CN114353072A

CN114353072A - Combustor and water heater

Info

Publication number: CN114353072A
Application number: CN202011074017.3A
Authority: CN
Inventors: 李鑫
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-15

Abstract

The invention discloses a burner and a water heater, wherein the burner comprises: a housing formed with a combustion chamber, the housing having a first sidewall and a second sidewall, the first sidewall and the second sidewall being disposed opposite one another; a plurality of first nozzles disposed on the first sidewall; and the second nozzles are arranged on the second side wall, and the axes of the first nozzles and the axes of the second nozzles are staggered. According to the invention, the plurality of first nozzles and the plurality of second nozzles are respectively arranged on the first side wall and the second side wall which are opposite to each other of the combustion chamber, so that the plurality of nozzles are respectively dispersed and sprayed into gas from two sides for combustion, flames formed in the combustion chamber can be relatively dispersed, and the problem of overheating of the inner wall of the combustion chamber caused by overlarge air pressure when air flow is intensively sprayed out is solved; through making first nozzle and second nozzle setting of staggering each other, reduce the mutual offset of the air current of first nozzle and second nozzle, and then promote gaseous combustion efficiency.

Description

Combustor and water heater

Technical Field

The invention relates to the field of water heaters, in particular to a burner and a water heater.

Background

High temperature air combustion (high temperature air combustion) is called MILD and deep low oxygen dilution combustion, which is called soft combustion for short, and is a novel combustion mode, also called MILD combustion. When gas and air mix and inject into the combustion chamber at a high speed, because the gas mixture velocity of flow is high, the insufficient problem of burning appears easily. When gas is burnt at high temperature, the inner wall of the combustion chamber is easy to cause over-temperature, and the service life of the combustor is influenced.

Disclosure of Invention

The invention mainly aims to provide a combustor and a water heater, and aims to solve the problem that the high temperature of a side wall is caused by the fact that air flow in the existing combustor impacts the inner wall of the combustor.

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

a housing formed with a combustion chamber, the housing having a first sidewall and a second sidewall, the first sidewall and the second sidewall being disposed opposite one another;

a plurality of first nozzles disposed on the first sidewall; and

and the second nozzles are arranged on the second side wall, and the axes of the first nozzles and the axes of the second nozzles are staggered.

Optionally, an orthographic projection of the first nozzle on the second side wall is located in the middle of two adjacent second nozzles.

Optionally, the first nozzle and the second nozzle are arranged parallel to each other.

Optionally, the number of the first nozzles is not less than 12 and not more than 24, the distance between adjacent first nozzles is not less than 10mm and not more than 40mm, and the inner diameter of each first nozzle is not less than 3.6mm and not more than 7 mm;

the number of the second nozzles is not less than 12 and not more than 24, the distance between the second nozzles is not less than 10mm and not more than 40mm, and the inner diameter of the second nozzles is not less than 3.6mm and not more than 7 mm.

Optionally, the number of the first nozzles is 10, the distance between adjacent first nozzles is 18mm, and the inner diameter of each first nozzle is 4 mm; and/or

The number of the second nozzles is 10, the distance between every two adjacent second nozzles is 18mm, and the inner diameter of each second nozzle is 4 mm.

Optionally, the burner further comprises:

the air inlet cover is provided with an air inlet cavity and an air inlet pipe communicated with the air inlet cavity;

the air inlet cover is arranged on one side, back to the combustion chamber, of the first side wall, and one end, far away from the combustion chamber, of the first nozzle is communicated with the air inlet cavity; and/or

The air inlet cover is arranged on one side, back to the combustion chamber, of the second side wall, and one end, far away from the combustion chamber, of the second nozzle is communicated with the air inlet pipe.

Optionally, a spoiler is arranged in the air inlet cavity, the spoiler divides the air inlet cavity into a first cavity close to the air inlet pipe and a second cavity far away from the air inlet pipe, and an overflowing hole communicating the first cavity with the second cavity is formed in the spoiler;

when the air inlet cover is arranged on one side, back to the combustion chamber, of the first side wall, the first nozzle is communicated with the second chamber; when the air inlet cover is arranged on one side, back to the combustion chamber, of the second side wall, the second nozzle is communicated with the second chamber.

