CN109595551B

CN109595551B - Thick-thin burner

Info

Publication number: CN109595551B
Application number: CN201811401114.1A
Authority: CN
Inventors: 徐立; 张阳阳; 郭永花; 靳继祖
Original assignee: Beijing Kd Navien Thermal Equipment Co ltd
Current assignee: Beijing Kd Navien Thermal Equipment Co ltd
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2020-07-14
Anticipated expiration: 2038-11-22
Also published as: CN109595551A

Abstract

The invention relates to a thick-thin burner which comprises two outer shells, wherein an inner shell is connected between the two outer shells, a first injection channel for introducing gas and air is fixedly arranged on the inner shell, a first mixing cavity communicated with the first injection channel is fixedly arranged in the inner shell, a main fire hole is formed in the position, corresponding to the upper end of the first mixing cavity, of the shell, a second injection channel for introducing air is fixedly arranged in the inner shell, a second mixing cavity is formed between the inner shell and the outer shells, air outlet holes capable of being communicated with the second mixing cavity are respectively formed in two sides of the upper end of the first injection channel, and a fire distributing hole communicated with the second mixing cavity is formed in the upper end of the second mixing cavity. The invention has the advantages of convenient debugging and simple use.

Description

Thick-thin burner

Technical Field

The invention relates to the technical field of gas combustion of water heaters, in particular to a thick and thin combustor.

Background

Due to the increasingly worsened ecological environment, the health of human beings is more and more seriously harmed. People pay more and more attention to air pollution. All industries respond to the national call to save energy and reduce emission. Due to the rapid development of town gas, gas water heaters are more and more popular with people because of their convenience and rapidness. In the existing gas water heater, harmful gas is generated due to inevitable combustion of gas, and particularly, the content of nitrogen oxides in flue gas is high, so that the environmental pollution is serious.

The prior Chinese patent with the reference application publication number of CN107314372 discloses a burner of a gas water heater, which comprises an outer shell and an inner shell, wherein the inner shell is provided with a first injection passage, a second injection passage and a first mixed gas cavity. The shell is equipped with accommodation space, and the inner shell is installed in accommodation space, forms second gas mixture cavity between inner shell and the shell, and the one end that first draws the passageway is equipped with first air inlet, and first draws passageway and first gas mixture cavity intercommunication, and the one end that the passageway was drawn to the second is equipped with the second air inlet, and the passageway is drawn to the second and second gas mixture cavity intercommunication. The top of inner shell is equipped with the first flame mouth with first gas mixture chamber intercommunication, and the top of shell is equipped with the second flame mouth with second gas mixture chamber intercommunication, and the second flame mouth is located the both sides of first flame mouth. The burner of the gas water heater reduces the discharge amount of nitrogen oxides on the premise of not reducing the utilization rate of gas, so that the burner of the gas water heater is beneficial to environmental protection.

However, the above prior art solutions have the following drawbacks: in the use process of the burner of the gas water heater, the mixed gas with different gas and air concentrations must be respectively introduced into the first injection channel and the second injection channel, so that two different mixed gas conveying pipes need to be connected, the operation is troublesome, and the burner is inconvenient to debug when needed.

Disclosure of Invention

The invention aims to provide a thick and thin burner which is convenient to debug and simple to use.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a dense-dilute combustor, includes two shells, is connected with the inner shell between two shells, the inner shell sets firmly the first passageway of penetrating that draws that is used for letting in gas and air, sets firmly the first hybrid chamber with first penetrating passageway intercommunication in the inner shell, and the main fire hole has been seted up to the position that the casing corresponds first hybrid chamber upper end, and the inner shell still sets firmly the second that is used for letting in the air and draws the passageway, forms the second hybrid chamber between inner shell and the shell, and the venthole that can communicate with the second hybrid chamber is still seted up respectively to the upper end both sides of first penetrating passageway, and the upper end of second hybrid chamber is provided with the branch fire hole of second hybrid chamber intercommunication.

