CN221237863U

CN221237863U - Cold flame full-premix combustion device and gas heating water heater

Info

Publication number: CN221237863U
Application number: CN202322800124.5U
Authority: CN
Inventors: 王志泱; 陈永钊; 常远征
Original assignee: Guangzhou Devotion Home Environment Technology Co ltd
Current assignee: Guangzhou Devotion Home Environment Technology Co ltd
Priority date: 2023-10-19
Filing date: 2023-10-19
Publication date: 2024-06-28
Anticipated expiration: 2033-10-19

Abstract

The utility model discloses a cold flame full-premix combustion device and a gas heating water heater, wherein the cold flame full-premix combustion device comprises a combustor channel cover, a cold flame splitter plate, a combustor and a heat insulation pad, the combustor comprises a flange mounting plate and a combustion cylinder, the flange mounting plate and the combustor channel cover form a cold flame cooling cavity, the cold flame splitter plate divides the cold flame cooling cavity into an upper cooling cavity and a lower cooling cavity, a side communication cavity is arranged between the upper cooling cavity and the lower cooling cavity, and the cold flame splitter plate is provided with an arc-shaped split-flow protrusion. Above-mentioned cold flame full premix burner passes through the structural cooperation such as combustor passageway lid, cold flame flow distribution plate, combustor and heat insulating mattress, and under the structure that cold flame flow distribution plate laid, the gas flow distribution effect is better, and the velocity of flow is stable, can further reduce the temperature of combustor passageway lid, reduces the influence of high temperature to its life.

Description

Cold flame full-premix combustion device and gas heating water heater

Technical Field

The utility model relates to the technical field of full premix burners, in particular to a cold flame full premix combustion device and a gas heating water heater.

Background

Before the gas is ignited and combusted, the gas and the air are fully premixed according to a certain proportion under the combined action of the gas valve, the fan, the premixer and other parts, and the mixed gas is sent into a combustor channel under the action of the fan and then enters into a combustor cylinder for ignition and combustion. The full premix burner has the advantages of high combustion speed, instant combustion of mixed gas after leaving the burner fire hole, sufficient combustion, less emission of CO and NO _x compounds, low noise and the like, and can be used more and more, especially in condensing water heaters and condensing heating furnaces.

The cold flame full premix burner is one of the full premix burners, because in the combustion process of the mixed gas, part of heat can be transferred to the burner channel cover main body through the parts such as the combustion cylinder, so that the burner channel cover main body has higher temperature, the utilization efficiency of the heat is affected, meanwhile, the normal service life of electric equipment on the burner channel cover main body is also affected, a heat insulating plate is generally arranged between the combustion cylinder and the burner channel cover, and is made of aluminum silicate high temperature resistant fiber board material, the heat is isolated, but the temperature on the burner channel cover main body is still high, at the moment, the cold flame full premix burner technology is realized, the heat on the burner channel cover main body is absorbed by utilizing the temperature of the mixed gas through the splitter plate, and the mixed gas after heat absorption is input into the burner for ignition combustion. Because the flow dividing plates with different structures lead to different heat absorption effects of mixed gas in the main body of the burner channel cover, the surface temperature of the main body of the burner channel cover in the prior art is still relatively hot, the normal service life of electrical equipment on the burner channel cover can still be influenced after the burner channel cover is used for a long time, and meanwhile, the main body of the burner channel cover and accessories thereof also need to be prepared from higher high-temperature-resistant materials, so that the production cost is still higher and cannot be further reduced.

Disclosure of utility model

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a cold flame full premix combustion device, which solves the above-mentioned traditional problems, has a better gas diversion effect, and can further reduce the temperature of a burner channel cover, so that the temperature is maintained below 50 ℃, and the influence of high temperature on the service life of the burner channel cover is reduced.

The second purpose of the utility model is to provide a gas heating water heater adopting the cold flame full premix combustion device.

One of the purposes of the utility model is realized by adopting the following technical scheme:

The utility model provides a cold flame full premix burner, includes the combustor passageway lid, installs cold flame flow distribution plate, combustor and the heat insulating mattress on the combustor passageway is covered, be equipped with the installation cavity on the combustor passageway is covered, the combustor includes flange mounting dish and a combustion bowl, the flange mounting dish holding is in the installation cavity and with the combustor passageway lid forms cold flame cooling chamber, the cold flame flow distribution plate is arranged in the cold flame cooling chamber and will the cold flame cooling chamber divide into cooling chamber and lower cooling chamber, go up the cooling chamber with be equipped with the side intercommunication chamber down between the cooling chamber, the middle part orientation of cold flame flow distribution plate be equipped with be the reposition of redundant personnel arch of arcuation in the air inlet department of combustor passageway lid, the heat insulating mattress cover is located on the combustion bowl and cover the surface of flange mounting dish.