Optionally, the direction of the airflow channel formed by the air inlet pipe is parallel to the length direction of the spoiler, and the effective flow area of the flow hole close to one end of the air inlet pipe is larger than that of the flow hole far away from one end of the air inlet pipe.

Optionally, the effective flow area of the first chamber gradually increases from the air inlet pipe to the spoiler.

Optionally, the spoiler is of a wave-shaped structure along the length direction, and the overflowing holes are arranged on the ascending surface and/or the descending surface of the wave-shaped structure.

Optionally, the inlet cowl comprises:

a rear cover;

the front cover is arranged opposite to the rear cover, and a through hole is formed in the front cover; and

the side coaming is arranged between the rear cover and the front cover, the rear cover and the side coaming are encircled to form the air inlet cavity, and the air inlet pipe is connected with the side coaming or the rear cover; when the air inlet cover is arranged on one side, back to the combustion chamber, of the first side wall, the first nozzle is communicated with the air inlet cavity through the through hole; when the air inlet cover is arranged on one side, back to the combustion chamber, of the second side wall, the second nozzle is communicated with the air inlet cavity through the through hole.

Optionally, the burner further comprises a heat pipe disposed proximate to the first sidewall and/or the second sidewall.

Optionally, the heat conducting pipe is disposed on a side of the first sidewall and/or the second sidewall facing the combustion chamber.

Optionally, the housing further comprises:

the third side wall is provided with a first convex hull; and

the fourth lateral wall, the fourth lateral wall with the third lateral wall sets up relatively, first lateral wall, third lateral wall, second lateral wall and the fourth lateral wall encloses to close and forms the combustion chamber, be equipped with the second convex closure on the fourth lateral wall, first convex closure with be formed with well plenum chamber in the second convex closure, the heat pipe communicates respectively first convex closure with the second convex closure.

Optionally, the burner further comprises:

the preheater is used for preheating gas to a target temperature and then conveying the gas to the combustion chamber;

and gas and/or air are/is injected into the combustion chamber through the first nozzle and the second nozzle, so that high-temperature air combustion reaction is carried out in the combustion chamber.

The invention provides a water heater on the basis of the burner, and the water heater comprises the burner.

According to the technical scheme, the plurality of first nozzles and the plurality of second nozzles are respectively arranged on the first side wall and the second side wall, which are opposite to each other, of the combustion chamber, so that the plurality of nozzles are respectively dispersed and sprayed into gas from two sides for combustion, flames formed in the combustion chamber can be relatively dispersed, and the problem that the inner wall of the combustion chamber is overheated due to overlarge local air pressure when the gas flow is intensively sprayed out is solved; through making first nozzle and second nozzle setting of staggering each other, reduce the mutual offset of the air current of first nozzle and second nozzle, and then promote gaseous combustion efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a burner of the present invention;

FIG. 2 is a cloud of simulated velocity at the exit cross-section of a first nozzle;

FIG. 3 is a partial enlarged view of a first nozzle cross-sectional simulated velocity;

FIG. 4 is an exploded view of FIG. 1;

fig. 5 is a schematic structural diagram of a spoiler according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Combustion chamber	11	Air inlet cover
12	Air inlet pipe	13	Back cover
				14	Front cover	15	Side coaming
16	Spoiler	17	Overflowing hole
				20	First side wall	21	First nozzle
22	First side coaming	23	First air inlet pipe
				24	First rear cover	25	First spoiler
26	First front cover	27	Clamping groove
				30	Second side wall	31	Second nozzle
32	Second side coaming	33	Second air inlet pipe
				34	Second rear cover	35	Second spoiler
36	Second front cover	40	Heat conduction pipe
				50	Third side wall	51	First convex hull
60	The fourth side wall	61	Second convex hull

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a burner for a water heater, particularly a gas water heater using high temperature air for combustion and other related products and devices for household bathing and heating using high temperature hot water generated by gas combustion.

