CN114198747B

CN114198747B - Burner

Info

Publication number: CN114198747B
Application number: CN202111550650.XA
Authority: CN
Inventors: 徐建波
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-11-28
Anticipated expiration: 2041-12-17
Also published as: CN114198747A

Abstract

The application relates to a combustor, which comprises a furnace end, a blower, a gas assembly and a furnace plate, wherein a premixing cavity is formed in the furnace end, the blower is used for introducing air into the premixing cavity, the gas assembly is used for introducing gas into the premixing cavity, the furnace plate is arranged in the furnace end and positioned at the upper part of the premixing cavity, the combustor also comprises a regulator which can regulate the air outlet quantity of the blower according to the gas flow of the gas assembly, and adapt the air quantity and the air outlet quantity, and can adapt the air quantity and the air quantity, so that the air quantity and the air quantity are in a better proportion, excessive air or excessive gas is avoided, the premixing effect of the gas and the air is good, the combustion is more sufficient, the thermal efficiency is higher, the combustor stably works, and noise such as whistle and resonance of the combustor is suppressed, namely the combustor can work with low noise even if no silencing part such as a silencing plate is arranged.

Description

Burner

Technical Field

The present application relates to a burner.

Background

Almost all infrared burners on the market today that use blowers are external circulation burners, i.e. blower burners. The heat discharged by combustion is absorbed by the heat absorbing material, so that the heat absorbing material generates high temperature, and the heat absorbing material radiates to a heating device (such as a cooker) so as to achieve the purpose of heating. However, the heat efficiency of the burner can only reach forty percent, and the burner is more than twenty percent higher than that of a common burner, but the burner has a complex structure and high use failure rate.

At present, the internal circulation infrared burner is free of a blower, and only has an atmospheric infrared burner, so that the power of the internal circulation infrared burner can be only small, if the internal circulation infrared burner is large, the volume of the internal circulation infrared burner is large, and the practical value of the internal circulation infrared burner is low.

In order to solve the above problems, the present inventors devised a burner, and a burner disclosed in chinese patent application publication No. CN202110670425.3 (publication No. CN113357629 a), comprising a burner plate, a burner and a gas nozzle, wherein a premix chamber is formed inside the burner, the gas nozzle is communicated with the premix chamber, the burner plate is disposed in the burner and located at the upper part of the premix chamber, a plurality of through holes penetrating the wall thickness thereof are disposed on the burner plate, a muffler plate is transversely disposed in the premix chamber, the muffler plate is located below the burner plate, and a plurality of muffler holes penetrating the wall thickness thereof are disposed on the muffler plate.

The burner designed by the present inventors has a high thermal efficiency, but the applicant has sought a burner involving fewer parts, lower cost and higher thermal efficiency.

Disclosure of Invention

The application aims to solve the technical problem of providing a burner which does not need to be provided with a muffler plate and has low noise.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a combustor, includes furnace end, air-blower, gas subassembly and stove plate, the inside premix chamber that is formed with of furnace end, the air-blower is arranged in to the air-in the premix chamber, the gas subassembly is arranged in to the gas-in the premix chamber, the stove plate sets up in the furnace end and is located the upper portion in premix chamber, its characterized in that: the burner further comprises a regulator which can regulate the air outlet of the blower according to the gas flow of the gas assembly so that the gas flow and the air outlet are matched.

In the above scheme, in order to enable the regulator to accurately regulate the gas quantity and the air quantity to be matched, the gas assembly comprises a gas source, a gas nozzle and a gas valve arranged on a gas channel between the gas source and the gas nozzle and used for controlling the gas flow, and the gas nozzle is communicated with the premixing cavity;

the regulator comprises a sensor and a controller, wherein the sensor is connected with the input end of the controller, the output end of the controller is connected with a motor of the blower, the sensor is an angle sensor capable of detecting the opening angle of the gas valve or a flow sensor capable of detecting the gas flow in the conveying pipeline, and the controller can control the voltage of the motor of the blower and/or the working frequency of the motor according to the signals of the sensor. The controller can adjust the wind pressure of the blower according to the gas quantity in real time, so that the air quantity and the gas quantity are always in the optimal ratio.

Preferably, the pressure of the mixture in the premixing cavity at the burner plate is required to ensure that the gas combustion speed is greater than the flashback combustion speed, so that the burner can be applied to all infrared combustion burner plates.