Through adopting above-mentioned technical scheme, in operation, only need inject the mist that lets in gas and air in the passageway to first drawing, then draw the passageway through the second and let in the air, after gas and air admission first draw the passageway, partly mist gets into first mixing chamber and jets through main fire hole, form thick flame gas, the mist of another part gets into the second mixing chamber through the venthole of first drawing the passageway, and mix with the air that draws the passageway to get into from the second, thereby make the air proportion of second mixing intracavity be greater than the air proportion of first mixing intracavity, and form light flame gas from the branch fire hole blowout of fin board, high durability and convenient use, air gas proportion regulation is more nimble, the nitrogen oxide emission is lower, it is more convenient to debug.

The invention is further configured to: and a second finned plate is arranged at the upper end of the second mixing cavity and forms a fire distributing hole communicated with the second mixing cavity.

Through adopting above-mentioned technical scheme, can spout the even follow second mixing chamber of the mist of second mixing chamber through the second fin that sets up, simple structure.

The invention is further configured to: the upper end height of the main fire hole is higher than that of the fire dividing holes.

Through adopting above-mentioned technical scheme, highly being higher than the height of dividing the fire hole through setting up the main fire hole, can making dense flame district and light flame district be the difference in height distribution design, can make flame gather together effectively, make flame more stable.

The invention is further configured to: the upper end of the main fire hole is 1-3mm higher than the upper end of the fire dividing hole.

The invention is further configured to: the upper end of first hybrid chamber is provided with the first finned plate that can communicate main fire hole and first hybrid chamber.

Through adopting above-mentioned technical scheme, can carry out even distribution to each main fire hole with the mist in the first mixing chamber through the first fin that sets up, make mist from the even blowout in main fire hole.

The invention is further configured to: the first injection passage is positioned above the second injection passage, and the second injection passage and the air inlet of the first injection passage are positioned on the same side.

Through adopting above-mentioned technical scheme, be convenient for gas and air get into respectively from the same one side of inner shell and draw and penetrate passageway and second and draw and penetrate the passageway, make the compact structure of inner shell, save space.

The invention is further configured to: the first injection channel comprises an air suction pipe, a mixing pipe and a diffuser pipe which are sequentially connected, the joint of the air mixing pipe and the diffuser pipe is U-shaped, and the rotation angle of the air mixing pipe and the diffuser pipe is 18-23 degrees.

The invention is further configured to: the inlet caliber of the air suction pipe is larger than the outlet caliber of the air suction pipe, and the inlet caliber of the diffuser pipe is smaller than the outlet caliber of the diffuser pipe.

Through adopting above-mentioned technical scheme, when the gas passes through the breathing pipe, the velocity of flow increase of gas promotes effectively and draws the effect of drawing penetrating the air for near the air of air inlet is drawn into more in the first passageway of drawing penetrates. When the mixed gas passes through the diffuser pipe, partial dynamic pressure of the mixed gas is changed into static pressure so as to improve the pressure of the mixed gas, and meanwhile, the mixed gas is beneficial to further uniformly mixing the gas and the air, and the flowing speed of the mixed gas is effectively reduced.

In conclusion, the beneficial technical effects of the invention are as follows:

1. when the novel thin-flame gas mixer works, only mixed gas of gas and air needs to be introduced into the first injection channel, then air is introduced through the second injection channel, after the gas and the air enter the first injection channel, a part of the mixed gas enters the first mixing cavity and is injected through the main fire hole to form thick flame gas, the other part of the mixed gas enters the second mixing cavity through the air outlet hole of the first injection channel and is mixed with the air entering from the second injection channel, so that the air proportion in the second mixing cavity is larger than that in the first mixing cavity, and the mixed gas is injected from the fire dividing holes of the fin plate to form thin flame gas, the novel thin-flame gas mixer is convenient to use, the air-gas proportion is more flexibly adjusted, the emission of nitrogen oxides is lower, and the debugging is more convenient;

2. the second fin plate can uniformly eject the mixed gas in the second mixing cavity from the second mixing cavity, so that the structure is simple;

3. through being provided with the height that main fire hole height is higher than branch fire hole, can make dense flame district and light flame district be the difference in height distribution design, can make flame gather together effectively, make flame more stable.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second mixing chamber according to a first embodiment of the present invention.

Fig. 3 is a schematic structural view of a first fin according to a second embodiment of the present invention.

