air is ejected into the combustor chamber and mixed with the gas, and the gas is decelerated and divided by the mixing chamber to flow into a firework hole of the combustor and is ignited.

When the atmospheric burner is subjected to changes of gas quality, air pressure, altitude and the like, the combustion condition of the atmospheric burner is unstable, poor combustion conditions such as backfire, flame leaving, flame extinction and yellow flame are easy to occur, and the emission of pollutants such as CO, nitrogen oxides and the like can be increased due to the flame leaving, yellow flame and flame extinction. The backfire of the gas can damage the head of the burner, and the service life of the water heater is influenced. The instability of the gas combustion condition can also cause combustion noise to be generated in the use process of the water heater, the local water temperature is influenced to be too high, and the bathing experience of a user is influenced from the aspects of noise and constant temperature.

Therefore, there is a need for a structure that enables the burner to burn sufficiently and uniformly to increase the service life of the gas water heater, thereby increasing the user experience.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the inhomogeneous problem of combustor burning of current gas heater.

In order to achieve the above object, the present invention provides a burner for a gas water heater, including:

the combustor comprises a combustor body, wherein an air inlet and an air outlet are formed in the combustor body;

the gas outlet is provided with a gas inlet, the gas inlet is provided with a gas inlet hole group, the gas outlet hole group is arranged in the gas inlet hole group, the gas inlet hole group is arranged in the gas inlet hole group, and the gas outlet hole group is arranged in the gas outlet hole group; the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group are used for uniformly distributing gas in the combustor body to the gas outlet;

the flame orifice plate is arranged on the upper side of the combustion stabilizing flow plate and is used for receiving the gas distributed by the combustion stabilizing flow plate.

Further, the burner body comprises a main injection port and an auxiliary injection port, and the main injection port and the auxiliary injection port are both positioned on one side of the combustion stabilizing rectifying plate away from the gas outlet;

the main ejection port is aligned with a right portion of the middle region and the right region;

the sub ejection port is aligned with a left portion of the middle region and the left region.

Further, the area ratio of the left region, the middle region, and the right region is 2.

Further, the area ratio of the left set of commutation holes, the middle set of commutation holes and the right set of commutation holes is 3.

Further, the left rectifying hole group comprises a plurality of first left rectifying holes, a plurality of second left rectifying holes and a plurality of third left rectifying holes which are distributed from left to right in sequence, wherein the cross section area of the rectifying holes in the second left rectifying holes is the largest, the cross section area of the first left rectifying holes is the second largest, and the cross section area of the rectifying holes in the third left rectifying holes is the smallest; and the interval between the second left rectifying holes is larger than the interval between the first left rectifying holes and is larger than the interval between the third left rectifying holes.

Further, the intermediate fairing hole group comprises a plurality of intermediate fairing holes, and the intervals and the hole diameters of the intermediate fairing holes are the same.

Further, the right rectifying hole group comprises a plurality of first right rectifying holes, a plurality of second right rectifying holes and a plurality of third right rectifying holes which are distributed from left to right in sequence, and the areas of the first right rectifying holes, the second right rectifying holes and the third right rectifying holes are reduced in sequence; and the intervals among the first right-side rectifying hole, the second right-side rectifying hole and the third right-side rectifying hole are reduced in sequence.

Further, the widths of the rectifying holes corresponding to the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group are the same.

Further, the burner body further comprises: a housing comprising a first housing and a second housing; the injection passage is formed in the shell, an injector is accommodated in the injection passage, and one end of the injection passage is communicated with the air inlet; the mixing cavity is formed in the shell, the other end of the ejector channel is communicated with the mixing cavity, the mixing cavity is communicated with the main jet orifice and the auxiliary jet orifice, and the mixing cavity is used for fully mixing the gas ejected from the ejector with air.

