CN223782853U

CN223782853U - Top-extraction burner, burner and gas water heater

Info

Publication number: CN223782853U
Application number: CN202423183739.9U
Authority: CN
Inventors: 王元凯; 范程远; 刘云; 孙运磊; 曹冠忠
Original assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Priority date: 2024-08-20
Filing date: 2024-12-23
Publication date: 2026-01-09
Anticipated expiration: 2034-12-23

Abstract

The utility model discloses an up-drawing type thick and thin fire grate, a burner and a gas water heater. The upper-drawing type thick and thin fire grate comprises a fire grate main body, wherein a first injection pipe and a second injection pipe are arranged on the fire grate main body, a distribution runner and a mounting port are further arranged in the fire grate main body, the mounting port, the distribution runner and the first injection pipe are sequentially communicated, an air outlet part is formed at the tail part of the second injection pipe, a plurality of air outlets are formed in the air outlet part, the open areas of the air outlets are in a diminishing trend along the air flow direction in the second injection pipe, a side cover plate is arranged on the fire grate main body and covers the air outlets, a thick flame port is formed between the side cover plate and the fire grate main body, and a plurality of thin flame ports are formed in an inner core piece. The flame stabilizing effect is optimized to improve the flame combustion stability and reduce the combustion noise.

Description

Upper-drawing type thick and thin fire row, burner and gas water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to an up-drawing type thick and thin fire grate, a burner and a gas water heater.

Background

At present, the water heater is a household appliance commonly used in daily life of people. The water heater is classified into a gas water heater, an electric water heater, and the like, wherein the gas water heater is widely used because of its convenient use. Conventional gas water heaters typically include a fan, a burner that burns gas within the burner to heat water flowing through the heat exchanger, a combustion chamber, and a heat exchanger.

The gas water heater is divided into a lower drum type gas water heater and an upper pumping type gas water heater according to different installation positions of the fans. For the upward pumping type gas water heater, the fan is arranged at the top of the heat exchanger, and under the action of the fan, negative pressure is formed in the combustor so as to suck external air into the combustor for combustion. For example, chinese patent publication No. CN 117824144A discloses a gas water heater, a combustion device thereof, and a thick and thin fire grate, wherein the thick and thin fire grate is provided with two air inlets to meet the flowing requirements of the thick mixed gas and the thin mixed gas. In the process of conveying the rich mixed gas, the flame height difference of rich flames at different positions of the rich and lean flame rows is larger due to uneven gas distribution, and the flame stabilizing effect of the rich flames on the lean flames is greatly reduced, so that the problems of flame separation or obvious combustion noise caused by unstable flame combustion are easy to occur. In view of this, it is an object of the present utility model to design a technique for optimizing flame stabilizing effect to improve flame combustion stability and reduce combustion noise.

Disclosure of utility model

The utility model provides an up-drawing type thick and thin fire grate, a burner and a gas water heater, which realize the optimized flame stabilizing effect so as to improve the flame combustion stability and reduce the combustion noise.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme:

In one aspect, the present utility model provides an up-draw type light and dark fire grate comprising:

The fire grate comprises a fire grate main body, wherein a first injection pipe and a second injection pipe are arranged on the fire grate main body, a distribution runner and a mounting port are also arranged in the fire grate main body, the mounting port, the distribution runner and the first injection pipe are sequentially communicated, an air outlet part is formed at the tail part of the second injection pipe, and a plurality of air outlet holes are formed in the air outlet part;

The side cover plate is arranged on the fire grate main body and covers the air outlet holes, and a thick flame port is formed between the side cover plate and the fire grate main body;

an inner core member provided with a plurality of light flame ports thereon;

wherein the core member is provided in the mounting port.

In an embodiment of the present application, the plurality of air outlet holes are divided into at least one first through hole and at least one second through hole, and an open area of the first through hole is larger than an open area of the second through hole;

the first through holes and the second through holes are sequentially arranged along the airflow flowing direction in the second injection pipe.

In one embodiment of the present application, the first through hole is a strip hole, and the strip hole extends along the airflow flowing direction in the second injection pipe.

In an embodiment of the present application, each of the first through holes and each of the second through holes includes a plurality of ventilation sub-holes;

The number of the ventilation sub-holes in the unit area of the area where the first through holes are located is larger than the number of the ventilation sub-holes in the unit area of the area where the second through holes are located.

In one embodiment of the present application, the plurality of ventilation sub-holes are sequentially arranged along the airflow flowing direction in the second injection pipe.

In one embodiment of the present application, a plurality of the air outlet holes are sequentially arranged from top to bottom in an air flow direction in the second ejector tube.

