CN220471903U - Gas water heater - Google Patents

Abstract

The utility model discloses a gas water heater, which comprises a combustion chamber, wherein a ventilation plate is arranged, the ventilation plate and the bottom of the combustion chamber are enclosed to form an air inlet cavity, and the ventilation plate and the upper part of the combustion chamber are enclosed to form a combustion cavity; the burner is arranged in the combustion cavity, and an air inlet of the burner is connected with the ventilation opening; the gas supply pipe is arranged in the air inlet cavity, and a plurality of air nozzles are arranged on the gas supply pipe and correspond to the ventilation openings; the air supply assembly comprises a first fan and a second fan, and the first fan and the second fan are arranged side by side along the length direction of the combustion chamber. By arranging the first fan and the second fan side by side along the length direction of the combustion chamber, the air smoothness in the air inlet cavity is improved, the generation of vortex clusters is reduced, and the uniformity of secondary air distribution is improved; increasing the amount of primary air entering the burner, thereby improving combustion conditions; the uniform combustion environment can reduce flame height and avoid local scaling of the heat exchanger.

Description

Gas water heater

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a gas water heater.

Background

At present, water heaters are household appliances commonly used in daily life of people, and are classified into electric water heaters, gas water heaters, heat pump water heaters, solar water heaters and the like. The gas water heater is also called gas water heater, it uses gas as fuel, and transfers heat to cold water flowing through heat exchanger by means of combustion heating mode so as to attain the goal of preparing hot water. Conventional gas water heaters typically include a fan, a fire grate, a burner, a combustion chamber, and a heat exchanger, where the burner combusts gas within the combustion chamber to heat water flowing through the heat exchanger. In the using process of the gas water heater, the air flow is required to be conveyed through the fan, part of the air flow is used as primary air to be mixed with the gas to enter the combustion chamber to participate in combustion, and the rest of the air flow is used as secondary air to directly enter the combustion chamber.

The conventional gas water heater mostly adopts a single fan for supplying air, and the fan is biased in structural design. For example, chinese patent publication No. CN109000377a discloses a constant temperature gas water heater and a constant temperature control method for the gas water heater, comprising: the main controller, the heat exchanger, the water inlet pipe, water outlet pipe that connect with heat exchanger; the water inlet pipe is provided with a first branch and a second branch which are connected in parallel, the first branch is provided with a water storage tank and a first water proportional valve, and an electric heater and a temperature sensor are arranged in the water storage tank; a second water proportional valve is arranged on the second branch; the first water proportional valve, the second water proportional valve, the electric heater and the temperature sensor are all connected with the main controller.

The fan of the gas water heater is arranged at the left side in a biased manner, vortex groups are easily generated at the right side of the air inlet area, the primary air quantity entering the burner from the right side is less, secondary air entering the combustion chamber is unevenly distributed, the combustion speeds of the heads of the fire bars of the burner are different, a large speed gradient is formed between flames, and then the flame in the combustion chamber is unstable. In addition, the unbalanced combustion environment can also cause the problems of local overheating in the heat exchanger tube above the combustion chamber, scaling in the heat exchanger, and the like. In view of this, it is an object of the present utility model to design a gas water heater technology that improves uniformity of air distribution in a combustion chamber to improve combustion conditions and reduce heat exchanger fouling.

Disclosure of Invention

The utility model provides a gas water heater, which can improve the uniformity of air distribution in a combustion chamber so as to improve the combustion condition and reduce the scaling of a heat exchanger.

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 a gas water heater comprising:

the combustion chamber is internally provided with a ventilation plate, the ventilation plate and the bottom of the combustion chamber enclose to form an air inlet cavity, the ventilation plate and the upper part of the combustion chamber enclose to form a combustion cavity, the ventilation plate is provided with a plurality of ventilation openings and a plurality of ventilation openings, and the ventilation openings are communicated with the air inlet cavity and the combustion cavity;

the burner is arranged in the combustion cavity, and an air inlet of the burner is connected with the ventilation opening;

the gas supply pipe is arranged in the air inlet cavity, and a plurality of air nozzles are arranged on the gas supply pipe and correspond to the ventilation openings one by one; and, a step of, in the first embodiment,

the air supply assembly comprises a first fan and a second fan, the air outlets of the first fan and the second fan are communicated with the air inlet cavity, and the first fan and the second fan are arranged side by side along the length direction of the combustion chamber.