Further, the mixing chamber comprises a primary mixing chamber and a secondary mixing chamber; the main mixing cavity is C-shaped, the auxiliary mixing cavity is formed at the left upper part of the main mixing cavity, and the main mixing cavity and the auxiliary mixing cavity are respectively communicated with the injection channel; the main mixing chamber is communicated with the main injection port; the secondary mixing chamber is in communication with the secondary injection port.

Furthermore, a plurality of fire distributing hole groups are uniformly distributed on the flame orifice plate; and/or the cross section of the flame hole plate is V-shaped.

Further, the gas water heater includes the burner.

Based on the foregoing description, those skilled in the art can understand that in the foregoing technical solution of the present invention, the steady combustion rectifying plate through with the combustor is divided into left side region, middle region and right side region, and all be provided with a plurality of rectifying hole groups in the three region, in order to realize distributing this internal gas of combustor evenly to the gas outlet department of combustor body, reach the effect of isobaric drainage, and then make the gas mixture in the combustor burn fully evenly, effectively prevent that orifice plate department from the flame problem because of local air flow velocity is too big brought, the combustion stability of combustor has been increased.

Further, the main injection port and the auxiliary injection port on the burner body are aligned with different areas of the combustion stabilizing rectifying plate, so that gas in the mixing cavity can be uniformly distributed on the combustion stabilizing rectifying plate, and the stability of gas combustion is improved.

Further, the distribution and the area of the rectifying holes in different areas on the stable-combustion rectifying plate are different, so that the problem that the air flow speed at the local fire dividing hole is too high is effectively prevented, flame can be kept in stable laminar flow, the problem of combustion noise generated by unstable turbulent flame is effectively solved, and meanwhile, the stable-combustion rectifying plate is arranged to enable the flame hole plate to form an even temperature field, and pollutants are effectively reduced.

Drawings

In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the present invention are not necessarily to scale relative to each other. In the drawings:

fig. 1 is a schematic structural view of a burner in some embodiments of the present invention;

FIG. 2 is an exploded view of the burner of FIG. 1;

FIG. 3 is a side view of the burner of FIG. 1;

FIG. 4 isbase:Sub>A cross-sectional view of the burner of FIG. 3 taken along the line A-A;

FIG. 5 is a schematic view of the structure of the burner body of FIG. 1;

FIG. 6 is a first axial side view of the combustion stabilizing fairing of FIG. 1;

FIG. 7 is a second axial side view of the combustion stabilizing fairing of FIG. 1;

FIG. 8 is a side view of the combustion stabilizing fairing of FIG. 7;

FIG. 9 is a cross-sectional view of the combustion stabilizing fairing of FIG. 8 taken along the direction B-B;

FIG. 10 is a schematic diagram of the structure of the flame stabilizing baffle of FIG. 7;

FIG. 11 is a schematic diagram of the configuration of the flame-orifice plate of FIG. 7;

fig. 12 is a schematic view of the structure of the combustor inner gas flow direction in fig. 1.

Detailed Description

It is to be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, and not all embodiments of the present invention, and the part of the embodiments are intended to explain the technical principle of the present invention and not to limit the scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by a person skilled in the art without any inventive work should still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, unless otherwise explicitly stated or limited in the description of the present invention, the terms "mounted," "connected" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The burner in some embodiments of the present invention will be described in detail with reference to fig. 1 to 12. Fig. 1 is a schematic structural view of a burner according to some embodiments of the present invention; FIG. 2 is an exploded view of the burner of FIG. 1; FIG. 3 is a side view of the combustor of FIG. 1; FIG. 4 isbase:Sub>A cross-sectional view of the burner of FIG. 3 taken along the line A-A; FIG. 5 is a schematic structural view of the burner body of FIG. 1; FIG. 6 is a first axial side view of the combustion stabilizing fairing of FIG. 1; FIG. 7 is a second axial side view of the combustion stabilizing fairing of FIG. 1; FIG. 8 is a side view of the combustion stabilizing fairing of FIG. 7; FIG. 9 is a cross-sectional view of the combustion stabilizing fairing of FIG. 8 taken along direction B-B; FIG. 10 is a schematic view of the structure of the combustion stabilizing baffle of FIG. 7;

FIG. 11 is a schematic diagram of the configuration of the flame-orifice plate of FIG. 7; fig. 12 is a schematic view of the structure of the combustor inner gas flow direction in fig. 1.