In one embodiment of the application, the inner surface of the side cover plate is also provided with a guide bulge, the lower part of the guide bulge is provided with a first inclined part, a second inclined part and a straight part, and the straight part is connected between the first inclined part and the second inclined part;

the guide protrusion is arranged above the air outlet part;

the first inclined part is configured to guide the gas output by the gas outlet hole to flow along the reverse direction of the airflow in the second injection pipe,

The second inclined part is configured to guide the gas output by the gas outlet to flow along the direction of the airflow in the second injection pipe.

In one embodiment of the present application, a plurality of vertical protrusions are further disposed on the inner surface of the side cover plate, and the vertical protrusions are abutted against the fire grate main body;

And/or the inner surface of the side cover plate is provided with the transverse bulge, and a space is formed between the transverse bulge and the fire row main body.

On the other hand, an embodiment of the application also provides a combustor, which comprises a shell, wherein a plurality of first air inlets and a plurality of second air inlets are arranged on the side part of the shell, a vent is arranged at the bottom of the shell, and the combustor further comprises the thick fire row and the thin fire row;

The multiple thick and thin fire rows are arranged side by side and are arranged in the shell and are located above the ventilation openings, the first injection pipes of the thick and thin fire rows are communicated with the corresponding first air inlets, and the second injection pipes of the thick and thin fire rows are communicated with the corresponding second air inlets.

On the other hand, the embodiment of the application also provides a gas water heater which comprises a shell, a heat exchanger, a fan and the burner, wherein the heat exchanger, the fan and the burner are arranged in the shell, and the fan, the heat exchanger and the burner are sequentially arranged from top to bottom.

Compared with the prior art, the beneficial effects at least comprise:

The tail part of the second injection pipe is provided with the plurality of air outlet holes, the opening area of the air outlet holes is in a trend of diminishing along the air flow direction in the second injection pipe, the flow area of the rich mixture at the air outlet part of the second injection pipe is effectively increased, the flow of the mixed gas is realized by adopting a fan air suction mode to utilize negative pressure in the combustor, the opening area of each air outlet hole on the air outlet part is changed approximately slightly, the air resistance of the rich mixture just flowing into the air outlet part is ensured to be smaller, the resistance of the gas sucked by the second injection pipe is effectively reduced, the flow of the rich mixture conveyed to the rich flame port is improved, and the stability of the rich flame to the lean flame is further enhanced. In the actual use process, the resistance of the thick gas when flowing in the second injection pipe can be effectively reduced, the flow of the thick gas mixture is improved, the flame stabilizing capability of the thick flame is ensured, in addition, the area of the gas outlet hole at the head part of the gas outlet part is maximum, the total gas outlet quantity of the thick gas mixture flowing to the second injection pipe is ensured to be enough, further, the uniform gas outlet quantity distribution of thick flame ports at different positions of thick flame and thin flame rows is ensured, the thick flame ports at all positions can uniformly and effectively pull the thin flame generated by the inner thin flame ports, so that the combustion effect is improved, the optimal flame stabilizing effect is realized, the flame combustion stability is ensured, and meanwhile, the combustion noise is reduced due to the reduction of the flame leaving condition occurrence rate of the thin flame.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a burner according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the thick and thin fire grate of FIG. 1;

FIG. 3 is an exploded view of the light and dark fire grate of FIG. 2;

FIG. 4 is a schematic view of the fire grate main body in FIG. 3;

FIG. 5 is a schematic view of the side cover plate of FIG. 3;

FIG. 6 is a schematic diagram of a gas water heater according to an embodiment of the present utility model.

Reference numerals:

1. A thick fire row, a fire row main body, 12 side cover plates, 13 and an inner core member;

111. a first ejector tube; 112, a second injection pipe, 113, a distribution runner, 114, a mounting port;

121. vertical bulges 122, transverse bulges 123 and diversion bulges;

1231. 1232, second inclined portion, 1233, straight portion;

2. a housing; 21, a first air inlet, 22 and a second air inlet.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The gas water heater adopts gas as main energy material, and the high temperature heat generated by combustion of the gas is transferred to cold water flowing through a heat exchanger to achieve the purpose of preparing hot water.

Gas water heaters typically include a housing, and a burner, heat exchanger, fan, and fan housing disposed within the housing.

The gas is conveyed to the burner, and is ignited by the ignition device, so that the burner combusts the conveyed gas, and heat is further generated.

The heat exchanger is internally provided with a heat exchange tube, one end of the heat exchange tube is communicated with a water supply pipeline, and the other end of the heat exchange tube is communicated with a shower head or a tap.