In one embodiment, the burner comprises: a housing formed with a combustion chamber 10, the housing having a first sidewall 20 and a second sidewall 30, the first sidewall 20 and the second sidewall 30 being disposed opposite to each other; a plurality of first nozzles 21 provided on the first sidewall 20; and a plurality of second nozzles 31 provided on the second sidewall 30, wherein axes of the first nozzles 21 and axes of the second nozzles 31 are offset from each other.

The housing has a hollow chamber inside, which is the combustion chamber 10. The first side wall 20 and the second side wall 30 are two opposite side walls of the housing, and the first nozzles 21 are arranged on the first side wall 20 at intervals, are communicated with the inner side and the outer side of the combustion chamber 10, and are used for injecting gas outside the combustion chamber 10 into the combustion chamber 10. The second nozzles 31 are disposed on the second sidewall 30 at intervals, and are communicated with the inner side and the outer side of the combustion chamber 10, so as to inject the gas outside the combustion chamber 10 into the combustion chamber 10.

The combustion chamber 10 can be used for forming a space for gas combustion, the first nozzle 21 and the second nozzle 31 can spray gas into the combustion chamber 10 at a high speed, the first nozzle 21 and the second nozzle 31 can spray gas or mixed gas of gas and air, and the combustion chamber 10 is provided with air for gas combustion; the combustion chamber 10 may have a gas therein, and the first and

second nozzles

21 and 31 may inject air or a mixture of air and the gas into the combustion chamber 10. The burner is used for a water heater, and high-temperature flue gas formed by combustion in the combustion chamber 10 exchanges heat with a heat exchange pipe of the water heater to heat water in the heat conduction pipe 40 to form hot water and output the hot water.

Because the first side wall 20 and the second side wall 30 are arranged oppositely, the air flows formed by the first nozzle 21 and the second nozzle 31 may interfere with each other, in this embodiment, the axial direction of the first nozzle 21 and the axial direction of the second nozzle 31 are arranged in a staggered manner, so that the air flow formed by the first nozzle 21 and the air flow formed by the second nozzle 31 do not directly collide with each other, and the problem of insufficient combustion caused by the mutual collision of the air flows is avoided.

When the first nozzle 21 and the second nozzle 31 spray gas to form flame, the gas flow sprayed by the first nozzle 21 and the second nozzle 31 can be quickly combusted in the combustion chamber 10, so that a high-temperature state is quickly formed in the combustion chamber 10, and the combustion speed can be increased. The airflow is rapidly combusted as it enters the combustion chamber 10, and the forces that the airflow can exert on the first and

second sidewalls

20, 30 are relatively small, thereby reducing the problem of airflow rushing out of the chamber.

Since the air flows injected from the first nozzle 21 and the second nozzle 31 are staggered from each other, the first nozzle 21 injects the air flow toward the second sidewall 30, and the second nozzle 31 injects the air flow toward the first sidewall 20, the combustion efficiency of the portion near the outer flame is relatively higher when the combustible gas is combusted, and therefore, the combustion efficiency of the combustible gas near one end of the nozzle is lower than that of the combustible gas far from the nozzle. In this embodiment, the heat of the outer flame of the flame formed by the airflow ejected from the first nozzle 21 can act on the second sidewall 30, so that the combustible gas near the second sidewall 30 in the airflow ejected from the second nozzle 31 can be combusted, and the combustible gas near the second nozzle 31 is sufficiently combusted, so as to improve the uniformity of combustion of the combustible gas, and simultaneously, the uniformity of the temperature in the combustion chamber 10 is improved, so that the high-heat gas with uniform temperature can be delivered to the water heater.

In this embodiment, a rectangular parallelepiped combustion chamber 10 is formed in the combustor, and the housing further includes a third sidewall 50; and a fourth sidewall 60, wherein the fourth sidewall 60 is disposed opposite to the third sidewall 50, and the first sidewall 20, the third sidewall 50, the second sidewall 30 and the fourth sidewall 60 enclose the combustion chamber 10.

In this embodiment, optionally, an orthographic projection of the first nozzle 21 on the second sidewall 30 is located in a middle of two adjacent second nozzles 31, so that airflow formed by the first nozzle 21 and the second nozzle 31 does not form turbulent flow, and the combustible gas is combusted more fully.