It should be noted that, for convenience of description and to enable those skilled in the art to quickly understand the technical solution of the present invention, only the technical features having a strong association degree (directly or indirectly) with the technical problems and/or technical concepts to be solved by the present invention will be described later, and the technical features having a weak association degree with the technical problems and/or technical concepts to be solved by the present invention will not be described again. Since the technical features with a low degree of correlation belong to the common general knowledge in the art, the present invention does not cause insufficient disclosure even if the features with a low degree of correlation are not described.

As shown in fig. 1 to 3, in some embodiments of the present invention, the burner 100 includes a burner body 1 and a stable combustion rectifying structure 3, the stable combustion rectifying structure 3 is detachably mounted on the burner body 1, and the stable combustion rectifying structure 3 is used for combusting the mixed gas jetted from the inside of the burner body 1.

With continued reference to fig. 1 to 5, the burner body 1 of the present invention includes a housing 11, an air inlet 13 and an air outlet 15. An air inlet 13 is formed at the right side of the housing 11, and an air outlet 15 is formed above the housing 11. The combustion stabilizing rectification structure 3 is arranged at the air outlet 13.

With continued reference to fig. 1-5, the housing 11 of the present invention includes a first housing 111 and a second housing 113. The first housing 111 and the second housing 113 are fixedly connected to define an injection passage 115 and a mixing chamber 117.

Continuing to refer to fig. 4, the ejector channel 115 of the present invention accommodates an ejector 1151, and the ejector 1151 is used for injecting the gas introduced from the gas inlet 13 into the mixing chamber 117.

Further, the utility model discloses well air inlet 13's cross-sectional area is greater than the cross-sectional area of drawing passageway 115, is favorable to this combustor body 1 to provide a large amount of gas for drawing 1151, and simultaneously, the cross-sectional area of hybrid chamber 117 is greater than the cross-sectional area of drawing passageway 115, is favorable to gas and air to diffuse fast and mix.

With continued reference to fig. 1-5, a mixing chamber 117 of the present disclosure is formed within the housing 11, the mixing chamber 117 including a main mixing chamber 1171, a secondary mixing chamber 1173, a main injection port 1175, and a secondary injection port 1177.

Continuing to refer to fig. 1 to 5, the utility model provides an one end and the injection passageway 115 intercommunication of main mixing chamber 1171, the other end and the main injection port 1175 intercommunication of main mixing chamber 1171, main injection port 1175 is located the top of main mixing chamber 1171 and keeps away from one side of gas outlet 15.

Further, in order to uniformly inject the gas in the main mixing chamber 1171 into the combustion stabilizing rectification structure 3, the main mixing chamber 1171 can be set to be S-shaped or any other feasible structure as required by those skilled in the art, and preferably, the main mixing chamber 1171 is set to be C-shaped by the present invention.

With continued reference to fig. 1 to 5, the sub-mixing chamber 1173 of the present invention is formed at the upper left of the main mixing chamber 1171, one end of the sub-mixing chamber 1173 is communicated with the injection passage 115, the other end of the sub-mixing chamber 1173 is communicated with the sub-injection port 1177, and the sub-injection port 1177 is located at one side of the main mixing chamber 1171, which is far away from the air outlet 15.

Further, the material thickness at different locations of the main mixing chamber 1171 of the present invention is different. Specifically, the closer the main mixing chamber 1171 is to the injection port, the thicker the main mixing chamber 1171 is, which is beneficial to avoid that the temperature at the orifice plate 31 is too high and the material of the mixing chamber 117 is deformed.