The heat generated by the combustion of the fuel gas by the burner is used for heating the heat exchange tube so as to raise the water temperature in the heat exchange tube to form hot water.

When the gas water heater works, cold water provided by the water supply pipeline flows into the heat exchange pipe, is heated into hot water by the heating source generated by the burner, and flows out of the shower head or the water tap through the hot water valve for users to use.

Meanwhile, in the operation of the gas water heater, the fans are electrified and run simultaneously, and under the action of the fans, the flue gas generated by the burner is discharged outdoors.

First embodiment as shown in fig. 1 to 5, a burner according to an embodiment of the present application includes a thick and thin fire row 1 and a housing 2, wherein a plurality of thick and thin fire rows 1 are installed in the housing 2.

The thick and thin fire grate 1 generally comprises a fire grate main body 11, a side cover plate 12 and an inner core member 13.

The fire grate main body 11 is provided with a first injection pipe 111 and a second injection pipe 112, the fire grate main body 11 is also provided with a distribution runner 113 and a mounting port 114, the distribution runner 113 and the first injection pipe 111 are sequentially communicated, the tail part of the second injection pipe 112 forms an air outlet part, the air outlet part is provided with a plurality of air outlet holes 1121, and the opening area of the air outlet holes 1121 is in a trend of diminishing along the air flow direction in the second injection pipe 112.

The side cover plate 12 is arranged on the fire grate main body 11 and covers the air outlet hole 1121, and a thick flame runner is formed between the side cover plate 12 and the fire grate main body 11 and provided with a thick flame port.

A core member 13, the core member 13 being provided with a plurality of light flame ports, the core member being provided in the mounting port 114.

In order to meet the air intake requirement of the thick and thin fire bars on the shell 2, a plurality of first air inlets 21 and a plurality of second air inlets 22 are arranged on the shell 2, the first air inlets 21 can meet the requirement that the first injection pipe 111 inputs the thin mixed gas, and the second air inlets 22 can meet the requirement that the second injection pipe 112 inputs the thick mixed gas. The light mixture gas conveyed by the first ejector pipe 111 is output at a light flame port and burnt to form a light flame, and the thick mixture gas conveyed by the second ejector pipe 112 is output at a thick flame port and burnt to form a thick flame. Wherein the bottom of the housing 2 is provided with a vent to meet the intake requirements of air being drawn into the housing 2.

The tail of the second injection pipe 112 forms an air outlet part, a plurality of air outlet holes 1121 are arranged on the air outlet part, and the open areas of the air outlet holes 1121 are in a trend of decreasing along the air flow direction in the second injection pipe 112.

Specifically, the second ejector pipe 112 is used for conveying the rich mixture, and in a normal case, the pipe diameter of the second ejector pipe 112 is smaller than that of the first ejector pipe 111, so that the air resistance in the second ejector pipe 112 is larger. Meanwhile, since the blower adopts the updraft mode, air and fuel gas are sucked by utilizing the negative pressure formed in the housing 2 to mix, in order to increase the amount of air intake of the rich mixture in the second injection pipe 112, the open areas of the plurality of air outlet holes 1121 are gradually increased by following the opposite direction of the air flow in the second injection pipe 112.

In this way, for the mixed gas sucked into the second ejector pipe 112, in the flowing process of the mixed gas, the open area of the air outlet hole 1121 at the head position of the air outlet part is large, so that the air resistance generated by the second ejector pipe 112 can be reduced, and the thick mixed gas sucked into the second ejector pipe 112 can smoothly enter between the side cover plate 12 and the fire grate main body 11 through each air outlet hole 1121.

Since the plurality of air outlet holes 1121 have gradually increased opening areas along the opposite direction of the air flow, the air resistance of the air intake of the second injection pipe 112 is reduced, which is more advantageous to improve the intake air amount and intake speed, and the uniformity of the distribution of the rich mixture of different rich flame ports can be ensured to improve the combustion stability.