Preferably, a minimum distance between an upper wall of the burner channel cover and an upper end of the cold flame diversion plate is smaller than a minimum distance between a lower end of the cold flame diversion plate and the flange mounting plate.

Preferably, the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame diversion plate is 0.4-0.7 of the minimum distance between the lower end of the cold flame diversion plate and the flange mounting plate.

Preferably, the burner channel cover is provided with a plurality of first abutting blocks which are uniformly distributed, the cold flame splitter plate is provided with a plurality of receiving grooves and second abutting blocks, each receiving groove and each first abutting block are correspondingly arranged, the flange mounting plate is provided with a plurality of third abutting blocks which are uniformly distributed, and the third abutting blocks are arranged in a manner of being abutted against the second abutting blocks.

Preferably, a gas collecting cavity is arranged in the middle of the flange mounting plate, and the gas collecting cavity is gradually reduced from the gas flowing direction.

Preferably, the gas collection chamber is arranged in an inverted trapezoid.

Preferably, the combustion cylinder is provided with a plurality of fire hole groups, each fire hole group is uniformly distributed, each fire hole group comprises two main fire holes and two flame stabilizing holes, each main fire hole is in a strip shape, each flame stabilizing hole is circular or oval, each flame stabilizing hole is clamped between two main fire holes, and each flame stabilizing hole is respectively distributed at two opposite ends of a rectangular fire hole part surrounded by each main fire hole.

Preferably, the flame stabilizing holes are elliptical, the length of one main fire hole is equal to the sum of the lengths of three flame stabilizing holes, and the short axis length of the flame stabilizing hole is equal to the width of the main fire hole.

Preferably, the length of the main fire hole is smaller than the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame diversion plate, the length of the main fire hole is larger than the distance between the two main fire holes, the distance between the transversely adjacent fire hole groups is smaller than the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame diversion plate, and the distance between the longitudinally adjacent fire hole groups is equal to the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame diversion plate.

The second purpose of the utility model is realized by adopting the following technical scheme:

the gas heating water heater comprises the cold flame full premix combustion device.

Compared with the prior art, the utility model has the beneficial effects that:

1. The cold flame full premix combustion device is matched with the structures such as the burner channel cover, the cold flame splitter plate, the burner, the heat insulation pad and the like, has a good gas splitting effect and stable flow velocity under the structure of the arrangement of the cold flame splitter plate, can further reduce the temperature of the burner channel cover, ensures that the temperature of the burner channel cover is maintained below 50 ℃, can reach about 40 ℃ on average, and reduces the influence of high temperature on the service life of the burner channel cover.

2. In the cold flame full-premix combustion device, the cold flame splitter plate is arranged at the position of the burner channel cover and matched with the combustion cylinder structure, so that the flame on the combustion cylinder can be stabilized, the flame is prevented from being lifted, and the surface temperature distribution of the combustion cylinder is more uniform.

Drawings

FIG. 1 is a schematic diagram of a cold flame full premix burner according to the present utility model;

FIG. 2 is an exploded view of the cold flame full premix burner shown in FIG. 1;

FIG. 3 is a partial cross-sectional view of the cold flame full premix burner apparatus shown in FIG. 1;

fig. 4 is an enlarged view at a shown in fig. 3;

FIG. 5 is a bottom view of the burner channel cover shown in FIG. 1;

fig. 6 is a front view of the cold flame splitter plate shown in fig. 2.

In the figure: 10. a burner channel cover; 11. an upper cooling chamber; 12. a lower cooling chamber; 13. a side communication chamber; 14. a first abutment block; 20. a cold flame splitter plate; 21. a diverting protrusion; 22. a second abutment block; 30. a burner; 31. a flange mounting plate; 310. a third abutment block; 311. a gas collection chamber; 32. a combustion cylinder; 320. a main fire hole; 321. flame stabilizing holes; 322. a sealing plate; 40. a heat insulating mat; 50. a seal ring; 60. an ignition needle assembly; 70. a fan sealing gasket; 80. a fan assembly.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

Referring to fig. 1-6, a cold flame full premix burner according to a preferred embodiment of the present utility model is configured to be installed in a gas heating water heater or boiler to uniformly distribute a gas mixture of gas and air, and then to ignite and burn the gas mixture to generate high temperature flue gas and system water in a heat exchanger for heating.