Compared with the prior art, the utility model has the advantages and positive effects that: through setting up combustion chamber, combustor, gas supply pipe and air supply subassembly, be provided with the ventilating board in the combustion chamber, the ventilating board separates the combustion chamber into air inlet cavity and combustion chamber, and the air supply subassembly includes first fan and second fan, and first fan and second fan set up side by side along the length direction of combustion chamber, and double fan work simultaneously provides primary air and secondary air that the burning needs; on one hand, the air fluency in the air inlet cavity is improved, vortex generation is reduced, and the uniformity of secondary air distribution is improved; on the other hand, the amount of primary air entering the burner can be increased through the air supply of the double fans, so that the fuel gas is more uniformly and fully combusted, the combustion working condition is improved, and the generation of pollutants is reduced; meanwhile, the uniform combustion environment can reduce the flame height, so that the whole heat exchanger in the combustion chamber is in high-temperature flue gas, the direct burning of the flame to the heat exchanger is avoided, and the scaling problem caused by local overheating of the heat exchanger is improved.

In some embodiments of the present application, the first fan and the second fan are symmetrically arranged along a length direction of the combustion chamber.

The first fan and the second fan are symmetrically arranged along the length direction of the combustion chamber, so that symmetrically distributed air flow fields are formed in the air inlet cavity, generation of vortex masses is eliminated, uniformity of pressure distribution in the combustion chamber is improved, and combustion working conditions of fuel gas are improved.

In some embodiments of the present application, the vent holes include a first vent hole and a second vent hole, the vent plate includes:

the first plate body is provided with a plurality of first vent holes; and, a step of, in the first embodiment,

the second plate body is positioned below the first plate body, and a plurality of second ventilation holes are formed in the second plate body.

Through setting up first plate body and second plate body, first plate body is located the top of second plate body, is provided with a plurality of first ventilation hole on first plate body, is equipped with a plurality of second ventilation hole on the second plate body, and the air current of being convenient for passes first ventilation hole and second ventilation hole respectively and enters into the burning cavity.

In some embodiments of the present application, the second plate has an area greater than the first plate, and the second plate has an open porosity greater than the first plate.

The number of the second ventilation holes in the unit area of the second plate body is set to be larger than that of the first ventilation holes in the unit area of the first plate body, so that the air flow can uniformly pass through the second plate body, and the combustion condition of the fuel gas is improved.

In some embodiments of the present application, the ventilation board further comprises:

the third plate body, the one end of third plate body with first plate body is connected, the other end of third plate body with the second plate body is connected, the vent set up in on the third plate body.

In some embodiments of the present application, the gas water heater further comprises:

the adjusting plate is arranged on the ventilating plate close to the side of the gas supply pipe, a plurality of adjusting holes are formed in the adjusting plate, the adjusting holes correspond to the ventilation openings one by one, and the adjusting plate is configured to adjust the amount of air entering the combustor.

In some embodiments of the present application, the burner comprises:

the fire grate comprises a diffusion flow passage, a flow dividing groove and an air outlet cavity which are sequentially communicated, a first inclined surface is arranged on the lower surface of the tail end of the diffusion flow passage, a second inclined surface is arranged on the lower surface of the flow dividing groove adjacent to the first inclined surface, and the first inclined surface and the second inclined surface extend upwards along the air flow direction in an inclined mode towards the same direction.

Through setting up the fire row for the diffusion runner, the splitter box that are linked together in proper order and give vent to anger the cavity, the terminal lower surface of diffusion runner is provided with first inclined plane, and the lower surface that the splitter box is adjacent first inclined plane is provided with the second inclined plane, and first inclined plane and second inclined plane are along the air current direction slope up extension towards same direction, can reduce the production of vortex group in the air current flow direction like this, promote the mixing of gas and air.

In some embodiments of the present application, the angle of inclination of the first inclined surface is not greater than the angle of inclination of the second inclined surface.

Through setting up less with the inclination on first inclined plane, the air current of the diffusion runner of being convenient for can be evenly dispersed at upper portion port, through setting up great with the inclination on second inclined plane, can effectually guide air current flow to the other end tip of splitter box, improve the homogeneity of the gas concentration distribution of the venthole top of fire row.