The first nozzle 21 and the second nozzle 31 inject the gas relatively, and the plurality of first nozzles 21 dispersedly inject the gas flow into the combustion chamber 10. Therefore, the flow velocity of the air flow entering the combustion chamber 10 is relatively slow compared with the air flow velocity of a single nozzle, so that the opposite impact of the air flow of the first nozzle 21 on the second side wall 30 can be reduced, and the problem of local overheating of the second nozzle 31 caused by over-concentrated flame combustion formed by air flow injection is avoided. The first nozzles 21 and the second nozzles 31 may be arranged in a staggered manner, so that the air flows formed by the first nozzles 21 and the second nozzles 31 are staggered with each other.

Optionally, in this embodiment, the first nozzle 21 and the second nozzle 31 are arranged in parallel to each other, so that the airflows sprayed by the first nozzle 21 and the second nozzle 31 move in opposite directions, and because the first nozzle 21 and the second nozzle 31 are arranged in a staggered manner, the airflows can be staggered with each other, and when a flame is formed, the flames formed by the first nozzle 21 and the second nozzle 31 do not interfere with each other, so that the combustion efficiency of the combustible gas can be improved.

When the gas flow injected from the first nozzle 21 and the gas flow injected from the second nozzle 31 are combusted in the combustion chamber 10, the gas flows can sufficiently interact with the air or the combustible gas in the combustion chamber 10, so that the combustion efficiency of the combustible gas is higher.

Because the first nozzle 21 and the second nozzle 31 can uniformly disperse and input gas into the combustion chamber 10, the combustible gas and air in the combustion chamber 10 are more sufficiently mixed, the combustion efficiency is further improved, and nitrogen oxides and carbon monoxide generated by the combustible gas are reduced. When the total amount of the input gas is equal, the plurality of first nozzles and the plurality of second nozzles dispersedly inject the gas flow into the combustion chamber, compared with the mode of a single nozzle, the impact force generated by the single nozzle on the inner wall of the combustion chamber is reduced, and further the damage to a combustor device is reduced.

In one embodiment of the present invention, the burner further comprises: a preheater for preheating the gas to a target temperature and then delivering the gas to the combustion chamber 10; wherein, gas and/or air is injected into the combustion chamber 10 through the first nozzle 21 and the second nozzle 31, so that a high-temperature air combustion reaction is performed in the combustion chamber 10.

High temperature air combustion (high temperature air combustion) is called MILD and deep low oxygen dilution combustion, and is called a novel combustion mode for short, namely MILD combustion. The main characteristics of the combustion are as follows: the chemical reaction mainly takes place in the environment of high temperature and low oxygen (temperature is mainly 600-1200 ℃, oxygen concentration is 3% -10%), the temperature of the reactant is higher than the self-ignition temperature, the maximum temperature rise in the combustion process is lower than the self-ignition temperature, and the oxygen volume fraction is diluted by the combustion product to an extremely low concentration, usually 3% -10%. Compared with conventional combustion, in the combustion state, the pyrolysis of fuel is inhibited, the flame thickness is thickened, and the flame front surface disappears, so that the temperature of the whole hearth is very uniform during the combustion, and the emission of pollutants NOx and CO is greatly reduced.

The preheater or the first nozzle 21 and the second nozzle 31 input combustible gas into the combustion chamber 10, taking the example that the preheater injects air into the combustion chamber 10 and the first nozzle 21 and the second nozzle 31 inject mixed gas of gas and air into the combustion chamber 10, when the first nozzle 21 and the second nozzle 31 inject gas flow into the combustion chamber 10 at high speed, the gas flow injected at high speed exchanges heat with preset gas in the combustion chamber 10, so as to realize rapid combustion. Under the effect of first nozzle 21 and second nozzle 31, the air current that first nozzle 21 and second nozzle 31 jetted gets into fast in the combustion chamber 10, can with the preheater is carried to the air current in the combustion chamber 10 forms entrainment effect, and the air current that high-speed injection got into in the combustion chamber 10 can produce the impact to the preheated air current in the combustion chamber 10, makes the air current disturbed fast, and preheated air current can carry out fast mixing and burning with the gas, makes the combustion rate of gas faster, and combustion efficiency is higher.