With continued reference to fig. 1 to 5, an air inlet 13 according to the present invention is formed on the right side of the housing 11, and the air inlet 13 is used to introduce air outside the housing 11 into the housing 11. The gas outlet 15 is formed above the housing 11, and the mixed gas in the housing 11 can be ejected from the gas outlet 15.

With continuing reference to fig. 1 to 9, the combustion stabilizing rectification structure 3 of the present invention is disposed at the gas outlet 15, and the combustion stabilizing rectification structure 3 includes a flame hole plate 31, a combustion stabilizing rectification plate 33 and a gas distribution chamber 35. The gas in the burner body 1 is uniformly distributed to the gas outlet 15 by the combustion stabilizing flow plate 33, the flame hole plate 31 is arranged on the upper side of the combustion stabilizing flow plate 33, the flame hole plate 31 is used for receiving the gas distributed by the combustion stabilizing flow plate 33, and a gas distribution cavity 35 is formed between the flame hole plate 31 and the combustion stabilizing flow plate 33.

With reference to fig. 11, the plurality of fire distributing hole sets 311 are uniformly distributed on the fire hole plate 31 of the present invention, and specifically, each fire distributing hole set 311 has fire distributing holes 3111 with different areas, and each fire distributing hole 3111 has the same width. Preferably, the cross-section of the flame hole plate 31 of the present invention is V-shaped.

With continued reference to fig. 10, the fuel stabilizing baffle 33 of the present invention has a left side area 331, a middle area 333, and a right side area 335. The main injection port 1175 is aligned with the right portion of the middle region 333 and the right region 335 so that the gas in the main mixing chamber 1171 is uniformly injected onto the combustion stabilizing baffle 33 through the main injection port 1175; the sub injection ports 1177 are aligned with the left side portion of the middle region 333 and the left side region 331 so as to uniformly inject the gas in the sub mixing chamber 1173 to the combustion stabilizing flow plate 33 through the sub injection ports 1177, thereby achieving the effect of constant pressure discharge of the flow, effectively preventing the flame leaving problem caused by the excessive local gas flow velocity of the flame holes, and increasing the stability of the combustion.

With continued reference to fig. 10, the left side area 331 of the present invention has a left side commutation hole group 3311, and the left side commutation hole group 3311 includes a plurality of first left side commutation holes 33111, a plurality of second left side commutation holes 33113, and a plurality of third left side commutation holes 33115, which are distributed in sequence from left to right. Wherein the cross-sectional area of the flow straightening holes in the second left-hand flow straightening hole 33113 is largest, the cross-sectional area of the first left-hand flow straightening hole 33111 is next to the cross-sectional area of the flow straightening holes in the third left-hand flow straightening hole 33115 is smallest; and the plurality of second left rectification holes 33113 are spaced apart from each other more than the plurality of first left rectification holes 33111 are spaced apart from each other and more than the plurality of third left rectification holes 33115 are spaced apart from each other.

Preferably, the first left rectification hole 33111 of the present invention has a length of 5mm. Further preferably, the number of the first left rectification holes 33111 is 3.

It is further preferred that the second left rectification hole 33113 in the present invention has a length of 6mm. It is further preferred that the number of the second left-side rectification holes 33113 is 3.

Further preferably, the third left rectification hole 33115 in the present invention has a length of 3mm. It is further preferred that the number of the second left rectification holes 33113 is 4.

With continued reference to fig. 10, the middle region 333 of the present invention has a middle rectifying hole group 3331, the middle rectifying hole group 3331 includes a plurality of middle rectifying holes 33311, and the intervals and the diameters of the plurality of middle rectifying holes 33311 are the same.

Preferably, the length of the middle rectifying hole 33311 in the present invention is 6mm. Further preferably, the number of the first left rectification holes 33111 is 20.

