CN213578068U

CN213578068U - Gas water heater

Info

Publication number: CN213578068U
Application number: CN202022514020.4U
Authority: CN
Inventors: 李为臻; 刘娣
Original assignee: Red Heat Combustion Technology Dalian Co ltd
Current assignee: Red Heat Combustion Technology Dalian Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-29
Anticipated expiration: 2030-11-03

Abstract

The utility model provides a gas water heater. The utility model discloses a casing that is equipped with air inlet and outlet flue, the fan, the gas valve, the tobacco pipe, the controller and set up the gaseous water conservancy diversion mechanism in the casing, the burning head, the ignition needle, flame detector and heat exchanger, the burning head includes the main frame body and surely fires the median, surely fire the median and divide the main frame body inside into two at least regions of ventilating along the gas passage direction, all be equipped with a plurality of partition mechanisms in the region of ventilating, partition mechanism will ventilate the region and divide into a plurality of through-holes of arranging along the gas passage direction, the long through-hole is used for through mixing gas in advance and strengthening the mixed effect of the two, surely fire the median and can separate the burning flame of main frame body combustion face for mutually independent individual flame. The utility model discloses a microporous structure has strengthened the mixed degree of gas and air promptly, makes the burning more abundant, also can keep the one-way transmission of flame, has the effect of fire-retardant anti-backfire, and each ventilation zone after the partition burns more stably, and the pollutant of emission is few.

Description

Gas water heater

Technical Field

The utility model relates to a gas water heater.

Background

As a household appliance which is commonly used, the safety performance of the gas water heater and chemical components in combustion smoke become important indexes for measuring the performance of the gas water heater.

The power of the water heater is 20-30 kW; the fuel gas and part of air blown by the fan enter the fire grate and are sprayed out from the small holes, after ignition, rich-combustion premixed flame is formed, and the fuel which is not completely combusted and the rest of air sprayed out from the fire grate gap are continuously subjected to diffusion combustion. In the traditional pipe type fire grate, the gas injects primary air to enter a pipe structure and mix, and the premixed gas is ignited and then contacts with secondary air through diffusion to complete the combustion process, so that the structure is simple, the technology is mature, the cost is low, but the emission concentration of CO and NOx is high; the fire grate structure of the thick and thin fire grate is similar to a pipe type fire grate, and NOx is reduced into N by producing reducing atmosphere through staged combustion₂The purpose of reducing nitrogen is achieved, but the structure is complex, the cost is high, and although the NOx emission concentration is low, the CO emission concentration is high; the water-cooling fire grate is mainly a combination of a traditional fire grate and a water-cooling copper pipe, reduces flame temperature through heat exchange to realize nitrogen reduction, and has mature technology, high cost, low NOx emission concentration, complex structure and high CO emission concentration; the main body of the full premix metal fiber surface burner is a temperature-resistant metal fiber net, a full premix fan and a valve group are required to be matched for use, local high temperature is avoided by shortening flame length, combustion time is reduced to reduce nitrogen, and although NOx and CO emission concentration is low, the full premix metal fiber surface burner has the defects of high cost and burner blockage and backfire risks.

Since the rapid combustion of the fuel gas generates toxic gases such as nitrogen oxides and carbon monoxide, the health and life safety of users are affected, and the emission of flue gas containing the above pollutants causes environmental pollution. For this reason, low-emission burners have been developed to control the emission of nitrogen oxides in flue gases. How to effectively reduce the content of toxic and harmful gases such as nitric oxide, carbon monoxide and the like in the flue gas discharged by the gas water heater is also a problem which needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In accordance with the above-mentioned technical problem, a gas water heater is provided. The utility model discloses a technical means as follows:

a gas water heater comprises a shell provided with an air inlet and a smoke outlet, a fan, a gas valve, a smoke tube, a controller, a gas flow guide mechanism, a combustion head, an ignition needle, a flame detector and a heat exchanger, wherein the gas flow guide mechanism, the combustion head, the ignition needle, the flame detector and the heat exchanger are arranged in the shell, the fan is used for providing air required by gas combustion, the gas valve is used for controlling the on-off and flow of gas, the controller is used for controlling the rotating speed of the fan and the on-off and flow of the gas valve, the air inlet and the input end of the combustion head form a pressure equalizing cavity, the air and the gas provided by the fan and the gas valve are uniformly distributed through the gas flow guide mechanism, the ignition needle is arranged at the output end of the combustion head and is used for igniting premixed gas, the flame detector is arranged at the output end of the combustion head and is used for detecting whether stable flame is formed or not, the output end of the combustion, the combustion head comprises a main frame body and at least one stable combustion isolation belt, the stable combustion isolation belt divides the inside of the main frame body into at least two ventilation areas along the direction of a gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanisms divide the ventilation areas into a plurality of through holes which are distributed along the direction of the gas channel, the through holes are used for passing through pre-mixed gas and strengthening the mixing effect of the pre-mixed gas and the gas channel, and the stable combustion isolation belt can divide combustion flame of the combustion surface of the main frame body into mutually independent flames.