In one embodiment of the present invention, the number of the first nozzles 21 is not less than 12 and not more than 24, the interval between the adjacent first nozzles 21 is not less than 10mm and not more than 40mm, the inner diameter of the first nozzles 21 is not less than 3.6mm and not more than 7 mm; the number of the second nozzles 31 is not less than 12 and not more than 24, the distance between the adjacent second nozzles 31 is not less than 10mm and not more than 40mm, and the inner diameter of the second nozzles 31 is not less than 3.6mm and not more than 7 mm.

When the number of the first nozzles 21 is large, the inner diameter of the first nozzle 21 is correspondingly increased so that the flow rate of the airflow formed by the first nozzle 21 is reduced, or the distance between the adjacent first nozzles 21 is increased so that the airflow entering the combustion chamber 10 can be sufficiently combusted. The first nozzle 21 and the second nozzle 31 are adapted.

In an alternative embodiment of the present invention, the number of the first nozzles 21 is 10, the distance between adjacent first nozzles 21 is 18mm, and the inner diameter of the first nozzles 21 is 4 mm; the number of the second nozzles 31 is 10, the distance between adjacent second nozzles 31 is 18mm, and the inner diameter of each second nozzle 31 is 4 mm.

Referring to fig. 2 and 3, in the embodiment, the sectional velocity uniformity of the first nozzle 21 and the second nozzle 31 is good, and the experimental statistical uniformity coefficient is 0.935. The outlet cross-section of the first nozzle 21 and the second nozzle 31 has a good center uniformity and a small boundary velocity due to the boundary layer effect only. Through adopting above-mentioned setting, can promote the gaseous homogeneity in the combustion chamber 10, make the gaseous burning more even, and then reduce harmful gas's emission. The first nozzle 21 and the second nozzle 31 have less influence on the inner wall of the combustion chamber 10, which helps to reduce the problem of gas rushing to the wall and can avoid the problem of over-temperature of the inner wall of the combustion chamber 10.

Referring to fig. 4, in an embodiment of the present invention, the burner further includes an intake cover 11, where the intake cover 11 is formed with an intake cavity and an intake pipe 12 communicating with the intake cavity; the air inlet cover 11 is arranged on one side of the first side wall 20, which faces away from the combustion chamber 10, and one end of the first nozzle 21, which is far away from the combustion chamber 10, is communicated with the air inlet cavity; and/or the air inlet cover 11 is arranged on one side of the second side wall 30, which faces away from the combustion chamber 10, and one end of the second nozzle 31, which is far away from the combustion chamber 10, is communicated with the air inlet pipe 12.

The intake pipe 12 be used for to the gaseous mist of the intracavity input combustible gas admits air, the cover 11 that admits air forms the air feed and flows into the cavity of first nozzle 21 and/or second nozzle 31, the air current certainly intake pipe 12 gets into during the intracavity of admitting air, the air current can mix once more in the intracavity of admitting air, makes gas and air in the gaseous mist can the intensive mixing, works as the air current certainly first nozzle 21 and/or second nozzle 31 sprays and gets into when in the combustion chamber 10, the burning can be more abundant. Gas through a plurality of first nozzles and/or a plurality of second nozzle is more even, when spraying in the combustion chamber and forming flame, also relatively more even to the produced heat of the inner wall of combustion chamber, and then can avoid first lateral wall and/or second lateral wall because be heated the deformation that uneven and lead to.

Optionally in this embodiment, the intake hood 11 includes: a rear cover 13; the front cover 14 is arranged opposite to the rear cover 13, and a through hole is formed in the front cover 14; the side coaming 15 is arranged between the rear cover 13 and the front cover 14, the rear cover 13 and the side coaming 15 are encircled to form the air inlet cavity, and the air inlet pipe 12 is connected with the side coaming 15 or the rear cover 13; when the air inlet cover 11 is arranged on one side of the first side wall 20, which faces away from the combustion chamber 10, the first nozzle 21 is communicated with the air inlet cavity through the through hole; when the intake cover 11 is disposed on a side of the second sidewall 30 facing away from the combustion chamber 10, the second nozzle 31 is communicated with the intake cavity through the through hole.