The tail part of the second injection pipe is provided with the plurality of air outlet holes, the opening area of the air outlet holes is in a trend of diminishing along the air flow direction in the second injection pipe, the flow area of the rich mixture at the air outlet part of the second injection pipe is effectively increased, the flow of the mixed gas is realized by adopting a fan air suction mode to utilize negative pressure in the combustor, the opening area of each air outlet hole on the air outlet part is changed approximately slightly, the air resistance of the rich mixture just flowing into the air outlet part is ensured to be smaller, the resistance of the gas sucked by the second injection pipe is effectively reduced, the flow of the rich mixture conveyed to the rich flame port is improved, and the stability of the rich flame to the lean flame is further enhanced. In addition, the area of the air outlet hole at the head part of the air outlet part is the largest, the total air outlet amount of the thick mixed gas flowing to the second injection pipe is ensured to be enough, the air outlet amount distribution of the thick flame ports at different positions of the thick flame row is ensured to be even, the thick flame ports at all positions can uniformly and effectively pull the thin flame generated by the inner thin flame ports, so as to improve the combustion effect, realize the optimized flame stabilizing effect and improve the flame combustion stability, and simultaneously, the flame combustion stability can be ensured and the combustion noise is reduced due to the reduction of the flame leaving condition occurrence rate of the thin flame

In one embodiment, in order to realize the trend that the open areas of the plurality of air outlet holes 1121 increase in the opposite direction of the air flow, the following structure may be adopted.

The plurality of air outlet holes 1121 are divided into at least one first through hole and at least one second through hole, and the opening area of the first through hole is larger than the opening area of the second through hole, where the first through hole and the second through hole are sequentially arranged along the airflow flowing direction in the second injection pipe 112.

Specifically, the first through hole is a strip hole, and the strip hole extends along the airflow direction in the second ejector pipe 112. The design of bar hole can increase the open area of first through-hole on the one hand, on the other hand can also lengthen the air supply route of first through-hole.

Or each first through hole and each second through hole respectively comprise a plurality of ventilation sub-holes, wherein the number of the ventilation sub-holes in the unit area of the area where the first through holes are located is larger than the number of the ventilation sub-holes in the unit area of the area where the second through holes are located.

In addition, the plurality of ventilation sub-holes are arranged in sequence along the airflow flowing direction in the second ejector pipe 112.

In another embodiment of the present application, the area of the cross-section of the airflow path of the air outlet portion in the second ejector pipe 112 is smaller than the area of the ejector opening of the second ejector pipe 112.

Specifically, in order to increase the airflow output speed of the air outlet portion, the airflow passage cross-sectional area of the air outlet portion is smaller, so that the airflow velocity output from the air outlet hole 1121 increases. At the same time, matching the trend of decreasing the opening area of the different outlet holes 1121 in the air flow direction, the flow rate of the air flow can be ensured while the intake air amount is properly increased.

In one embodiment, a plurality of the air outlet holes are sequentially arranged from top to bottom in an inclined manner along the air flow direction in the second injection pipe.

Specifically, for the air outlet portion, the air outlet portion extends obliquely from top to bottom along the air flow direction in the second injection pipe 112, and the included angle between the oblique extending direction of the air outlet portion and the air inlet direction of the second injection pipe 112 is 10 ° to 20 °.

Specifically, the adoption of the design of the included angle of the air outlet part improves the local resistance caused by the abrupt change of the cross section of the air outlet part, so that the high speed is still realized when the rich mixed gas flows out of the air outlet hole 1121, enough energy is provided for the subsequent mixed development in the rich flame runner, meanwhile, the gradient of the inclined plane is gradually reduced, the volume of the inlet structure of the rich mixed gas is also increased, the amount of the rich mixed gas flowing through the air outlet hole 1121 at the same time is increased, the flow speed is accelerated, and the diffusion of the follow-up rich mixed gas is facilitated.

In one embodiment of the application, the inner surface of the side cover plate is also provided with a flow guiding protrusion 123, the lower part of the flow guiding protrusion is provided with a first inclined part 1231, a second inclined part 1232 and a straight part 1233, and the straight part is connected between the first inclined part and the second inclined part;

the guide protrusion is arranged above the air outlet part;

Specifically, the flow-guiding protrusions 123 are disposed obliquely above the air outlet portion in the air flow conveying direction of the second ejector pipe 112, so that the rich mixture output from each air outlet hole 1121 will flow through the flow-guiding protrusions 123 to guide the air flow through the flow-guiding protrusions 123.

Part of the gas is blocked by the first inclined part 1231 of the guide protrusion 123 and flows to the thick flame ports on the second injection pipe 112, and the rest of the gas is guided by the straight part 1233 and guided and conveyed to the thick flame ports distributed far from the second injection pipe 112 by the second inclined part 1232.

The first inclined portion 1231 extends from bottom to top in a direction opposite to the airflow direction in the second ejector pipe 112, and the second inclined portion 1232 extends from bottom to top in the airflow direction in the second ejector pipe 112.

In one embodiment, a plurality of vertical protrusions 121 are further disposed on the inner surface of the side cover plate 12, and the vertical protrusions 121 abut against the fire grate main body 11.