Further, the air outlet of the fan is connected to the air inlet of the shell, the fuel gas outlet of the fuel gas valve is connected to the front of the air inlet or the rear of the air outlet of the fan, and the smoke tube is connected to the smoke outlet of the shell.

Or, the air inlet of the fan is connected to the smoke outlet of the shell, the smoke tube is connected to the air outlet of the fan, and the fuel gas outlet of the fuel gas valve is connected to the back of the air inlet of the shell.

Furthermore, the stable combustion isolation belt is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length; the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.

Further, the cross-sectional area S of the single through-hole_Hole(s)Is 0.1mm²≤S_Hole(s)≤9mm²(ii) a The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm²≤Sn≤22500mm²。

Further, the wall thickness of the holes, i.e. the thickness of the separating means, is 0.03 mm. ltoreq. d_Hole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than d_{Outer cover}Less than or equal to 50 mm; the thickness/height h of the ventilation area satisfies h is more than or equal to 4mm and less than or equal to 1000 mm.

Further, the width D of the stable combustion isolation belt₁The total length of 3-10 through holes, the stable combustion isolation belt is continuous or discontinuous, and the width D of the discontinuous section is₂The total length of 1-2 through holes.

Furthermore, the width D of the stable combustion isolation belt is larger than or equal to 2mm and smaller than or equal to 50 mm.

The utility model discloses burning part's power can be along with the combustor area change, mixes gas in advance and gets into behind the micropore passageway by high misce bene, lights from micropore passageway blowout after and forms even premixed flame, and the setting up of median makes mutual independence between the flame, and flame after the partition forms type pyramid (flame personally submits hollow toper), and flame is more stable, effectively avoids forming the indefinite even flame that floats, and the burning is stable, the utility model discloses a micropore density is great, and the aperture receives the restriction, and the confined space in the aperture has the rectification effect, can carry out fine mixture with gas and air, and CO and NOx discharge all very low in the burning gas, below 10ppm, and is clean high-efficient, satisfies nitrogen oxide's emission restriction volume completely. Meanwhile, the arrangement of the small holes has the function of backfire prevention. The micro-channel structure in the field of catalyst carriers is applied to the field of combustion, the large-scale reconstruction of the existing appliance is not needed, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a concrete structural schematic diagram of the overall structure of the gas water heater in embodiment 1 of the present invention.

Fig. 2 is a concrete structural schematic diagram of the overall structure of the gas water heater in embodiment 2 of the present invention.

Fig. 3 is a concrete structural schematic diagram of the overall structure of the gas water heater in embodiment 3 of the present invention.

Fig. 4 is a specific structural schematic diagram of the overall structure of the gas water heater according to embodiment 4 of the present invention.

Fig. 5 is a schematic view of a simple structure of a burner head according to embodiment 5 of the present invention.

Fig. 6 is a schematic view of a simple structure of a burner head according to embodiment 6 of the present invention.

Fig. 7 is a schematic view of a simple structure of a burner head according to embodiment 7 of the present invention.

Fig. 8 is a schematic view of a simple structure of a burner head according to embodiment 8 of the present invention.

Fig. 9 is a schematic perspective view of a burner head according to embodiment 9 of the present invention.

Fig. 10 is a non-continuous state diagram of a stable combustion isolation belt.

In the figure: 1. a fan; 2. a gas valve; 3. a housing; 4. a gas mixing structure; 5. a flow guide mechanism 6 and a combustion head; 7. an ignition needle; 8. a flame detector; 9. a heat exchanger; 10. a smoke pipe; 101. an air inlet 102 and a pressure equalizing cavity; 103. a combustion chamber; 104. a smoke outlet; 11. a main frame body; 12. a through hole; 13. stably burning the isolation belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment discloses a gas water heater, which comprises a shell 3 provided with an air inlet 101 and a smoke outlet 104, a fan 1, a gas valve 2, a smoke pipe 10, a controller, and a gas flow guide mechanism 5, a combustion head 6, an ignition needle 7, a flame detector 8 and a heat exchanger 9 which are arranged in the shell, wherein the fan 1 is used for providing air required by gas combustion, the gas valve 2 is used for controlling the on-off and flow of the gas, the air inlet 101 and the input end of the combustion head form a pressure equalizing cavity 102, the air and the gas provided by the fan and the gas valve are uniformly distributed through the gas flow guide mechanism 5, the ignition needle 7 is arranged at the output end of the combustion head 6 and used for igniting premixed gas, the flame detector 8 is arranged at the output end of the combustion head and used for detecting whether stable flame is formed or not, the output end of the combustion head is a combustion cavity 103, the heat exchanger 9 is used for absorbing the heat of the high temperature flue gas in the combustion chamber and gives the water in the coil with the heat transfer, wherein, the combustion head includes main frame body 11 and at least one surely fires median 13, surely fire the median and divide main frame body inside into two at least regions of ventilating along the gas passage direction, all be equipped with a plurality of partition mechanisms in each region of ventilating, partition mechanism should ventilate regional division into a plurality of through-holes 12 of arranging along the gas passage direction, the through-hole is used for passing through premixed gas strengthens the mixed effect of the two, surely fire the median and can separate the burning flame of main frame body combustion face for mutually independent individual flame.