The side coamings 15 form the whole annular outline of the air inlet cavity, and the front cover 14 and the rear cover 13 respectively cover two ends of the side coamings 15 so as to form the air inlet cavity in an enclosing manner.

When the air inlet cover 11 is used for supplying air to the first nozzle 21, the air inlet cover 11 is arranged on one side of the first side wall 20, which faces away from the combustion chamber 10, the front cover 14 is attached to the first side wall 20, and the first nozzle 21 is communicated with the through hole in the front cover 14.

When the air inlet cover 11 is used for supplying air to the second nozzle 31, the air inlet cover 11 is arranged on one side, facing away from the combustion chamber 10, of the second side wall 30, the front cover 14 is attached to the second side wall 30, and the second nozzle 31 is communicated with the through hole in the front cover 14.

The intake pipe 12 may be disposed at an end of the intake hood 11 away from the first nozzle 21 and the second nozzle 31 to have a long flow path after the airflow enters the intake hood 11, so that the airflow can be sufficiently mixed in the intake hood 11.

In this embodiment, two air inlet covers 11 are disposed on the burner, and the two air inlet covers 11 are respectively used for supplying air to the first nozzle 21 and the second nozzle 31, wherein the air inlet cover 11 disposed on the side of the first side wall 20 facing away from the combustion chamber 10 is a first air inlet cover, the first nozzle 21 is communicated with the first air inlet cover, and a first air inlet pipe 23 is disposed on the first air inlet cover; the air inlet cover 11 arranged on the side of the second side wall 30 facing away from the combustion chamber 10 is a second air inlet cover, the second nozzle 31 is communicated with the second air inlet cover, and a second air inlet pipe 33 is arranged on the second air inlet cover.

The first air inlet hood comprises a first rear cover 24, a first side enclosing plate 22 and a first front cover 26, the first rear cover 24, the first side enclosing plate 22 and the first front cover 26 enclose to form a first air inlet cavity, the first front cover 26 is attached to one side, back to the combustion chamber 10, of the first side wall 20, and the first nozzle 21 is communicated with a through hole in the first front cover 26.

The second air inlet hood comprises a second rear cover 34, a second side enclosing plate 32 and a second front cover 36, the second rear cover 34, the second side enclosing plate 32 and the second front cover 36 enclose to form a second air inlet cavity, the second front cover 36 is attached to one side, back to the combustion chamber 10, of the second side wall 30, and the second nozzle 31 is communicated with a through hole in the second front cover 36. The first and second inlet hoods may be contoured and dimensioned to conform to initial parameters of the airflow delivered to the first and

second nozzles

21, 31.

Referring to fig. 4 and 5, in an embodiment of the present invention, a spoiler 16 is disposed in the air intake cavity, the spoiler 16 divides the air intake cavity into a first chamber close to the air intake pipe 12 and a second chamber far away from the air intake pipe 12, and an overflowing hole 17 communicating the first chamber and the second chamber is disposed on the spoiler 16; when the air inlet cover 11 is arranged on the side of the first side wall 20, which faces away from the combustion chamber 10, the first nozzle 21 is communicated with the second chamber; when the intake hood 11 is disposed on a side of the second sidewall 30 facing away from the combustion chamber 10, the second nozzle 31 communicates with the second chamber. The air flow enters the first chamber from the intake pipe 12, is disturbed by the spoiler 16, enters the second chamber through the through-holes 17, and is then injected into the combustion chamber 10 through the first nozzle 21 and/or the second nozzle 31.

The overflowing hole 17 is a through hole formed in the spoiler 16, and the overflowing hole 17 is formed along the longitudinal direction of the spoiler 16. The air inlet chamber is divided by the spoiler 16 to form two separate chambers into which air can only enter through the flow apertures 17 in the spoiler 16. The flow direction of the air flow is changed under the action of the spoiler 16, so that the gas and the air in the air flow can be fully mixed, and further, the mixed air flow conveyed to the first nozzle 21 and/or the second nozzle 31 can be more uniform, so as to improve the combustion efficiency of the combustible gas.