In the figure, 1, a housing; 2. an inner shell; 21. a first injection passage; 211. an air intake duct; 212. a gas mixing pipe; 213. a diffuser pipe; 214. an air outlet; 22. a first mixing chamber; 221. a main fire hole; 222. a first fin plate; 23. a second injection passage; 231. an airway; 24. a second mixing chamber; 241. a second fin plate; 242. a fire distributing hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows: referring to fig. 1, a rich-lean burner disclosed by the present invention includes two outer shells 1 and an inner shell 2 fixedly connected to one side of the two outer shells 1, which is close to each other.

The lower side of the inner shell 2 is provided with a first injection passage 21, the first injection passage 21 is used for introducing mixed gas of fuel gas and air, the first injection passage 21 comprises an air suction pipe 211, an air mixing pipe 212 and a diffuser pipe 213 which are sequentially communicated, an inlet of the air suction pipe 211 is formed in one side edge of the inner shell 2, an inlet caliber of the air suction pipe 211 is larger than an outlet caliber of the air suction pipe 211, the air mixing pipe 212 is connected to one end of an outlet of the air suction pipe 211 and is horizontally arranged, the length of the air mixing pipe 212 is longer than that of the diffuser pipe 213, and the length of the diffuser pipe 213 is larger than that of the air suction pipe, so that the lengths of the mixing pipe, the diffuser pipe 213. The connecting part of the gas mixing pipe 212 and the diffuser pipe 213 is U-like, and the rotation angle of the gas mixing pipe 212 and the diffuser pipe 213 is 18-23 degrees. The inlet diameter of the diffuser pipe 213 is smaller than the outlet diameter of the diffuser pipe 213, and the outlet side of the diffuser pipe 213 is flat. When the gas passes through the breathing pipe 211, the velocity of flow of gas increases, promotes effectively and draws the effect of drawing penetrating the air for near the air inlet is drawn into more in the first passageway 21 of drawing. When the mixed gas passes through the diffuser pipe 213, partial dynamic pressure of the mixed gas is changed into static pressure to improve the pressure of the mixed gas, and meanwhile, the mixed gas is beneficial to further uniformly mixing the gas and the air, and the flowing speed of the mixed gas is effectively reduced. In addition, the longest length of the gas mixing pipe 212 is beneficial to fully mixing the gas and the air before entering the diffuser pipe 213, so that the velocity difference, the concentration field and the temperature field in the mixed gas are uniformly distributed.

The inner shell 2 is fixedly provided with a first mixing cavity 22 corresponding to the position above the first injection passage 21, the length direction of the first mixing cavity 22 is the same as that of the gas mixing pipe 212, the upper end of the diffuser pipe 213 is communicated with the first mixing cavity 22, the upper end of the inner shell 2 corresponding to the upper side of the first mixing cavity 22 is provided with main fire holes 221, and the main fire holes 221 are uniformly arranged along the length direction of the first mixing cavity 22. During operation, the mixed gas of gas and air is introduced from the first injection passage 21, then the mixed gas enters the first mixing chamber 22 from the first injection passage 21, and finally the mixed gas is ejected through the main fire hole 221 above the first mixing chamber 22 to form the dense flame gas.

The inner shell 2 is provided with a second injection channel 23 horizontally arranged corresponding to the position below the first injection channel 21, the second injection channel 23 is used for introducing air, one side of the inner shell 2 close to the outer shell 1 forms a second mixing cavity 24, the air inlet of the second injection channel 23 is positioned at the same side as the air inlet of the first injection channel 21, the upper side of the second injection channel 23 is further provided with an air passage 231 communicated with the second mixing cavity 24, and the two sides above the diffuser pipe 213 of the first injection channel 21 are provided with air outlet holes 214 communicated with the second mixing cavity 24. The second fin 241 is fixedly connected above the second mixing chamber 24, the upper end of the second fin 241 forms a fire distribution hole 242 which can facilitate the mixed gas in the second mixing chamber 24 to be sprayed, and the upper end of the fire distribution hole 242 is 1-3mm higher than the upper end of the fire distribution hole 242. During operation, air is introduced into the second injection passage 23, the air enters the second mixing cavity 24 through the air passage 231 of the second injection passage 23, meanwhile, a part of the air and the fuel gas entering from the first injection passage 21 enter the second mixing cavity 24 through the air outlet 214 of the diffuser pipe 213, and are mixed with the air entering from the second injection passage 23 to form a mixed gas of the fuel gas and the air, the air ratio of which is greater than that of the air in the first mixing cavity 22, and then the mixed gas in the second mixing cavity 24 is uniformly ejected from the flame splitting holes 242 through the fin plate on the upper side of the second mixing cavity 24 to form light flame gas.