In order to improve the heating effect of the cookware, the top of the burner is also provided with a bracket for placing the cookware, the bracket can move up and down relative to the burner, and the bracket is fixed with the burner through a connecting piece after moving in place. Thus, the distance between the cooker and the stove plate is adjustable, so that the cooker is in an optimal heated position.

The support can have multiple structural forms, for example includes a plurality of L shape's support unit of following furnace end circumference interval arrangement, and simple structure, the support is cyclic annular, the lower part cover of support is established on the furnace end, be equipped with first connecting hole on the support, be equipped with the second connecting hole that can correspond with first connecting hole on the furnace end, the connecting piece passes first connecting hole and second connecting hole in order to fix support and furnace end mutually, first connecting hole or second connecting hole have at least two and upper and lower interval setting.

Or, the support is annular, the lower part of the support is sleeved on the furnace end, a first connecting hole is formed in the support, a second connecting hole which can correspond to the first connecting hole is formed in the furnace end, the connecting piece penetrates through the first connecting hole and the second connecting hole to fix the support and the furnace end, and the first connecting hole and/or the second connecting hole are vertically-extending long holes. After the bracket is moved to a proper height, the corresponding first connecting hole and second connecting hole are fixed.

In order to prevent the phenomenon of uneven combustion flame, a first plate body positioned below the furnace plate is transversely arranged in the premixing cavity, the first plate body is arranged close to the upper part of the premixing cavity, and a flow channel for flowing out of mixed gas is formed between the outer peripheral edge of the first plate body and the inner wall of the furnace end. Thus, because the first plate body is blocked, the mixed gas can be scattered to the bottom of the furnace plate along the peripheral edge of the first plate body, so that flame is uniformly combusted, and the phenomenon of unilateral combustion is avoided.

Preferably, the axis of the first plate body is coincident with the axis of the furnace plate, so that the mixture can flow more uniformly to the furnace plate.

In order to further enable the mixed gas to uniformly flow to the furnace plate, a second plate body positioned below the first plate body is arranged in the premixing cavity, the second plate body is transversely arranged, the periphery edge of the second plate body is in contact with the inner wall of the furnace end, and an air passing hole is formed in the position, adjacent to the center, of the second plate body. Thus, the mixed gas can be blocked by the second plate body, and the mixed gas is gathered to the gas passing holes and flows out, and then is dispersed along the peripheral edge of the first plate body, so that the uniformity of the gas flow is better.

The air blower directly blows air into the premixing cavity to cause more chaotic air flow in the premixing cavity, the burner further comprises a pipe body with one open end, the open end of the pipe body is communicated with the premixing cavity of the burner, and an air inlet communicated with the air outlet end of the air blower is formed in the pipe body;

the gas nozzle is arranged in the gas conditioning chamber. Air firstly enters the pipe body for compression, then flows out through the air inlet holes and then enters the air regulating chamber for expansion, at the moment, the air flow is straightened and mixed with the fuel gas, and finally flows out through the air outlet holes for compression, so that the fuel gas and the air are primarily mixed, and then enter the premixing cavity for further mixing, and the mixing uniformity of the fuel gas and the air is improved.

In order to form the gas regulating chamber in the body, along the flow direction of the air flow in the body, the body is internally provided with a first baffle and a second baffle at intervals in sequence, the second baffle faces the open end of the body, the gas regulating chamber is defined between the first baffle, the second baffle and the inner wall of the body, a plurality of first through holes are formed in the first baffle so as to form the gas inlet holes, and a second through hole for the mixed gas to flow out is formed in the second baffle so as to form the gas outlet holes. In addition, a plurality of first through holes are formed in the first partition plate, so that air can uniformly flow into the air conditioning chamber through the first through holes.

Preferably, the second through hole corresponds to the gas nozzle, so that the gas flow smoothly flows out.

Compared with the prior art, the application has the advantages that: the application designs the regulator, which can adapt the air quantity and the gas quantity, and the air quantity and the gas quantity are in a better proportion, and the application has the advantages of no excessive air or excessive gas, good premixing effect of the gas and the air, more sufficient combustion, higher thermal efficiency, stable operation of the burner, suppression of noise such as whistle and resonance of the burner, i.e. even if no silencing part such as a silencing plate is arranged, the burner can operate with low noise.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present application;

FIG. 2 is a cross-sectional view of the tube of FIG. 1;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a B-B cross-sectional view of FIG. 2;

fig. 5 is a schematic structural view of the first separator.