As shown in fig. 1, in embodiment 1, after the gas outlet 4 of the gas valve 2 is connected to the air outlet of the fan, the smoke tube 10 is connected to the smoke outlet 104 of the housing 3, the mixture of air and gas enters the pressure equalizing chamber 102 through the flow guiding mechanism 5, and then is rectified and mixed by the burner head 6, and then is ejected through the through hole 12 of the ventilation area isolated by the stable combustion isolation belt 13, and after ignition, an independent flame is formed.

As shown in fig. 2, the gas outlet 4 of the gas valve 2 of embodiment 2 is connected to the front of the air inlet of the fan, the smoke tube 10 is connected to the smoke outlet 104 of the housing 3, the mixture of air and gas enters the pressure equalizing chamber 102 through the flow guiding mechanism 5, and then is rectified and mixed by the burner head 6, and then is ejected through the through holes 12 of the ventilation area isolated by the stable combustion isolation belt 13, and after ignition, an independent flame is formed.

As shown in fig. 3, in embodiment 3, the air inlet of the blower 1 is connected to the smoke outlet 104 of the housing 3, the smoke tube 10 is connected to the air outlet of the blower, and the gas outlet of the gas valve 2 is connected to the front of the air inlet 101 of the housing.

As shown in fig. 4, in embodiment 4, the air inlet of the blower 1 is connected to the smoke outlet 104 of the housing 3, the smoke tube 10 is connected to the air outlet of the blower, and the gas outlet of the gas valve 2 is connected to the back of the air inlet 101 of the housing.

The gas water heater disclosed by the embodiment can be installed and used in a vertical upward mode as shown in fig. 1-4, and can also be installed in a vertical downward mode or rotated at any angle, so that the beneficial effects can be achieved.

The utility model discloses a method for forming the specific structure of the combustion head, which comprises a plurality of methods, for example, the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.

When the mixed gas of air and fuel gas is input into the gas channel in the main frame body, the air inlet has many directions, if the area of the ventilation area is too large, the flame-connecting phenomenon is easy to occur, so that a single ventilation area with enough small area and the cross-sectional area S of a single through hole need to be ensured_Hole(s)Is 0.1mm²Less than or equal to S hole and less than or equal to 9mm²According to the different or other factors that probably influence of manufacturing process, there is certain defective percentage, the hole is not of uniform size, or wherein the specification in the hole of certain quantity surpasss the utility model discloses the scope of recording all can be deeming to be in the utility model discloses in the protection scope. The thickness/height h of the ventilation area satisfies that h is not less than 4mm and not more than 1000mm, the height of different through holes can be the same or different, the upper and lower face can be planar or non-planar, but need can guarantee that gas and air mixture enter into behind the micropore, receive the restriction of pore volume, gas mixture can constantly collide the mixture in the pore wall of micropore, make gas passage's output, gas output direction is the straight line, the micropore has played the effect of mixing and rectification in this process, the combustion efficiency of flame has further been strengthened.

The width D of the stable combustion isolation belt is larger than or equal to 2mm and smaller than or equal to 50 mm.

The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm²≤S(n)≤22500mm²。

The thickness of the hole wall, i.e. the thickness of the separating means, is not less than 0.03mm_Hole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than d_{Outer cover}≤50mm。

Fig. 5 shows the shape of the combustion component of embodiment 5, the main frame body of the combustion component is rectangular, the internal combustion stabilizing isolation strip is in a long strip shape, the inside of the rectangle is divided into a plurality of uniform areas, the flames of adjacent hole pieces are changed into pyramid shapes (the flames are in hollow conical shapes), as shown in fig. 10, in other optional embodiments, the areas divided inside the rectangle may be unequal in area, the combustion stabilizing isolation strip may also be discontinuous, but it needs to be ensured that the width D1 of the combustion stabilizing isolation strip is the total length of 3-10 through holes, and the width D2 of the discontinuous section is the total length of 1-2 through holes. The spacer may be linear as shown or may be of other regular or irregular shape, but it is desirable to have a spacer.