Specifically, the cold flame full premix combustion device comprises a burner channel cover 10, a cold flame splitter plate 20 arranged on the burner channel cover 10, a burner 30 and a heat insulation pad 40, wherein the burner channel cover 10 is provided with a mounting cavity, the burner 30 comprises a flange mounting plate 31 and a combustion cylinder 32, the flange mounting plate 31 is accommodated in the mounting cavity and forms a cold flame cooling cavity with the burner channel cover 10, the cold flame splitter plate 20 is arranged in the cold flame cooling cavity and divides the cold flame cooling cavity into an upper cooling cavity 11 and a lower cooling cavity 12, a side communication cavity 13 is arranged between the upper cooling cavity 11 and the lower cooling cavity 12 and is used for prolonging the residence time of mixed gas in the burner channel cover 10, the heat dissipation effect is improved, it is understood that the upper cooling cavity 11 is formed between the upper wall of the burner channel cover 10 and the upper end of the cold flame splitter plate 20, the lower cooling cavity 12 is formed between the lower end of the cold flame splitter plate 20 and the flange mounting plate 31, the side communicating cavity 13 is formed between the side wall of the burner channel cover 10 and the side end of the cold flame splitter plate 20, and is used for communicating the upper cooling cavity 11 with the lower cooling cavity 12, that is, the gap between the cold flame splitter plate 20 and the side wall of the burner channel cover 10, so that the mixed gas entering from the burner channel cover 10 flows along the upper cooling cavity 11, the side communicating cavity 13 and the lower cooling cavity 12 in sequence, and then flows into the combustion cylinder 32 to form multiple roundabout flows; the middle part of the cold flame splitter plate 20 is provided with a splitting protrusion 21 which is approximately arc-shaped and is used for buffering the mixed gas towards the gas inlet of the burner channel cover 10, so that the mixed gas can be uniformly diffused or distributed around, the air flow impact of the mixed gas on the cold flame splitter plate 20 can be counteracted in a small part, and the heat on the cold flame splitter plate 20, the burner channel cover 10 and other components can be conveniently absorbed; the heat insulation pad 40 is sleeved on the combustion cylinder 32 and covers the outer surface of the flange mounting plate 31, and is used for blocking heat generated after the mixed gas is ignited on the combustion cylinder 32, reducing the heat receiving capacity of the flange mounting plate 31, and further reducing the excessive heat transfer to the burner channel cover 10.

As shown in fig. 3, the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame splitter plate 20 is smaller than the minimum distance between the lower end of the cold flame splitter plate 20 and the flange mounting plate 31, that is, the distance between the two sides of the cold flame splitter plate 20 and the burner channel cover 10 and the flange mounting plate 31, so that the mixed gas fits the burner channel cover 10 as much as possible, so as to facilitate the heat dissipation of the burner channel cover 10, in one embodiment, the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame splitter plate 20, the distance between the side wall of the burner channel cover 10 and the side end of the cold flame splitter plate 20, and the minimum distance between the lower end of the cold flame splitter plate 20 and the flange mounting plate 31 are sequentially increased, so that the flow of the mixed gas is gradually narrowed, the gradually enlarged flow is split and mixed, the mixing uniformity between the gas and the air is further improved, the mixing effect of the mixed gas before the unburned is also improved, and the mixed gas is preheated, and the mixed gas is combusted more fully. Optionally, the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame diversion plate 20 is 0.4-0.7, such as 0.4, 0.5, 0.6, 0.7, of the minimum distance between the lower end of the cold flame diversion plate 20 and the flange mounting plate 31. Preferably, the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame diversion plate 20 is 0.5 of the minimum distance between the lower end of the cold flame diversion plate 20 and the flange mount 31.

In this embodiment, as shown in fig. 3 and 5, a plurality of first abutting blocks 14 are uniformly distributed on the burner channel cover 10, a plurality of receiving grooves and second abutting blocks 22 are provided on the cold flame splitter plate 20, each receiving groove is correspondingly provided with each first abutting block 14 and is used for receiving the first abutting block 14 so as to prevent the cold flame splitter plate 20 from moving under the action of the mixed gas, a plurality of third abutting blocks 310 are uniformly distributed on the flange mounting plate 31, and each third abutting block 310 is correspondingly abutted with each second abutting block 22 and is used for receiving the buffer of the mixed gas to the cold flame splitter plate 20. In other embodiments, the first abutment block 14 may be provided directly on the cold flame splitter plate 20 with corresponding sockets provided on the burner channel cover 10. Through the above arrangement, the upper cooling cavity 11, the lower cooling cavity 12 and the side communicating cavity 13 are formed, and in other embodiments, the upper cooling cavity 11, the lower cooling cavity 12 and the side communicating cavity 13 may be arranged in a manner, which is not described herein. In the above embodiment, the lengths of the first abutment block 14, the second abutment block 22, and the third abutment block 310 are all the same.

