CN219140770U - Full premix burner and full premix gas heating water heater thereof - Google Patents

Abstract

The utility model discloses a full premix burner and a full premix gas heating water heater thereof, wherein the full premix burner comprises a burner channel cover and a combustion cylinder, the burner channel cover is provided with a gas channel, a cooling cavity and a plurality of diversion holes, the gas channel is communicated with the cooling cavity, each diversion hole is communicated with the cooling cavity, mixed gas is conveyed into the cooling cavity from the gas channel, the burner channel cover is cooled, and the preheated mixed gas is ignited and combusted on the combustion cylinder after being shunted through the diversion holes. Above-mentioned full premix combustor flows into the cooling chamber through the mixed gas from the gas passage, cools down the combustor passageway lid, can further reduce the temperature of combustor passageway lid, reduces the influence of high temperature flue gas to its life, reduces its overheated risk of appearance simultaneously, and the mixed gas rethread reposition of redundant personnel hole after preheating flows to the combustion bowl, because low temperature gas after preheating, can improve combustion speed, can strengthen combustion stability simultaneously.

Description

Full premix burner and full premix gas heating water heater thereof

Technical Field

The utility model relates to the technical field of gas heating water heaters, in particular to a full premix burner and a full premix gas heating water heater thereof.

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 barrel to be ignited and combusted. The combustion speed of the full premix burner is not limited by the mixing time and the mixing space, and the full premix burner has the advantages of high combustion speed, instant combustion of the mixed gas after leaving the burner fire hole, full combustion, CO and NO _x The full premix burner has the advantages of less compound emission, low noise and the like, so that the full premix burner is increasingly applied, and particularly the full premix burner is applied to condensing water heaters and condensing heating furnaces.

Full premix burner with sufficient combustion, high thermal efficiency and CO and NO _x The compound discharges lowly and has obvious advantage than conventional atmospheric burner, but the produced high temperature flue gas of full premix combustor is easy to accumulate on the burner passageway lid main part, and on the one hand high temperature flue gas can reduce the life of combustor and surrounding electrical components, and on the other hand the overheated risk that also can increase equipment and receive the damage of combustor.

Most of the burners on the market are insulated by installing thicker insulating boards (generally aluminum silicate high temperature resistant fiber board materials) to prevent the burner channel cover main body from overheating. To a certain extent, the above conventional technology can solve the problem of higher temperature of the burner channel cover main body, but brings other problems as follows: 1. the aluminum silicate fiber board can isolate most of heat generated by combustion, so that the temperature of the burner channel cover main body is reduced, but as the service time is prolonged, heat is still transferred through contact between metals, so that the temperature is still increased, and the heat cannot be completely emitted. 2. The internal environment of the full premix heat exchanger is high in temperature, water vapor exists, and the aluminum silicate fiber board can be cracked and damaged, so that the heat insulation effect is further reduced. 3. The heat insulation plate is used, so that the self cost and the maintenance cost of the full premix burner are increased.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a full premix burner, which solves the above-mentioned conventional problems, and has a cooling cavity for cooling a main body of a burner channel cover, so that the temperature of the main body of the burner channel cover can be further reduced, the influence of high-temperature flue gas on the service life of the burner channel cover is reduced, and the risk of overheating is reduced.

The second purpose of the utility model is to provide a full premix gas heating water heater adopting the full premix burner.

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

the utility model provides a full premix combustor, includes the combustor passageway lid and installs the combustion bowl of combustor passageway lid, the combustor passageway lid is equipped with gas passage, cooling chamber and a plurality of branch flow hole, gas passage with the cooling chamber is linked together, each branch flow hole with the cooling chamber is linked together, makes the mixed gas follow gas passage carries to the cooling chamber is interior, to the combustor passageway lid cools off, and the mixed gas after the preheating rethread the branch flow hole shunts the back, ignites the burning on the combustion bowl.

Preferably, the burner channel cover comprises a cover main body, a channel pipe and a flow dividing plate, wherein a first blocking piece and a second blocking piece are arranged in the cover main body, the first blocking piece, the second blocking piece, the inner wall of the cover main body and the flow dividing plate form the cooling cavity, the channel pipe is communicated with the cooling cavity, and the flow dividing hole is formed in the flow dividing plate.

Preferably, the first blocking piece is in a clamping opening structure, and the clamping opening of the first blocking piece is arranged back to the channel pipe; the second blocking piece is of a Y-shaped structure, and a Y-shaped opening of the second blocking piece is arranged in a clamping opening of the first blocking piece.