Fig. 6 shows the shape of the combustion part of example 6, in which the main frame is circular, the combustion stabilizing isolation zone at the center is circular, and the outer circle is connected to the main frame through a plurality of combustion stabilizing isolation zones to divide the region into predetermined shapes.

FIG. 7 shows the shape of a combustion part of example 7, in which the main frame is circular and the inside is divided by a plurality of stable combustion isolation zones.

FIG. 8 shows the shape of the combustion part of example 8, in which the main frame is circular, the ventilation area is annular, and the inside is divided by a plurality of stable combustion isolation zones.

FIG. 9 shows the shape of the combustion part of example 9, in which the main frame is circular, the ventilation area is circular, and the inside is divided by a plurality of stable combustion isolation zones.

Above-mentioned surely fire arrangement form of median includes the multiple, if attached in main frame body surface, or run through in main frame body thickness direction, or stretch into the internal length of predetermineeing of main frame, the main objective is separated main frame body, traditional forced draught blower/air exhauster is at the in-process of inputing the internal gas passage of main frame with the gas, the screw action of fan makes the wind of output fast at the local area velocity of flow, the local area velocity of flow is slow, make flame float indefinite, thereby lead to the burning incomplete, and the utility model discloses a set up surely fire the median, separate main frame body for a plurality of blocks, although adjacent block combustion power still has the difference, but adjacent flame can not be influenced, can realize stable burning.

The utility model discloses the material of burning part includes non-metallic material and metal material, for example, non-metallic material can select honeycomb ceramics for use, simultaneously, what need explain is that, current honeycomb ceramics porous burner applied principle is downthehole burning, with the utility model discloses a principle is different (honeycomb ceramics porous structure, the burning is gone on with the flame form earlier, the ceramic plate is by flame heating back, the burning returns to in the pore and accomplishes in the pore, the combustor is red hot state, produces a large amount of infrared radiation, also known as infrared burner, this combustor explodes easily through rapid cooling and rapid heating, and combustion power is limited, can't be used as high-power heater.)

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A gas water heater is characterized by comprising a shell provided with an air inlet and a smoke outlet, a fan, a gas valve, a smoke pipe, a controller, a gas flow guide mechanism, a combustion head, an ignition needle, a flame detector and a heat exchanger, wherein the gas flow guide mechanism, the combustion head, the ignition needle, the flame detector and the heat exchanger are arranged in the shell, the fan is used for providing air required by gas combustion, the gas valve is used for controlling the on-off and the flow of the gas, the air inlet and the input end of the combustion head form a pressure equalizing cavity, the air and the gas provided by the fan and the gas valve are uniformly distributed through the gas flow guide mechanism, the ignition needle is arranged at the output end of the combustion head and is used for igniting premixed gas, the flame detector is arranged at the output end of the combustion head and is used for detecting whether stable flame is formed or not, the output end of the combustion head is a combustion cavity, the heat exchanger, the combustion head comprises a main frame body and at least one stable combustion isolation belt, the stable combustion isolation belt divides the inside of the main frame body into at least two ventilation areas along the direction of a gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanisms divide the ventilation areas into a plurality of through holes which are distributed along the direction of the gas channel, the through holes are used for passing through pre-mixed gas and strengthening the mixing effect of the pre-mixed gas and the gas channel, and the stable combustion isolation belt can divide combustion flame of the combustion surface of the main frame body into mutually independent flames.

2. The gas water heater of claim 1, wherein the air outlet of the blower is connected to the air inlet of the housing, the gas outlet of the gas valve is connected to the front of the air inlet or the rear of the air outlet of the blower, and the smoke tube is connected to the smoke outlet of the housing;

alternatively, the first and second electrodes may be,

the air inlet of the fan is connected to the smoke outlet of the shell, the smoke tube is connected to the air outlet of the fan, and the fuel gas outlet of the fuel gas valve is connected to the back of the air inlet of the shell.

3. The gas water heater according to claim 1 or 2, wherein the stable combustion isolation belt is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length; the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.

4. Gas water heater according to claim 3, characterized in that the cross-sectional area S of a single through hole_Hole(s)Is 0.1mm²≤S_Hole(s)≤9mm²(ii) a The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm²≤Sn≤22500mm²。

5. A gas water heater according to claim 3, wherein the wall thickness of the hole, i.e. the thickness of the separating means, is 0.03mm ≤ d_Hole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than d_{Outer cover}Less than or equal to 50 mm; the thickness/height h of the ventilation area satisfies h is more than or equal to 4mm and less than or equal to 1000 mm.

6. The gas water heater of claim 3, wherein the width D of the combustion stabilizing isolation strip₁3 to 10 ofThe total length of the through hole, the stable combustion isolation belt is continuous or discontinuous, and the width D of the discontinuous section₂The total length of 1-2 through holes.

7. The gas water heater of claim 3, wherein the width D of the stable combustion isolation belt is 2mm or more and 50mm or less.