With continued reference to fig. 10, the right side region 335 of the present invention has a right side flow rectification hole group 3351, and the right side flow rectification hole group 3351 includes a plurality of first right side flow rectification holes 33511, a plurality of second right side flow rectification holes 33513, and a plurality of third right side flow rectification holes 33515 which are distributed from left to right. Wherein the areas of the first right-side rectifying hole 33511, the second right-side rectifying hole 33513 and the third right-side rectifying hole 33515 are sequentially decreased; and the intervals among the plurality of first right-side rectifying holes 33511, the plurality of second right-side rectifying holes 33513 and the plurality of third right-side rectifying holes 33515 are sequentially decreased.

Preferably, the length of the first right rectifying hole 33511 in the present invention is 4mm. Further preferably, the number of the first right rectification holes 33511 is set to 12.

It is further preferred that the length of the second right-side rectifying hole 33513 in the present invention is 3mm. Further preferably, the number of the second right-side rectification holes 33513 is 10.

Further preferably, the length of the third right rectifying hole 33515 in the present invention is 2mm. Further preferably, the number of the third right rectifying holes 33515 is 23.

Further, in the present invention, the area ratio of the left side region 331, the middle region 333, and the right side region 335 is 2.

Further, the area ratio of the left rectifying hole group 3311, the middle rectifying hole group 3331, and the right rectifying hole group 3351 in the present invention is 3.

Furthermore, the widths of the flow holes corresponding to the left flow rectification hole group 3311, the middle flow rectification hole group 3331 and the right flow rectification hole group 3351 are the same.

Further, in the present invention, the length of the rectifying holes of the middle region 333 is the longest in the left region 331, the middle region 333, and the right region 335, and the interval between the rectifying holes of the middle region 333 is the smallest in the interval between the rectifying holes of the rectifying holes in the left region 331, the middle region 333, and the right region 335, and since the left side of the mixing chamber 117 is narrow and the velocity of the ejected mixed gas is large, the interval between the plurality of rectifying holes in the left region 331 is larger than that in the other regions, and the number of the rectifying holes in the left region 331 is smaller than that in the other regions.

The operation of the burner 100 will now be briefly explained with reference to fig. 12:

the burner 100 injects the gas and the air in the air inlet 13 into the mixing cavity 117 through the injector 1151 to form a mixed air flow, the air flow is fully mixed in the main mixing cavity 1171 and the auxiliary mixing cavity 1173 and is injected onto the combustion stabilizing flow plate 33 through the main injection port 1175 and the auxiliary injection port 1177, and the mixed gas is uniformly distributed to the flame hole plate 31 by the combustion stabilizing flow plate 33 for ignition and combustion.

The technical personnel in the field can understand, the utility model discloses a divide into the steady burning cowling panel 33 of combustor 100 left side region 331, middle zone 333 and right side region 335, and all be provided with a plurality of rectification punch combination in the three region, in order to realize distributing the gas outlet 15 department of combustor body 1 with the gas in the combustor body 1 evenly, reach the effect of isobaric drainage, and then make the gas mixture in the combustor 100 fully evenly burn, effectively prevent that the flame orifice panel 31 department from the flame problem because of the too big emergence of local air flow speed, the combustion stability of combustor 100 has been increased.

Further, the main injection port 1175 and the auxiliary injection port 1177 on the burner body 1 are aligned with different areas of the combustion stabilizing flow plate 33, so that the gas in the mixing cavity 117 can be uniformly distributed on the combustion stabilizing flow plate 33, and the stability of gas combustion is improved.

Further, the distribution and the area through the rectifying hole of the different regions on the steady burning rectifying plate 33 are different, effectively prevent that the air velocity of local branch fire hole 3111 department is too big for flame can keep in stable laminar flow, and then effectively solve the burning noise problem that unstable torrent flame produced, simultaneously, the setting up of steady burning rectifying plate 33 makes flame orifice plate 31 department form even temperature field, effectively reduces the production of pollutant.

So far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without deviating from the technical principle of the present invention, those skilled in the art can split and combine the technical solutions in the above embodiments, and also can make equivalent changes or substitutions for the related technical features, and any changes, equivalent substitutions, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.