In some embodiments of the present application, the ratio of the inclination angle of the first inclined surface to the inclination angle of the second inclined surface is k, 0.5.ltoreq.k.ltoreq.1.0; the inclination angle of the first inclined surface is 11-14 degrees, and the inclination angle of the second inclined surface is 22-24 degrees.

In some embodiments of the present application, the inlet of the diffuser is the air inlet, and the air inlet is flare-shaped.

The air inlet is arranged in a horn mouth shape, so that gas and primary air can smoothly enter the diffusion flow passage.

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 diagram of a gas water heater according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another embodiment of a gas water heater according to the present utility model;

FIG. 3 is a schematic view of the structure of FIG. 2 in the direction A-A;

FIG. 4 is a schematic view of the partial enlarged structure of the area B in FIG. 3;

FIG. 5 is a schematic view of the internal structure of another embodiment of the gas water heater according to the present utility model;

FIG. 6 is a schematic view of an embodiment of a ventilation board and an adjustment board according to the present utility model;

FIG. 7 is a schematic view of an embodiment of a fire grate according to the present utility model;

fig. 8 is a schematic structural view of another embodiment of a fire grate provided by the present utility model.

Reference numerals illustrate:

1. a combustion chamber;

10. a ventilation board; 101. a first plate body; 102. a second plate body;

20. a third plate body; 201. a vent; 202. a front plate; 203. a first protection plate; 2031. a lower hem; 204. a first air interlayer; 205. a second protection plate; 206. a second air interlayer; 2. a burner;

30. discharging fire; 301. diffusing the flow passage; 3011. a first inclined surface; 3012. an air inlet; 302. a shunt channel; 3021. a second inclined surface; 303. an air outlet cavity;

40. a gas supply pipe;

50. an air supply assembly; 501. a first fan; 502. a second fan;

60. a heat exchanger;

70. an adjusting plate; 701. and adjusting the hole.

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," "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 should not 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; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be 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 exchanger, one end of the heat exchanger is communicated with a water supply pipeline, and the other end of the heat exchanger is communicated with a shower head or a tap and the like.

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

When the gas water heater works, cold water provided by the water supply pipeline flows into the heat exchanger, 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.

Referring to fig. 1 to 8, the present utility model provides a gas water heater including a housing, a combustion chamber 1, a burner 2, a heat exchanger 60, an air supply assembly 50, a gas supply system, and a water supply system.

The combustion chamber 1, the burner 2, the heat exchanger 60 and the air supply assembly 50 are arranged in a housing.

The combustion chamber 1 is provided with a ventilation plate 10, the ventilation plate 10 and the bottom of the combustion chamber 1 are enclosed to form an air inlet cavity, the ventilation plate 10 and the upper part of the combustion chamber 1 are enclosed to form a combustion cavity, wherein the heat exchanger 60 is arranged on the upper part of the combustion cavity, the ventilation plate 10 is provided with a plurality of ventilation openings 201 and a plurality of ventilation openings, and the ventilation openings are communicated with the air inlet cavity and the combustion cavity; the gas supply system supplies gas to the burner 2 through the vent 201;

the burner 2 is arranged in the combustion chamber 1 and is positioned at the bottom of the combustion cavity, the burner 2 is provided with an air inlet 3012, the burner 2 is used for burning fuel gas, and the air inlet 3012 of the burner 2 is connected with the ventilation opening 201;

the heat exchanger 60 is arranged at the top of the combustion chamber 1, the gas supply system comprises a gas supply pipe 40, the gas supply pipe 40 extends into the combustion chamber 1 and is positioned in the air inlet cavity, the ventilation plate 10 is positioned between the burner 2 and the gas supply pipe 40, a plurality of gas nozzles are arranged on the gas supply pipe 40, and the gas nozzles are in one-to-one correspondence with the ventilation openings 201; the nozzles deliver fuel gas via the inlet 3012 to the burner 2.

As shown in fig. 1 and 5, the air supply assembly 50 includes a first fan 501 and a second fan 502, the bottom end of the combustion chamber 1 is provided with a first air inlet and a second air inlet, the first air inlet and the second air inlet are both communicated with the air inlet cavity, the first fan 501 is configured to supply air to the air inlet cavity through the first air inlet, the second fan 502 is configured to supply air to the air inlet cavity through the second air inlet, the first fan 501 and the second fan 502 are arranged side by side along the length direction of the combustion chamber 1, and the first fan 501 and the second fan 502 are symmetrically arranged.