As shown in fig. 3 and 6, the split-flow protrusion 21 protrudes upward from the cold flame split-flow plate 20 and is placed in the air inlet of the burner channel cover 10, so that the mixed gas flows into the upper cooling chamber 11 from the air inlet, and can be rapidly dispersed to both sides when the split-flow protrusion 21 is flushed. The middle part of flange mounting disc 31 is equipped with gas collection chamber 311, and gas collection chamber 311 is the setting that reduces gradually from the gas flow direction, and on the longitudinal section, gas collection chamber 311 is the trapezoidal setting of falling, and gas collection chamber 311 cooperates cooling chamber 12 to carry out the collection of gas down to in order to collect the mixed gas better and remit into combustion cylinder 32 again.

As shown in fig. 3 and 4, the combustion cylinder 32 is welded to the flange 31, the combustion cylinder 32 is generally cylindrical and is communicated with the gas collecting cavity 311, the combustion cylinder 32 is provided with a plurality of fire hole groups, each fire hole group is uniformly distributed, in one of the fire hole groups, the fire hole group comprises two main fire holes 320 and two flame stabilizing holes 321, the main fire holes 320 are generally in a strip shape, the flame stabilizing holes 321 are generally circular or elliptical, the two flame stabilizing holes 321 are clamped between the two main fire holes 320, each flame stabilizing hole 321 is respectively arranged at two opposite ends of a rectangular fire hole part surrounded by the two main fire holes 320, namely, the total length of the two flame stabilizing holes 321 is smaller than the length of one main fire hole 320, in the embodiment, the flame stabilizing holes 321 are elliptical, the length of one main fire hole 320 is equal to the sum of the lengths of the three flame stabilizing holes 321, and the short axis length of the flame stabilizing holes 321 is equal to the width of the main fire hole 320. The main fire hole 320 and the flame stabilizing hole 321 are matched to stabilize combustion to prevent fire drop, and meanwhile, the cold flame splitter plate 20 is matched to ensure that gas is mixed more fully under the action of buffering and distributing gas, the heat absorption effect is better, the preheating temperature of mixed gas is higher, the combustion is more sufficient, and the combustion efficiency can be greatly improved. In one embodiment, the length of the main fire holes 320 is smaller than the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame diversion plate 20, the length of the main fire holes 320 is larger than the distance between two main fire holes 320, the distance between the transversely adjacent fire hole groups is smaller than the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame diversion plate 20, and the distance between the longitudinally adjacent fire hole groups is equal to the minimum distance between the upper wall of the burner channel cover 10 and the upper end of the cold flame diversion plate 20. By the arrangement, the condition that the air flow speed is low and tempering phenomenon possibly occurs during low-load operation can be avoided.

In another embodiment, the bottom of the combustion cylinder 32 may be welded separately to form a bottom seal, or an integrally formed sealing bottom is formed, or other sealing structures are provided, in this embodiment, for example, 3, the bottom of the combustion cylinder 32 is provided with a seal 322 for sealing the bottom of the combustion cylinder 32, specifically, the outer diameter of the seal 322 is equal to the inner diameter of the combustion cylinder 32, and the seal 322 may be welded to the bottom of the combustion cylinder 32 by welding, one end facing the inside of the combustion cylinder 32 is provided with an arc-shaped upward bulge, and the height of the upward bulge is 0.02-0.2 of the length of the combustion cylinder 32, preferably, the height of the upward bulge is 0.04-0.1 of the length of the combustion cylinder 32.

The heat insulating mat 40 is provided according to a sealing structure between the burner channel cover 10 and the heat exchanger. The insulation blanket 40 is generally made of aluminum silicate high temperature resistant fiberboard material or other high temperature resistant insulation material.

Referring to fig. 1 and 2, the burner channel cover 10 is approximately in a shape of a pot cover, a mounting hole is formed in one side of the burner channel cover 10, a mounting groove is formed in one end of the burner channel cover 10 facing the combustion cylinder 32, the cold flame full-premixed combustion device further comprises a sealing ring 50, an ignition needle assembly 60 (comprising an igniter and a detection needle), a fan sealing gasket 70 and a fan assembly 80, the ignition needle assembly 60 is mounted on the mounting hole and extends into the combustion cylinder 32, the ignition needle assembly is arranged close to the combustion cylinder 32, the sealing ring 50 is mounted on the mounting groove, a good sealing effect can be achieved through the effect of the sealing ring 50 when the heat exchanger is combined, the fan sealing gasket 70 is mounted between an air inlet of the burner channel cover 10 and the fan assembly 80 and used for adjusting the air inlet amount, and meanwhile, external air can be prevented from entering the burner 30 through a chimney and then entering the furnace body when the burner is stopped.