Preferably, the first blocking piece and the second blocking piece divide the cover main body into two flow dividing channels which are symmetrically arranged, the flow dividing channels comprise a first flow channel, a second flow channel, a third flow channel, a fourth flow channel and a fifth flow channel along the gas flowing direction, the minimum caliber of the first flow channel is larger than the maximum caliber of the second flow channel, the maximum caliber of the second flow channel is not larger than the minimum caliber of the third flow channel, the minimum caliber of the third flow channel is not smaller than the maximum caliber of the fourth flow channel, and the maximum caliber of the fourth flow channel is not larger than the minimum caliber of the fifth flow channel.

Preferably, the flow dividing plate comprises a plate main body, a mounting part extending outwards from the plate main body and an abutting part, and each flow dividing hole is arranged above the first blocking piece and forms a flow dividing area with a triangular structure; the cover main body is provided with a first mounting hole, a clamping groove and an abutting projection, and the first mounting hole is matched with the clamping groove to fix the mounting part; the abutting projection abuts against the abutting portion.

Preferably, a plurality of heat absorbing windows are arranged between the plate main body and the inner wall of the cover main body, and the heat absorbing windows are uniformly arranged.

Preferably, the fully premixed burner further comprises a heat insulation pad and a burner flange, wherein the heat insulation pad is used for separating the burner channel cover from the burner flange, and the burner flange is used for installing the combustion cylinder.

Preferably, the heat insulation pad comprises an outer ring, an inner ring and a plurality of connecting strips for connecting the outer ring and the inner ring, wherein the connecting strips are uniformly distributed and form a plurality of annular holes with the outer ring and the inner ring.

Preferably, the burner flange plate comprises a plate body and a boss, wherein the plate body is used for compacting the flow dividing plate and the heat insulation pad, and the boss is used for collecting mixed gas flowing out from the flow dividing hole.

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

a full premix gas heating water heater comprises the full premix burner.

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

according to the full premix burner, the burner channel cover and the combustion cylinder are arranged, the burner channel cover is provided with the gas channel, the cooling cavity and the flow dividing holes, mixed gas flows into the cooling cavity from the gas channel, the temperature of the burner channel cover is reduced, the temperature of the burner channel cover can be further reduced, the influence of high-temperature flue gas on the service life of the burner channel cover is reduced, meanwhile, the risk of overheating is reduced, and the preheated mixed gas flows out to the combustion cylinder through the flow dividing holes.

According to the full premix burner disclosed by the utility model, the cooling cavity of the burner channel cover is used for radiating the burner channel cover under the condition that a heat insulation pad is not needed, so that a better cooling effect is also achieved, and the cost and the maintenance cost are lower.

According to the full premix burner, the cooling cavity of the burner channel cover is matched with the heat insulation pad to improve the cooling effect of the cooling cavity on the burner channel cover, and the low-temperature mixed gas can absorb heat generated by the burner when radiating the burner channel cover so as to preheat the burner channel cover, so that the low-temperature mixed gas can play a role in improving the combustion speed and enhancing the combustion stability after being preheated.

Drawings

FIG. 1 is a schematic diagram of a full premix burner and heat exchanger in combination according to a preferred embodiment of the present utility model;

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

FIG. 3 is a schematic view of the full premix burner of FIG. 1 from another perspective;

FIG. 4 is an exploded view of the fully premixed burner shown in FIG. 3;

FIG. 5 is a partial cross-sectional view of the full premix burner shown in FIG. 3;

FIG. 6 is a top view of the burner channel cover shown in FIG. 3;

FIG. 7 is a schematic illustration of the flow of the gas shown in FIG. 3 within the burner channel cover.

In the figure: 100. a full premix burner; 10. a burner channel cover; 11. a cover main body; 110. a first blocking piece; 111. a second blocking piece; 112. a first flow passage; 113. a second flow passage; 114. a third flow passage; 115. a fourth flow passage; 116. a fifth flow passage; 117. a clamping groove; 118. abutting the bump; 12. a channel tube; 120. a circular flange; 20. a diverter plate; 21. a plate main body; 210. a diversion aperture; 211. a heat absorption window; 22. a mounting part; 23. an abutting portion; 30. a heat insulating mat; 31. an outer ring; 32. an inner ring; 33. a connecting strip; 40. a burner flange; 41. a tray body; 42. a boss; 420. a blue plate air outlet hole; 50. a combustion cylinder; 60. a detection needle; 70. an ignition needle; 80. a seal ring; 200. a blower; 300. a heat exchanger.