Fig. 6 is a schematic diagram of the operation of the regulator.

Detailed Description

The application is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 5, the burner of the present preferred embodiment includes a burner 1, a blower 2 for introducing air into the premix chamber 11, a gas assembly for introducing gas into the premix chamber 11, a burner plate 3 provided in the burner 1 and located at an upper portion of the premix chamber 11, and a regulator 4, wherein the premix chamber 11 is formed inside the burner 1.

The gas assembly comprises a gas source 51, a gas nozzle 52 and a gas valve 53, wherein the gas valve 53 is arranged on a gas channel 54 between the gas source 51 and the gas nozzle 52, the gas valve 53 is used for controlling the gas flow, and the gas nozzle 52 is communicated with the premixing cavity 11.

As shown in fig. 6, the regulator 4 can regulate the air output of the blower 2 according to the gas flow rate of the gas assembly, so that the gas flow rate and the air output are adapted. The regulator 4 includes a sensor and a controller, the output end of the sensor is connected with the input end of the controller, and the output end of the controller is connected with the motor of the blower 2. In this embodiment, the sensor adopts an angle sensor, and can detect the opening angle of the gas valve 53 and send a signal to the controller, and the controller determines the gas conduction angle according to the opening angle of the gas valve 53, further determines the gas flow, and adjusts and controls the motor voltage of the blower 2 through the gas flow, thereby controlling the air output of the blower 2. Of course, the operating frequency of the motor of the blower 2 may be adjusted according to the gas flow rate to adjust the air output rate; or the voltage and the working frequency of the motor of the blower 2 are simultaneously adjusted according to the gas flow rate to adjust the air output.

That is, when the gas flow rate increases, the voltage of the motor of the blower 2 and/or the operating frequency of the motor increases, and the air output of the blower increases accordingly. However, the types and the styles of the furnace plates are different, so that the effect is achieved under the same gas flow, the air output of the fan is different, but for the burner determined by the furnace plates, the ratio between the gas flow and the air output can be determined through experiments, and then the ratio is set in the controller. Therefore, no furnace plate is adopted, and the corresponding proportion is selected finally for the purpose of eliminating noise such as whistle and resonance when the burner burns. Of course, the sensor may also be a flow sensor, i.e. a motor voltage of the blower 2 is directly regulated and controlled in dependence of the gas flow.

The controller can adopt a circuit formed by the existing chips, and can also adopt the existing PLC controller or PC.

In addition, the pressure of the mixture in the premixing cavity 11 at the burner plate 3 needs to ensure that the gas combustion speed is higher than the tempering combustion speed, so that the burner can be suitable for all infrared combustion burner plates. In particular, the pressure in any flow path, whether air, gas or a mixture of both, needs to be able to ensure that the gas combustion speed at the burner plate 3 is greater than the flashback combustion speed. Because of the design of the gas flow passage section of the burner, the gas flow pressure is reduced along with the flow of the gas flow, so that the gas flow pressure is minimum when the gas flows to the furnace plate 3, and the gas flow pressure of other sections can meet the requirement as long as the gas flow pressure can ensure that the gas combustion speed is higher than the flashback combustion speed.

As shown in fig. 1, the top of the burner 1 is further provided with a bracket 6 for placing a pot, the bracket 6 can move up and down relative to the burner 1, and the bracket 6 is fixed with the burner 1 through a connecting piece 61 after moving in place. Thus, the distance between the cooker and the stove plate 3 is adjustable, so that the cooker is in the optimal heating position.

In this embodiment, the support 6 is annular, the lower portion of the support 6 is sleeved on the burner 1, the support 6 is provided with a first connecting hole 60, the burner 1 is provided with a second connecting hole 10 corresponding to the first connecting hole 60, the connecting piece 61 passes through the first connecting hole 60 and the second connecting hole 10 to fix the support 6 and the burner 1, and the first connecting hole 60 is provided with at least two and up-down intervals. After the bracket 6 is moved to a proper height, the corresponding first and second connection holes 60 and 10 are fixed.

Of course, the first connection hole 60 may be designed as one, and the second connection hole 10 may be designed as at least two spaced apart from each other. The connection member 61 may be a bolt and the second connection hole 10 may be a screw hole. Alternatively, the first connection hole 60 and the second connection hole 10 are one, and the first connection hole 60 and/or the second connection hole 10 are long holes.