In order to improve the mixing efficiency of the fuel gas, in this embodiment, optionally, the direction of the airflow channel formed by the air inlet pipe 12 is parallel to the length direction of the spoiler 16, and the effective flow area of the flow through hole 17 near one end of the air inlet pipe 12 is larger than the effective flow area of the flow through hole 17 far away from one end of the air inlet pipe 12.

The air flow enters the first chamber from the air inlet pipe 12, and the air flow rate of the end of the first chamber far away from the air inlet pipe 12 is relatively large because the direction of the air flow channel formed by the air inlet pipe 12 is parallel to the length direction of the spoiler 16. When the effective flow area of the overflowing hole 17 close to one end of the air inlet pipe 12 is increased, the side airflow flow can be increased, so that the air pressure of the first nozzle 21 and/or the second nozzle 31 at different positions is prevented from being different when the airflow is input into the second chamber from the overflowing hole 17 at the side far away from the air inlet pipe 12. When the effective flow area corresponding to the overflowing holes is changed, the uniformity of the airflow can be improved.

When the airflow channel direction of the air inlet pipe 12 is parallel to the length direction of the spoiler 16, the air inlet pipe 12 may be disposed near the side of the air inlet cover 11, so as to save the space beside the burner and facilitate the internal structure layout of the water heater.

The effective flow area refers to the area of a cross section of the overflowing hole 17 perpendicular to the flow direction of the airflow, and the larger the effective flow area is, the larger the area of the cross section of the overflowing hole 17 perpendicular to the flow direction of the airflow is. The overflowing hole 17 can adopt a round hole, a square hole or a porous combination.

Optionally, the spoiler 16 has a wave-like structure along the length direction, and the overflowing holes 17 are formed on the rising surface and/or the falling surface of the wave-like structure. The spoiler 16 has an ascending surface and a descending surface, so that when the air flows to the spoiler 16, the air can be turned under the action of the ascending surface and/or the descending surface of the spoiler 16, and further, the gas and the air in the air can be more fully mixed, which is beneficial to improving the uniformity of the gas.

In an embodiment, the effective flow area of the first chamber is gradually increased from the air inlet pipe 12 to the spoiler 16, the first chamber is arranged in a gradually expanding manner so that the air flow can be gradually dispersed after entering the first chamber, and the first chamber is close to one end of the spoiler 16, so that a larger mixing space can be formed, and the air flow can have higher uniformity in the first chamber.

When the air flow flows to the spoiler 16, the air flow can be dispersed in the first chamber and further input into the second chamber through the overflowing hole 17, so as to avoid uneven air pressure at different parts of the spoiler 16.

Because the air inlet cavity is divided into two parts by the spoiler 16, when the first cavity is arranged in a gradually expanding manner, one side of the first cavity of the air inlet cover 11 can form a V-shaped structure as shown in fig. 4, so that the layout of the air inlet pipe 12 can be facilitated, and the air inlet pipe 12 can be arranged on the side with the smallest effective flow area of the first cavity, so that a space for installing the air inlet pipe 12 is formed outside the air inlet cover 11, and the space utilization rate of the combustor is further improved.

In this embodiment, a first spoiler 25 is disposed in the first air inlet chamber, and a second spoiler 35 is disposed in the second air inlet chamber to improve uniformity of the gas delivered to the first nozzle and the second nozzle 31.

In one embodiment of the invention, the burner further comprises a heat pipe 40, the heat pipe 40 being arranged close to the first sidewall 20 and/or the second sidewall 30. The heat conductive pipe 40 is used for inputting cold water, and the inputted cold water exchanges heat with the first sidewall 20 and/or the second sidewall 30 to reduce the temperature of the first sidewall 20 and the second sidewall 30.

Since the first nozzle 21 and the second nozzle 31 are disposed on the side wall of the housing, the temperature of the first nozzle 21 and the second nozzle 31 can be reduced by reducing the temperature of the first side wall 20 and the second side wall 30, which further helps to reduce the flow rate of the air flow ejected from the first nozzle 21 and the second nozzle 31, and helps to improve the combustion efficiency.