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 to 7, a fully premixed burner 100 according to a preferred embodiment of the present utility model is installed in a fully premixed gas heating water heater, the gas heating water heater further comprises a premixer, a fan 200, a water pump, a gas valve, a heat exchanger 300, and the like, wherein the combustion part of the fully premixed burner 100 is installed in the heat exchanger 300, and the principle is that: the water pump and the fan 200 are started, water circulation is formed under the action of the water pump, and under the action of the fan 200, air is uniformly mixed with fuel gas regulated by a fuel gas valve in the premixer, and then the mixture is input into the full premix burner 100 to be ignited for combustion, and high-temperature flue gas generated by combustion and system water in the heat exchanger 300 are heated.

Specifically, the full premix burner 100 includes a burner channel cover 10, a splitter plate 20 mounted on the burner channel cover 10, a heat insulating mat 30, a burner flange 40, and a burner cylinder 50. The burner channel cover 10 is provided with a detecting needle 60 and an ignition needle 70, the detecting needle 60 is used for detecting the combustion condition of the combustion cylinder 50, and the ignition needle 70 is used for igniting the mixed gas on the combustion cylinder 50.

The burner channel cover 10 is provided with a gas channel, a cooling cavity and a plurality of diversion holes 210, the gas channel is communicated with the cooling cavity, each diversion hole 210 is communicated with the cooling cavity, so that mixed gas is conveyed into the cooling cavity from the gas channel, the burner channel cover 10 is cooled, and the preheated mixed gas is shunted through the diversion holes 210 and is ignited to burn on the combustion cylinder 50. That is, the cooling cavity may be divided by some modules to divide the interior cavity of the burner channel cover 10 to form a labyrinth or other form of cooling structure that can increase the residence time of the mixed gas within the burner channel cover 10.

In this embodiment, as shown in fig. 6, the burner channel cover 10 includes a cover main body 11, a channel tube 12 and a flow dividing plate 20, a first blocking piece 110 and a second blocking piece 111 are disposed in the cover main body 11, the first blocking piece 110, the second blocking piece 111, the inner wall of the cover main body 11, and the flow dividing plate 20 form the cooling cavity, the channel tube 12 is communicated with the cooling cavity, and the flow dividing hole 210 is disposed on the flow dividing plate 20. It is understood that the inner cavity of the cover body 11 is divided by the first and second stoppers 110 and 111 to form a labyrinth-like cooling cavity. In one embodiment, the first blocking piece 110 has a clamping opening structure, and the clamping opening of the first blocking piece 110 is disposed opposite to the channel tube 12; the second blocking piece 111 has a Y-shaped structure, and a Y-shaped opening of the second blocking piece 111 is disposed in a clamping opening of the first blocking piece 110. That is, the first blocking piece 110 splits the gas inlet of the channel pipe 12, so that the mixed gas is divided into two streams flowing in the inner cavity of the cover main body 11, then enters the Y cavity of the first blocking piece 110 from the bifurcation between the Y-shaped opening of the first blocking piece 110 and the second blocking piece 111 after colliding with the inner wall of the cover main body 11 or the second blocking piece 111, and the two streams meet and finally flow out from the splitting hole 210.

As can be appreciated, as shown in fig. 6, the first blocking piece 110 and the second blocking piece 111 divide the cover main body 11 into two symmetrically arranged flow dividing channels, the flow dividing channels include a first channel 112, a second channel 113, a third channel 114, a fourth channel 115 and a fifth channel 116 along the gas flowing direction, the minimum caliber of the first channel 112 is larger than the maximum caliber of the second channel 113, the maximum caliber of the second channel 113 is not larger than the minimum caliber of the third channel 114, the minimum caliber of the third channel 114 is not smaller than the maximum caliber of the fourth channel 115, the maximum caliber of the fourth channel 115 is not larger than the minimum caliber of the fifth channel 116, so that the mixed gas passes through the narrowing of the second channel 113, then the widening of the third channel 114, then the narrowing of the fourth channel 115, and finally the widening of the fifth channel 116, the mixed gas of the flow dividing channels meets or merges in the fifth channel 116, and then is output outwards, thereby further improving the residence time of the mixed gas in the cover main body 11.