In addition, the bracket 6 is not limited to the structural form of the present embodiment, and may include a plurality of inverted L-shaped bracket units arranged at intervals in the circumferential direction of the burner 1, for example.

As shown in fig. 1, a first plate 71 and a second plate 72 are transversely arranged in the premixing chamber 11, the first plate 71 and the second plate 72 are arranged at intervals up and down, the first plate 71 is located above the second plate 72, and the first plate 71 is located below the furnace plate 3. The first plate 71 is disposed near the upper portion of the premixing chamber 11, and a flow path 73 through which the mixed gas (gas and air mixed gas) flows out is formed between the outer peripheral edge of the first plate 71 and the inner wall of the burner 1, preferably, the axis of the first plate 71 coincides with the axis of the burner plate 3.

The outer peripheral edge of the second plate 72 contacts the inner wall of the burner 1, and the second plate 72 is provided with a gas passing hole 721 at a position adjacent to the center. In this embodiment, a circle of boss 111 is provided on the side wall of the premixing chamber 11, and when assembling, the second plate 72 is placed on the boss 111 of the premixing chamber 11, and then the first plate 71 and the second plate 72 are fixed by the connecting rod 74, so as to fix the first plate 71.

The arrangement of the first plate 71 and the second plate 72 makes the gas mixture in the premixing chamber 11 blocked by the second plate 72, and the gas mixture is gathered to the gas passing holes 721 and flows out, and then is scattered to the bottom of the furnace plate 3 along the periphery of the first plate 71, so that the flame is uniformly combusted, and the phenomenon of unilateral combustion is avoided.

The air blower 2 blows air into the premixing cavity directly to cause the air flow in the premixing cavity 11 to be disordered, so the burner further comprises a pipe body 8 with one open end, the open end of the pipe body 8 is communicated with the premixing cavity 11 of the burner 1, and an air inlet 81 communicated with the air outlet end of the air blower 2 is formed in the pipe body 8.

As shown in fig. 1 to 4, along the flow direction of the air flow, a first partition plate 82 and a second partition plate 83 are sequentially arranged in the pipe body 8 at intervals, a gas regulating chamber 84 is defined between the first partition plate 82, the second partition plate 83 and the inner wall of the pipe body 8, the gas nozzle 52 is located in the gas regulating chamber 84, one end of the gas channel 54 is located outside the pipe body 8 and connected with the gas source 51, the other end of the gas channel 54 extends into the gas regulating chamber 84 and is connected with the gas nozzle 52, a plurality of first through holes 821 for air to enter the gas regulating chamber 84 are formed in the first partition plate 82, namely, the first through holes 821 serve as air inlet holes, a second through hole 831 for the mixed gas to flow out is formed in the second partition plate 83, namely, the second through holes 831 serve as air outlet holes, the second partition plate 83 faces the open end of the pipe body 8, and the gas nozzle 52 faces the second through holes 831. Air enters the pipe body 8 for compression, uniformly flows out through the first through hole 821, then enters the air regulating chamber 84 for expansion and is mixed with fuel gas, and finally flows out through the second through hole 831 for compression, so that the fuel gas and the air are mixed better, and then enter the premixing cavity 11 for further mixing, and the mixing uniformity of the fuel gas and the air is improved.

The above-mentioned "the pressure of the gas flow needs to ensure that the gas combustion speed is greater than the flashback combustion speed", and since the pressure of the gas flow has a relationship with the volume, shape, combustion power, temperature, etc. of the burners, the volume, shape, combustion power, temperature, etc. of the burners are different, there is a difference between the gas pressures of the burners that make the gas combustion speed greater than the flashback combustion speed. In particular, where the volume, shape, burner plate, etc. of the burner are determined, this can be achieved by designing the airflow flow path. The first plate body and the second plate body are matched, and a first partition 82, a second partition 83 and a gas regulating chamber 84 are additionally arranged. The two are combined with each other skillfully, so that the flowing air flow is pressurized in the contraction section and depressurized in the expansion section, the flowing air direction is straightened, and the requirement that the pressure of the air flow ensures that the combustion speed of the fuel gas is higher than the tempering combustion speed can be met. By the design, manufacturing errors and assembly errors of the airflow flowing paths can be eliminated by adjusting the first plate body, the second plate body and/or the first baffle plate and the second baffle plate, so that the manufactured airflow flowing paths meet the pre-designed requirements.