The heat pipe 40 may be disposed inside the combustion chamber 10 or outside the combustion chamber 10, and in order to improve heat exchange efficiency, in this embodiment, the heat pipe 40 is disposed on a side of the first sidewall 20 and/or the second sidewall 30 facing the combustion chamber 10. When the burner is manufactured, a metal heat conducting member may be disposed on the heat conducting pipe 40, and the metal heat conducting member is connected to the first nozzle 21 and/or the second nozzle 31, so as to realize rapid heat conduction. Because the heat pipe can take away part of heat of the combustion chamber, in the embodiment, the output end of the heat pipe can be communicated with the heat exchange pipe of the water heater, so that the heat can be secondarily utilized.

In order to facilitate the fixing of the heat conducting pipes 40, a locking groove 27 may be disposed on the first sidewall 20 or the second sidewall 30, and the heat conducting pipes 40 are locked in the locking groove 27 to fix the heat conducting pipes 40, and at the same time, the heat exchanging area between the heat conducting pipes 40 and the first sidewall 20 or the second sidewall 30 may be increased.

Referring to fig. 1 and 4, in an embodiment of the present invention, the housing further includes: a third side wall 50, wherein a first convex hull 51 is arranged on the third side wall 50; and a fourth sidewall 60, where the fourth sidewall 60 is opposite to the third sidewall 50, the first sidewall 20, the third sidewall 50, the second sidewall 30, and the fourth sidewall 60 enclose the combustion chamber 10, a second convex hull 61 is disposed on the fourth sidewall 60, and the heat pipe 40 is respectively communicated with the first convex hull 51 and the second convex hull 61.

The first convex hull 51 forms a hollow chamber on the third sidewall 50, the second convex hull 61 forms a hollow chamber on the fourth sidewall 60, and the water of the heat conducting pipe 40 can be output after passing through the first convex hull 51 and the second convex hull 61, so as to cool the third sidewall 50 and the fourth sidewall 60.

The invention also proposes an embodiment of a water heater comprising a burner as described in any one of the embodiments above.

Claims

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

a plurality of first nozzles disposed on the first sidewall; and

2. The burner of claim 1, wherein an orthographic projection of said first nozzle on said second sidewall is located in a middle of two adjacent said second nozzles.

3. The burner of claim 1, wherein the first nozzle and the second nozzle are arranged parallel to each other.

4. The combustor according to claim 1, wherein the number of the first nozzles is not less than 12 and not more than 24, a spacing between adjacent first nozzles is not less than 10mm and not more than 40mm, and an inner diameter of the first nozzles is not less than 3.6mm and not more than 7 mm;

5. The burner of claim 4, wherein the number of the first nozzles is 10, the interval between the adjacent first nozzles is 18mm, and the inner diameter of the first nozzles is 4 mm; and/or

6. The burner of claim 1, further comprising:

7. The burner of claim 6, wherein a spoiler is arranged in the air inlet cavity, the spoiler divides the air inlet cavity into a first chamber close to the air inlet pipe and a second chamber far away from the air inlet pipe, and the spoiler is provided with an overflowing hole for communicating the first chamber and the second chamber;

8. The burner of claim 7, wherein the direction of the air flow passage formed by the intake pipe is parallel to the length direction of the spoiler, and the effective flow area of the flow holes near the end of the intake pipe is larger than the effective flow area of the flow holes at the end of the intake pipe remote from the intake pipe.

9. The burner of claim 7, wherein the effective flow area of the first chamber increases from the intake tube toward the spoiler.

10. The burner of claim 7, wherein the spoiler has a wave-like structure in a length direction, and the overflowing hole is provided on a rising surface and/or a falling surface of the wave-like structure.

11. The burner of claim 6, wherein the inlet cowl comprises:

a rear cover;

12. The burner of claim 1, further comprising a heat pipe disposed proximate to the first sidewall and/or the second sidewall.

13. The burner of claim 12, wherein the heat pipe is disposed on a side of the first sidewall and/or the second sidewall facing the combustion chamber.

14. The burner of claim 12, wherein the housing further comprises:

the third side wall is provided with a first convex hull; and

15. The burner of any of claims 1 to 14, further comprising:

16. A water heater, characterized in that it comprises a burner as claimed in any one of claims 1 to 15.