The inner surface of the side cover plate 12 is provided with lateral protrusions 122, and the lateral protrusions 122 are spaced apart from the fire grate main body.

Specifically, vertical protrusions 121 are added in a rich mixing region formed between the side cover plate 12 and the fire grate main body 11, and a vertical channel is formed between two adjacent vertical protrusions 121 to guide the rich mixture to flow to a rich flame port.

In addition, the lateral protrusions 122 provided on the side cover 12 can block and uniformly disperse the rich mixture flowing to the rich flame ports. In the process that the rich mixture flows towards the rich flame port, when the rich mixture flows to the transverse bulge 122, the transverse bulge 122 can block the rich mixture to a certain extent, so that part of the rich mixture directly flows to the rich flame port through the interval formed between the transverse bulge 122 and the fire grate main body, and the rest of the rich mixture flows to the rich flame port along the interval between the transverse bulge 122 and the fire grate main body after guiding and diffusing along the transverse bulge 122, so that the effect of uniformly distributing the rich mixture is achieved, and the uniformity of the airflow of the rich flame port is ensured. The problem that the gas outlet quantity of the thick flame port adjacent to the gas outlet part is overlarge due to the limitation of the position of the gas outlet part is solved, so that the combustion stability of the thick flame is realized, and the flame stabilizing capability of the thick flame to the thin flame is improved.

In a second embodiment, as shown in fig. 6, the present application further provides a gas water heater, which includes:

A casing 100, on which a water inlet pipe 101 and a water outlet pipe 102 are further arranged;

a heat exchanger 200 in which a heat exchange flow passage is formed;

A burner 300, which is the burner of the first embodiment;

A blower 400;

The heat exchanger, the fan and the burner are arranged in the shell, and the fan, the heat exchanger and the burner are sequentially arranged from top to bottom.

The above embodiments are only for illustrating the technical solution of the present utility model, but not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the above embodiments or equivalents may be substituted for some of the technical features thereof, and the modifications or substitutions do not depart from the spirit and scope of the technical solution as claimed in the present utility model.

Claims

1. An up-draw type thick and thin fire grate, which is characterized by comprising:

an inner core member provided with a plurality of light flame ports thereon;

wherein the core member is provided in the mounting port.

2. The upper extraction type thick and thin fire grate of claim 1, wherein a plurality of the air outlet holes are arranged in sequence from top to bottom in an inclined manner along the flow direction of the air flow in the second injection pipe.

3. The upper extraction type thick and thin fire grate of claim 1, wherein the inner surface of the side cover plate is also provided with a flow guide protrusion, the lower part of the flow guide protrusion is provided with a first inclined part, a second inclined part and a straight part, and the straight part is connected between the first inclined part and the second inclined part;

the guide protrusion is arranged above the air outlet part;

The first inclined part is configured to guide the gas output by the gas outlet to flow along the direction opposite to the airflow flowing in the second injection pipe, and the second inclined part is configured to guide the gas output by the gas outlet to flow along the direction of the airflow flowing in the second injection pipe.

4. The upper suction type thick and thin fire grate of claim 1, wherein a plurality of vertical protrusions are further arranged on the inner surface of the side cover plate, and the vertical protrusions are abutted against the fire grate main body;

And/or transverse protrusions are arranged on the inner surface of the side cover plate, and a space is formed between the transverse protrusions and the fire row main body.

5. The up-draw type light and dark fire grate of any one of claims 1 to 4, wherein the plurality of gas outlets are divided into at least one first through hole and at least one second through hole, and the open area of the first through hole is larger than the open area of the second through hole;

6. The upper extraction type light and dark fire grate of claim 5, wherein the first through holes are strip-shaped holes which extend along the flow direction of the air flow in the second injection pipe.

7. The up-draw type light-rich fire grate of claim 5, wherein each of the first through holes and each of the second through holes respectively comprise a plurality of ventilation sub-holes;

8. The upper extraction type light and dark fire grate of claim 7, wherein a plurality of said vent sub-holes are arranged in sequence along the direction of airflow in said second ejector tube.

9. A burner comprising a housing, a plurality of first air inlets and a plurality of second air inlets being provided at the side of the housing, and a vent being provided at the bottom of the housing, characterized by further comprising an up-draw type light-rich fire row according to any one of claims 1-8;

10. The gas water heater comprises a shell, a heat exchanger and a fan, and is characterized by further comprising the burner according to claim 9, wherein the heat exchanger, the fan and the burner are arranged in the shell, and the fan, the heat exchanger and the burner are sequentially arranged from top to bottom.