That is, after the structure of the burner of the present embodiment is manufactured, the installation positions of the first plate 71 and the second plate 72 in the burner 1 and the installation positions of the first partition 82 and the second partition 83 in the tube 8 can be adjusted according to the manufactured structure of the burner, the combustion power, the combustion temperature, and other factors, so that the stroke of the expansion section or the contraction section is changed, and after multiple adjustment, the air flow stroke is adjusted until the pressure of the air flow reaches the requirement: the gas combustion speed can be ensured to be larger than the tempering combustion speed. The same type of burner can be manufactured according to the method.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present application may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity.

Claims

1. The utility model provides a combustor, includes furnace end (1), air-blower (2), gas subassembly and stove board (3), the inside premix chamber (11) that is formed with of furnace end (1), air-blower (2) are arranged in to the air-inlet in premix chamber (11), gas subassembly is arranged in to the air-inlet in premix chamber (11), stove board (3) set up in furnace end (1) and are located the upper portion in premix chamber (11), its characterized in that: the burner also comprises a regulator (4) which can regulate the air outlet of the blower (2) according to the gas flow of the gas assembly and adapt the gas flow and the air outlet;

the pressure of the mixed gas in the premixing cavity (11) at the furnace plate (3) needs to ensure that the gas combustion speed is higher than the tempering combustion speed;

a first plate body (71) positioned below the furnace plate (3) is transversely arranged in the premixing cavity (11), the first plate body (71) is arranged close to the upper part of the premixing cavity (11), and a flow channel (73) for flowing out of mixed gas is formed between the peripheral edge of the first plate body (71) and the inner wall of the furnace end (1);

a second plate body (72) positioned below the first plate body (71) is further arranged in the premixing cavity (11), the second plate body (72) is transversely arranged, the periphery edge of the second plate body is contacted with the inner wall of the burner (1), and a gas passing hole (721) is formed in the position, adjacent to the center, of the second plate body (72);

the burner further comprises a tube body (8) with one open end, the open end of the tube body (8) is communicated with a premixing cavity (11) of the burner (1), and an air inlet (81) communicated with the air outlet end of the blower (2) is formed in the tube body (8);

the gas assembly comprises a gas nozzle (52), wherein the gas chamber (84) is arranged at the open end of the pipe body (8) adjacent to the pipe body (8), and is provided with a gas inlet hole for air in the pipe body (8) to enter and a gas outlet hole for communicating the gas chamber (84) with the premixing cavity (11), and the gas nozzle (52) is positioned in the gas chamber (84);

along the flow direction of the air flow in the pipe body (8), a first partition plate (82) and a second partition plate (83) are sequentially arranged in the pipe body (8) at intervals, the second partition plate (83) faces the open end of the pipe body (8), a gas regulating chamber (84) is formed by enclosing between the first partition plate (82), the second partition plate (83) and the inner wall of the pipe body (8), a plurality of first through holes (821) are formed in the first partition plate (82) so as to form the gas inlet holes, and a second through hole (831) for flowing out of mixed gas is formed in the second partition plate (83) so as to form the gas outlet holes;

the gas combustion speed is ensured to be greater than the tempering combustion speed by adjusting the installation positions of the first plate body (71) and the second plate body (72) in the furnace end (1) and the installation positions of the first baffle plate (82) and the second baffle plate (83) in the pipe body (8).

2. The burner of claim 1, wherein: the gas assembly comprises a gas source (51), a gas nozzle (52) and a gas valve (53) which is arranged on a gas channel (54) between the gas source (51) and the gas nozzle (52) and is used for controlling the gas flow, and the gas nozzle (52) is communicated with the premixing cavity (11);

the regulator (4) comprises a sensor and a controller, wherein the sensor is connected with the input end of the controller, the output end of the controller is connected with the motor of the blower (2), the sensor is an angle sensor capable of detecting the opening angle of the gas valve (53) or a flow sensor capable of detecting the gas flow in the conveying pipeline, and the controller can control the voltage of the motor of the blower (2) and/or the working frequency of the motor according to the signals of the sensor.

3. The burner according to claim 1 or 2, wherein: the top of the furnace end (1) is also provided with a bracket (6) for placing a pot, the bracket (6) can move up and down relative to the furnace end (1), and the bracket (6) is fixed with the furnace end (1) through a connecting piece after moving in place.

4. The burner of claim 1, wherein: the axis of the first plate body (71) is coincident with the axis of the furnace plate (3).

5. The burner of claim 1, wherein: the second through hole (831) corresponds to the gas nozzle (52).