Specifically, by providing the combustion chamber 1, the burner 2, the gas supply pipe 40 and the air supply assembly 50, the ventilation board 10 is provided in the combustion chamber 1, the ventilation board 10 divides the combustion chamber 1 into an air intake cavity and a combustion cavity, and the first fan 501 and the second fan 502 operate simultaneously to provide primary air and secondary air required for combustion; the air smoothness in the air inlet cavity is improved, vortex is reduced, and the uniformity of secondary air distribution is improved; on the other hand, the amount of primary air entering the combustor 2 can be increased through the double-fan air supply, the uniformity of pressure distribution in the combustion chamber 1 is improved, fuel gas is combusted more uniformly and fully, the flame height is reduced, the whole heat exchanger 60 is in high-temperature flue gas, the direct combustion of flame to the heat exchanger 60 is avoided, and the scaling problem caused by local overheating of the heat exchanger 60 is improved.

Meanwhile, compared with the single-fan air supply, the double-fan air supply is adopted, the requirement on the air supply capacity of the single fan in the double-fan is relatively low, and the fan is in a state of low rotating speed, so that vibration of the fan is reduced, and on the other hand, the uniformly distributed secondary air improves the pressure distribution in the air inlet cavity and suppresses vibration caused by vortex masses.

Specifically, the water supply system comprises a total water inlet pipe, a heat exchanger 60, a bypass pipe and a total water outlet pipe, wherein one end of the total water inlet pipe is connected with a water inlet joint, the water inlet joint is communicated with a water source, the other end of the total water inlet pipe is connected with the heat exchanger 60 and the bypass pipe, the heat exchanger 60 exchanges heat with flue gas at the upper end of the combustion cavity, and the other end of the heat exchanger 60 and the bypass pipe are connected with the total water outlet pipe.

The water pump is arranged on the main water inlet pipe, the gas water heater further comprises a double-drive water servo and a controller, the double-drive water servo is arranged at the joint of the main water inlet pipe, the bypass pipe and the heat exchanger 60, the water flow entering the bypass pipe and the heat exchanger 60 can be controlled, and the double-drive water servo is electrically connected with the controller. The water outlet end of the heat exchanger 60 is provided with a temperature sensor which is electrically connected with a control unit, the temperature sensor is used for detecting the water outlet temperature of the heat exchanger 60 and transmitting the water outlet temperature to a controller, and the controller controls the double-drive water servo, so that the water inlet flow of the heat exchanger 60 and the water flow of a bypass pipe are accurately regulated, the temperature of water is secondarily regulated before water outlet, and the water outlet temperature is ensured to be constant.

Specifically, the first fan 501 and the second fan 502 are symmetrically arranged along the length direction of the combustion chamber 1, so that an air flow field with symmetrical distribution is formed in the air inlet cavity, generation of vortex is eliminated, uniformity of pressure distribution in the combustion cavity is improved, and combustion working conditions of fuel gas are improved.

As shown in connection with fig. 3, in some embodiments of the present application, ventilation board 10 includes a first board body 101, a second board body 102.

The first plate body 101 is provided with a plurality of first vent holes;

the second plate 102 is located below the first plate 101, and a plurality of second ventilation holes are formed in the second plate 102.

Specifically, by arranging the first plate body 101 and the second plate body 102, the second plate body 102 is positioned below the first plate body 101, so that the first plate body 101 and the second plate body 102 are convenient to match with the shape of the combustor 2, and the internal space of the combustion chamber 1 is beneficial to being fully utilized; through set up a plurality of first ventilation hole on first plate body 101, be equipped with a plurality of second ventilation hole on second plate body 102, first ventilation hole and second ventilation hole can balance the air current that first fan 501 and second fan 502 carried to the air inlet cavity, make the more even first ventilation hole and second ventilation hole that passes of air enter into the burning cavity to make the gas fully burn in the burning cavity.

As shown in connection with fig. 3, in some embodiments of the present application, the area of the second plate 102 is larger than the area of the first plate 101, and the opening ratio of the second plate 102 is larger than the opening ratio of the first plate 101.