The implementation principle of the embodiment is as follows: during operation, only need inject the mist of gas and air into first injection passageway 21, then inject the air through second injection passageway 23, after gas and air got into first injection passageway 21, partly mist got into first mixing chamber 22 and jetted through main fire hole 221, form thick flame gas, the mist of another part gets into second mixing chamber 24 through the venthole 214 of first injection passageway 21, and mix with the air that gets into from second injection passageway 23, thereby make the air proportion in the second mixing chamber 24 be greater than the air proportion in the first mixing chamber 22, and form light flame gas from the branch fire hole 242 blowout of fin, high durability and convenient use, air gas proportion regulation is more nimble, the emission is lower, it is more convenient to debug nitrogen oxide.

Example two: compared with the first embodiment, the difference is that: a first fin 222 is fixedly connected above the first mixing chamber 22, and the first fin 222 can communicate the main fire hole 221 with the first mixing chamber 22.

Compared with the first embodiment, the advantages are that: the first fin 222 can uniformly distribute the mixed gas in the first mixing chamber 22 to the main fire holes 221, and the mixed gas can be uniformly sprayed from the main fire holes 221.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a thick and thin combustor, includes two shells (1), is connected with inner shell (2) between two shells (1), its characterized in that: the inner shell (2) is fixedly provided with a first injection channel (21) used for introducing gas and air, a first mixing cavity (22) communicated with the first injection channel (21) is fixedly arranged in the inner shell (2), a main fire hole (221) is formed in the position, corresponding to the upper end of the first mixing cavity (22), of the shell, a second injection channel (23) used for introducing air is further fixedly arranged in the inner shell (2), a second mixing cavity (24) is formed between the inner shell (2) and the outer shell (1), an air passage (231) communicated with the second mixing cavity (24) is further formed in the upper side of the second injection channel (23) in an upside manner of being provided with an air passage (231) communicated with the second mixing cavity (24), air outlet holes (214) capable of being communicated with the second mixing cavity (24) are further formed in two sides of the upper end of the first injection channel (21), a fire distribution hole (242) communicated with the second mixing cavity (24) is formed in the upper end of the second mixing cavity (24), and the first injection channel (21) is located above the second injection, and the second injection passage (23) and the air inlet of the first injection passage (21) are positioned on the same side.

2. A rich-lean burner as claimed in claim 1, wherein: the upper end of the second mixing cavity (24) is provided with a second fin plate (241), and the second fin plate (241) forms a fire distribution hole (242) communicated with the second mixing cavity (24).

3. A rich-lean burner as claimed in claim 1, wherein: the height of the main fire hole (221) is higher than that of the fire dividing hole (242).

4. A rich-lean burner as claimed in claim 3, wherein: the upper end of the main fire hole (221) is 1-3mm higher than the upper end of the fire dividing hole (242).

5. A rich-lean burner as claimed in claim 1, wherein: the upper end of the first mixing cavity (22) is provided with a first fin plate (222) which can communicate the main fire hole (221) with the first mixing cavity (22).

6. A rich-lean burner as claimed in claim 1, wherein: the first injection passage (21) comprises an air suction pipe (211), a mixing pipe and a diffuser pipe (213) which are sequentially connected, the joint of the air mixing pipe (212) and the diffuser pipe (213) is U-shaped, and the rotation angle of the air mixing pipe (212) and the diffuser pipe (213) is 18-23 degrees.

7. A rich-lean burner as claimed in claim 6, wherein: the inlet caliber of the air suction pipe (211) is larger than the outlet caliber of the air suction pipe (211), and the inlet caliber of the diffuser pipe (213) is smaller than the outlet caliber of the diffuser pipe (213).