Claims (12)

1. A burner for a gas water heater, comprising:

the burner comprises a burner body, wherein an air inlet and an air outlet are formed in the burner body;

the gas outlet is provided with a gas inlet, the gas inlet is provided with a gas inlet hole group, the gas outlet hole group is arranged in the gas inlet hole group, the gas inlet hole group is arranged in the gas inlet hole group, and the gas outlet hole group is arranged in the gas outlet hole group; the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group are used for uniformly distributing gas in the combustor body to the gas outlet;

the flame orifice plate is arranged on the upper side of the combustion stabilizing flow plate and is used for receiving the gas distributed by the combustion stabilizing flow plate.

2. Burner for gas water heaters according to claim 1,

the burner body comprises a main injection port and an auxiliary injection port, and the main injection port and the auxiliary injection port are both positioned on one side of the combustion stabilizing rectifying plate away from the gas outlet;

the main ejection port is aligned with a right portion of the middle region and the right region;

the sub ejection port is aligned with a left portion of the middle region and the left region.

3. Burner for gas water heaters according to claim 2,

the area ratio of the left side region, the middle region, and the right side region is 2.

4. Burner for gas water heaters according to claim 2,

the area ratio of the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group is 3.

5. Burner for gas water heaters according to claim 1,

the left rectifying hole group comprises a plurality of first left rectifying holes, a plurality of second left rectifying holes and a plurality of third left rectifying holes which are distributed from left to right in sequence,

the cross-sectional area of the rectifying hole in the second left rectifying hole is the largest, the cross-sectional area of the rectifying hole in the first left rectifying hole is the next largest, and the cross-sectional area of the rectifying hole in the third left rectifying hole is the smallest; and is

The second left-hand rectification holes are spaced apart from one another by a distance greater than the first left-hand rectification holes and greater than the third left-hand rectification holes.

6. Burner for gas water heaters according to claim 1,

the middle rectifying hole group comprises a plurality of middle rectifying holes, and the intervals and the hole diameters of the middle rectifying holes are the same.

7. Burner for gas water heaters according to claim 1,

the right rectifying hole group comprises a plurality of first right rectifying holes, a plurality of second right rectifying holes and a plurality of third right rectifying holes which are distributed from left to right in sequence,

the areas of the first right trim orifice, the second right trim orifice and the third right trim orifice decrease in sequence; and is provided with

The first right-hand fairing holes, the second right-hand fairing holes and the third right-hand fairing holes are arranged at decreasing distances from one another in succession.

8. Burner for gas water heaters according to any of the claims 1 to 7,

the widths of the rectifying holes corresponding to the left rectifying hole group, the middle rectifying hole group and the right rectifying hole group are the same.

9. Burner for gas water heaters according to claim 2,

the burner body further comprises:

a housing comprising a first housing and a second housing;

the injection passage is formed in the shell, an injector is accommodated in the injection passage, and one end of the injection passage is communicated with the air inlet;

the mixing cavity is formed in the shell, the other end of the ejector channel is communicated with the mixing cavity, the mixing cavity is communicated with the main jet orifice and the auxiliary jet orifice, and the mixing cavity is used for fully mixing the gas ejected from the ejector with air.

10. Burner for gas water heaters according to claim 9,

the mixing cavity comprises a main mixing cavity and an auxiliary mixing cavity;

the main mixing cavity is C-shaped, the auxiliary mixing cavity is formed at the left upper part of the main mixing cavity, and the main mixing cavity and the auxiliary mixing cavity are respectively communicated with the injection channel;

the main mixing cavity is communicated with the main injection port;

the secondary mixing chamber is in communication with the secondary jet orifice.

11. Burner for gas water heaters according to claim 1,

a plurality of fire distribution hole groups are uniformly distributed on the flame hole plate; and/or the like and/or,

the cross section of the flame orifice plate is V-shaped.

12. A gas water heater is characterized in that a water inlet pipe is arranged on the water inlet pipe,

the gas water heater comprising the burner of any one of claims 1-11.

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