Specifically, the area of the first plate 101 is smaller and the aperture ratio on the first plate is lower, so that when the air flows generated by the first fan 501 and the second fan 502 flow towards the direction of the first plate 101, the flame of the burner faces towards the vertical direction as much as possible, and is not diffused, the temperature of the front wall surface of the combustion chamber is ensured to be lower, and therefore the panel of the gas water heater is protected, and on the other hand, secondary air is provided for gas combustion; the second plate 102 has a larger area and a higher aperture ratio, so that most of the air flow in the air inlet cavity can be uniformly distributed and smoothly pass through the second ventilation holes to enter the combustion cavity.

In some embodiments of the present application, the air flows output by the first fan 501 and the second fan 502 pass through the ventilation openings into the air inlet 3012 to form primary air, and the air flows output by the first fan 501 and the second fan 502 pass through the first ventilation openings and the second ventilation openings to form secondary air.

Specifically, the airflows output by the first fan 501 and the second fan 502 are jointly introduced into the air inlet 3012 to form primary air, so that the amount of the primary air introduced into the combustor 2 can be increased, and the full combustion of fuel gas is facilitated; the air flows output by the first fan 501 and the second fan 502 pass through the first ventilation holes and the second ventilation holes to enter the combustion cavity to form secondary air, and the secondary air can play an auxiliary role in combustion of fuel gas; the stable combustion of the fuel gas is facilitated; in addition, generation of vortex can be reduced.

In some embodiments of the present application, ventilation board 10 further includes a third board body 20.

One end of the third plate 20 is connected to the first plate 101, the other end of the third plate 20 is connected to the second plate 102, and the ventilation opening 201 is provided in the third plate 20.

Specifically, the third plate 20 connects the first plate 101 and the second plate 102, so that the first plate 101, the second plate 102 and the third plate 20 form a zigzag bending structure, and space can be fully utilized according to the shape of the burner 2. By providing the vent 201 on the third plate 20, the inlet of the burner 2 is facilitated to enter the gas and the primary air.

In other embodiments of the present application, as shown in connection with FIG. 6, the gas water heater further includes a regulator plate 70.

The adjusting plate 70 is provided on the ventilation plate 10 near the gas supply pipe side, and a plurality of adjusting holes 701 are provided on the adjusting plate 70, the adjusting holes 701 are in one-to-one correspondence with the ventilation openings 201, and the adjusting plate 70 is configured to adjust the amount of air entering the burner 2.

Specifically, by providing the adjusting plate 70 on the ventilation plate 10, the adjusting plate 70 is provided with a plurality of adjusting holes 701, the adjusting holes 701 are in one-to-one correspondence with the ventilation openings 201, and the adjusting plate 70 can adjust the amount of primary air entering the burner 2 through the adjusting holes 701, so that the burner 2 can fully burn fuel gas.

It should be noted that the size of the adjusting hole 701 may be set according to practical situations.

In some embodiments of the present application, as shown in connection with fig. 7 and 8, the burner 2 includes a plurality of fire rows 30.

The fire grate 30 comprises a diffusion flow passage 301, a flow dividing groove 302 and an air outlet cavity 303 which are sequentially communicated, a first inclined surface 3011 is arranged on the lower surface of the tail end of the diffusion flow passage 301, a second inclined surface 3021 is arranged on the lower surface of the flow dividing groove 302 adjacent to the first inclined surface 3011, and the first inclined surface 3011 and the second inclined surface 3021 extend upwards in an inclined mode in the same direction along the air flow direction.

The top of the fire row 30 is provided with a plurality of air outlet holes (not marked) which are communicated with the air outlet cavity 303.

Specifically, the gas and the primary air are input into the fire row 30 corresponding to the burner 2 through the diffusion flow passage 301, and after the gas flow is conveyed to the end through the diffusion flow passage 301, the gas flow is guided to flow upwards through the inclination of the first inclined surface 3011, so that the occurrence of vortex groups at the end due to the change of the flow direction of the gas flow can be reduced.

After the airflow flows into the diversion trench 302 from the diffusion flow passage 301, the thickness of the diversion trench 302 is smaller, so that the airflow can be dispersed along the length direction of the fire row 30. When the splitter box 302 distributes airflow, due to the influence of the flow inertia of the airflow, the airflow is easy to directly flush the upper air outlet hole after changing the direction, so that uneven airflow distribution and even vortex are easy to occur at the end part of the upper part of the air inlet 3012 adjacent to the diffuser flow channel 301, and the efficiency and uniformity of mixing the fuel gas and the air are affected.