The cold flame full premix combustion device is matched with the structures such as the burner channel cover 10, the cold flame splitter plate 20, the burner 30, the heat insulation pad 40 and the like, under the arrangement structure of the cold flame splitter plate 20, the gas splitter effect is good, the flow speed is stable, the temperature of the burner channel cover 10 can be further reduced, the temperature is kept below 50 ℃, the temperature can reach about 40 ℃ on average, the influence of high temperature on the service life of the burner channel cover is reduced, meanwhile, the cold flame splitter plate 20 is arranged at the arrangement position of the burner channel cover 10, the structure of the combustion cylinder 32 is matched, flame on the combustion cylinder 32 can be stabilized, flame is prevented from being lifted, and the surface temperature distribution of the combustion cylinder 32 is more uniform.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a cold flame full premix burner, its characterized in that, is in including combustor passageway lid, install cold flame flow distribution plate, combustor and heat insulating mattress on the combustor passageway lid, be equipped with the installation cavity on the combustor passageway lid, the combustor includes flange mounting dish and a combustion bowl, the flange mounting dish holding is in the installation cavity and with the combustor passageway lid forms cold flame cooling chamber, cold flame flow distribution plate is arranged in the cold flame cooling chamber and will cold flame cooling chamber divide into cooling chamber and lower cooling chamber, go up the cooling chamber with be equipped with the side intercommunication chamber down between the cooling chamber, the middle part of cold flame flow distribution plate is towards the air inlet department of combustor passageway lid is equipped with and is the arcuation reposition of redundant personnel arch, the heat insulating mattress cover is located on the combustion bowl and cover the surface of flange mounting dish.

2. The cold flame full premix combustion device of claim 1 wherein a minimum distance between an upper wall of the burner channel cover and an upper end of the cold flame splitter plate is less than a minimum distance between a lower end of the cold flame splitter plate and the flange mounting plate.

3. The cold flame full premix combustion device of claim 2 wherein a minimum distance between an upper wall of the burner channel cover and an upper end of the cold flame splitter plate is 0.4-0.7 of a minimum distance between a lower end of the cold flame splitter plate and the flange mounting plate.

4. The cold flame full premix combustion device according to claim 1, wherein a plurality of first abutting blocks are uniformly distributed on the burner channel cover, a plurality of receiving grooves and second abutting blocks are formed on the cold flame splitter plate, the receiving grooves and the first abutting blocks are correspondingly arranged, a plurality of third abutting blocks are uniformly distributed on the flange mounting plate, and the third abutting blocks are arranged in an abutting mode with the second abutting blocks.

5. The cold flame full premix combustion device of claim 1, wherein a gas collection chamber is provided in the middle of the flange mounting plate, and the gas collection chamber is gradually reduced from the gas flow direction.

6. The cold flame full premix burner apparatus of claim 5, wherein the gas collection chamber is arranged in an inverted trapezoid.

7. The cold flame full premix combustion device of claim 1, wherein a plurality of fire hole groups are arranged on the combustion cylinder, each fire hole group is uniformly distributed, each fire hole group comprises two main fire holes and two flame stabilizing holes, each main fire hole is in a strip shape, each flame stabilizing hole is circular or oval, the two flame stabilizing holes are clamped between the two main fire holes, and each flame stabilizing hole is respectively distributed at two opposite ends of a rectangular fire hole part surrounded by the two main fire holes.

8. The cold flame full premix burner of claim 7, wherein said flame stabilizing holes are oval, the length of one of said main flame holes is equal to the sum of the lengths of three of said flame stabilizing holes, and the short axis length of said flame stabilizing hole is equal to the width of said main flame hole.

9. The cold flame full premix burner of claim 8, wherein the length of the main fire holes is smaller than the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame splitter plate, the length of the main fire holes is larger than the distance between two main fire holes, the distance between the transversely adjacent fire hole groups is smaller than the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame splitter plate, and the distance between the longitudinally adjacent fire hole groups is equal to the minimum distance between the upper wall of the burner channel cover and the upper end of the cold flame splitter plate.

10. A gas heating water heater comprising a cold flame fully premixed burner according to any one of claims 1 to 9.