By arranging the second inclined surface 3021 on the lower surface of the shunt groove 302 adjacent to the first inclined surface 3011, the second inclined surface 3021 can guide the airflow in an inclined manner, and after the airflow flows into the shunt groove 302, the airflow can be better distributed towards the other end of the shunt groove 302 due to the inclined guiding of the second inclined surface 3021, so that vortex is reduced.

In some embodiments of the present application, as shown in connection with fig. 8, the angle of inclination of the first inclined surface 3011 is not greater than the angle of inclination of the second inclined surface 3021.

Specifically, the inclination angle of the first inclined surface 3011 is set smaller, so that the airflow of the diffusion flow channel 301 can be uniformly dispersed at the upper port; the second inclined surface 3021 has a larger inclination angle, and can effectively guide the airflow to flow to the end of the other end of the splitter box 302, thereby improving the uniformity of the gas concentration distribution above the gas outlet holes of the fire grate 30.

In some embodiments of the present application, the ratio of the inclination angle of the first inclined surface 3011 to the inclination angle of the second inclined surface 3021 is k, 0.5.ltoreq.k.ltoreq.1.0; the first inclined surface 3011 is inclined at an angle of 11 degrees to 14 degrees, and the second inclined surface 3021 is inclined at an angle of 22 degrees to 24 degrees.

The design of two inclined planes can make gas component distribution more even to enable the also effectual even optimization of air current velocity, through confirming the terminal angle of diffusion section and the corresponding relation of splitter box 302 lower extreme angle, effectively solve the inhomogeneous problem of component distribution, improve the component distribution homogeneity effect and show, make venthole mixed gas's component, speed homogeneity higher, flame stability is higher, can effectively promote gas heater work efficiency, and can effectively reduce the flame height when burning, and then reduce combustion chamber 1 height, reduce the volume of combustor 2.

Meanwhile, the double fans supply air, which provides a uniform combustion environment, is beneficial to improving the temperature field distribution in the combustion chamber 1, improves the uniformity of heating of the heat exchanger 60, and reduces the occurrence of scaling caused by local overheating of the heat exchanger 60.

In other embodiments of the present application, the inlet of the diffuser 301 is an inlet 3012, and the inlet 3012 is flared.

Specifically, by providing the air inlets 3012 in a flare shape, smooth entry of the fuel gas and the primary air into the diffuser flow passage 301 is facilitated.

In another embodiment of the present application, as shown in fig. 3, 4 and 5, in order to reduce heat dissipation of the combustion chamber 1, a first protection plate 203 is disposed on the inner side of a front plate 202 of the combustion chamber 1, a first air interlayer 204 (not labeled) is formed between the first protection plate 203 and the front plate 202, an upper hem is disposed on the edge of the first plate body 101 near the front plate 202, a plurality of first clamping grooves are disposed on the top of the upper hem, and the plurality of first clamping grooves can be used for installing a fire grate 30, and on the other hand, gaps exist between the upper hem and the front plate 202 to facilitate air flow passing through and reduce baking of the front plate 202 by the burner 2;

as shown in fig. 5, a lower edge 2031 is provided at a lower end of the first protection plate 203, and at least one row of third ventilation holes are provided on the lower edge 2031, and the third ventilation holes are configured to blow air into the first air interlayer 204.

In particular, since the high temperature smoke generated by the combustion of the burner 2 in the combustion chamber 1 radiates heat outside due to heat conduction, particularly the front panel of the housing is generally a decorative panel, and it is necessary to avoid long-time high temperature baking. And through setting up first guard plate 203 in the inside of combustion chamber 1, first guard plate 203 forms first air intermediate layer 204 with the front bezel 202 of combustion chamber 1 to, utilize the air current that first fan 501 and second fan 502 produced to further export through the third through-hole and then enter into in order to form the cold air isolation layer, and then realize thermal-insulated effect.

Similarly, a second protection plate 205 is disposed on the inner side of the rear plate of the combustion chamber 1, a second air interlayer 206 is formed between the second plate and the rear plate, the edge of the second plate 102 is abutted against the rear plate, the bottom of the second protection plate 205 is abutted against the second plate 102, and the second ventilation holes at the rear edge of the second plate 102 are also configured to blow air into the second air interlayer 206.

Specifically, for the back of the casing, in order to reduce heat leakage, a second air interlayer 206 is formed between the second protection plate 205 and the back of the combustion chamber 1, and air is delivered through a second ventilation hole corresponding to the bottom to form a cold air isolation layer.

It should be noted that, as shown in fig. 5, the upper ends of the first protection plate 203 and the second protection plate 205 are provided with ventilation holes, so that when the air flows in the first air interlayer 204 and the second air interlayer 206 reach the upper ends of the first protection plate 203 and the second protection plate 205, the air flows enter the upper end of the combustion chamber 1 from the ventilation holes.

Similarly, the inner containers of the two side plates of the combustion chamber 1 are respectively provided with a third protection plate, and a third air interlayer is formed between the third protection plates and the corresponding side plates; the second ventilation holes at both side edges of the second plate body 102 are further configured to blow toward the inside of the third air interlayer, and the first ventilation holes at both side edges of the first plate body 101 are further configured to blow toward the inside of the third air interlayer.

By arranging the air interlayer region around the combustion chamber 1, heat conduction to the side wall of the combustion chamber 1 can be effectively reduced due to low heat conductivity of air in the air interlayer region, and finally, heat conduction to the shell is reduced. Meanwhile, because the air in the air interlayer region is heated, the cold air at the bottom can quickly flow into the air interlayer region by utilizing the principle of rising hot air, so that the heat in the air interlayer region is effectively taken away, and the heat dissipation efficiency is further effectively improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims (10)

1. A gas water heater, comprising:

the combustion chamber is internally provided with a ventilation plate, the ventilation plate and the bottom of the combustion chamber enclose to form an air inlet cavity, the ventilation plate and the upper part of the combustion chamber enclose to form a combustion cavity, the ventilation plate is provided with a plurality of ventilation openings and a plurality of ventilation openings, and the ventilation openings are communicated with the air inlet cavity and the combustion cavity;

the burner is arranged in the combustion cavity, and an air inlet of the burner is connected with the ventilation opening;

the gas supply pipe is arranged in the air inlet cavity, and a plurality of air nozzles are arranged on the gas supply pipe and correspond to the ventilation openings one by one; and, a step of, in the first embodiment,

the air supply assembly comprises a first fan and a second fan, the air outlets of the first fan and the second fan are communicated with the air inlet cavity, and the first fan and the second fan are arranged side by side along the length direction of the combustion chamber.

2. The gas water heater of claim 1, wherein the first fan and the second fan are symmetrically arranged along a length of the combustion chamber.

3. The gas water heater of claim 1, wherein the vent holes comprise a first vent hole and a second vent hole, the vent plate comprising:

the first plate body is provided with a plurality of first vent holes; and, a step of, in the first embodiment,

the second plate body is positioned below the first plate body, and a plurality of second ventilation holes are formed in the second plate body.

4. A gas water heater according to claim 3, wherein the second plate has an area greater than the first plate and an open porosity greater than the first plate.

5. A gas water heater according to claim 3, wherein the ventilation plate further comprises:

the third plate body, the one end of third plate body with first plate body is connected, the other end of third plate body with the second plate body is connected, the vent set up in on the third plate body.

6. The gas water heater of claim 1, further comprising:

the adjusting plate is arranged on the ventilating plate close to the side of the gas supply pipe, a plurality of adjusting holes are formed in the adjusting plate, the adjusting holes correspond to the ventilation openings one by one, and the adjusting plate is configured to adjust the amount of air entering the combustor.

7. A gas water heater according to any one of claims 1 to 6, wherein the burner comprises:

the fire grate comprises a diffusion flow passage, a flow dividing groove and an air outlet cavity which are sequentially communicated, a first inclined surface is arranged on the lower surface of the tail end of the diffusion flow passage, a second inclined surface is arranged on the lower surface of the flow dividing groove adjacent to the first inclined surface, and the first inclined surface and the second inclined surface extend upwards along the direction of air flow towards the same direction in an inclined mode.

8. The gas water heater of claim 7, wherein the angle of inclination of the first inclined surface is no greater than the angle of inclination of the second inclined surface.

9. The gas water heater according to claim 8, wherein a ratio of an inclination angle of the first inclined surface to an inclination angle of the second inclined surface is k, 0.5.ltoreq.k.ltoreq.1.0; the inclination angle of the first inclined surface is 11-14 degrees, and the inclination angle of the second inclined surface is 22-24 degrees.

10. The gas water heater of claim 7, wherein the inlet of the diffuser is the inlet, and the inlet is flared.