Alternatively, one end of the second blocking piece 111 may be fixed to the inner wall of the cap body 11, or one end of the second blocking piece 111 may have a gap with the inner wall of the cap body 11 so that the mixed gas is re-divided or directly discharged from the dividing hole 210 after colliding in the gap. Preferably, one end of the second blocking piece 111 is fixed to the inner wall of the cover main body 11.

As shown in fig. 3 to 5, the cover main body 11 is substantially in the shape of a pot cover to increase the cavity volume of the cooling cavity, and the cover main body 11 is provided with a plurality of lugs for fixedly connecting with the heat exchanger 300, and the lugs are uniformly distributed. The cover main body 11 is further provided with a first annular step with an annular groove, a sealing ring 80 is arranged in the annular groove, and the heat exchanger 300 is in sealing connection with the cover main body 11 after being installed under the action of the sealing ring 80. The cover main body 11 is further provided with a second annular step provided with a plurality of first mounting holes and clamping grooves 117, and the first mounting holes are matched with the clamping grooves 117 to fix the splitter plate 20. In another embodiment, the second annular step is further provided with an abutment projection 118 at the inlet of the channel tube 12, and the abutment projection 118 is used for abutting against the splitter plate 20, so that the splitter plate 20 is more firmly installed. Wherein the abutment bump 118 has a protruding portion located in the inlet of the channel tube 12, the height of the protruding portion being 1/4-1/3 of the inner diameter of the inlet of the channel tube 12.

Optionally, the cover main body 11 is further provided with symmetrically arranged mounting blocks, the mounting blocks are located on the second flow channel 113, the mounting blocks are provided with second mounting holes and long waist holes, the second mounting holes are used for fixing the splitter plate 20, the long waist holes are used for mounting the detecting needle 60 or the ignition needle 70, and the detecting needle 60 and the ignition needle 70 are oppositely arranged, namely, are respectively arranged on one of the mounting blocks. Optionally, a first square sealing gasket is arranged between the detecting needle 60 and the cover main body 11, so that a better sealing effect is achieved, and similarly, a second square sealing gasket is arranged between the ignition needle 70 and the cover main body 11. The second blocking piece 111 is further provided with a third mounting hole, and the third mounting hole is used for being matched with the first mounting hole, the second mounting hole and the abutting bump 118 to fixedly mount the splitter plate 20.

The channel tube 12 is a channel with a semi-elliptic structure, the gas channel is arranged on the channel tube 12, one end of the channel tube 12 far away from the cover main body 11 is provided with a circular flange 120, and the channel tube 12 is connected with the fan 200 through the circular flange 120. In one embodiment, the cap body 11 and the channel tube 12 are integrally formed by a casting process.

The flow dividing plate 20 is attached to the cover body 11 for dividing the mixed gas in the cover body 11, and the flow dividing plate 20 includes a plate body 21, an attachment portion 22 extending outwardly from the plate body 21, and an abutment portion 23. The plate body 21 has a substantially circular shape, and each of the flow dividing holes 210 is provided in a region of the plate body 21 above the first blocking piece 110, and each of the flow dividing holes 210 forms a flow dividing region of a triangular structure, similar to the first blocking piece 110, so that the mixed gas can flow along the flow dividing flow passage. The aperture of the tap hole 210 is calculated according to the air inlet area and the combustion area of the combustion cylinder 50, and the air inlet area is larger than the combustion area, so as to ensure the flame stability of the combustion cylinder 50 and prevent the flame from backfire or flame-out phenomenon, wherein the backfire is generated because the flame is retracted into the fire hole when the speed of the fuel gas leaving the fire hole is smaller than the combustion speed, so that the mixed gas is combusted and heated in the combustor, and incomplete combustion is formed, and the combustor burns out. In one embodiment, the aperture of the tap hole 210 is larger than the aperture of the exit hole of the combustion can 50 to ensure that the intake velocity is greater than the exit velocity. Optionally, the plate body 21 is provided with positioning holes that cooperate with the third mounting holes. The plate body 21 is also provided with an avoidance gap for avoiding the mounting block. In this embodiment, a plurality of heat absorbing windows 211 (as shown in fig. 7) are disposed between the plate main body 21 and the inner wall of the cover main body 11, and each heat absorbing window is uniformly arranged, so that when the burner flange 40 is mounted on the cover main body 11, part of the heat of the burner flange 40 can be absorbed through the heat absorbing windows 211, so as to reduce the heat on the burner flange 40, and further raise the temperature of the mixed gas.

The number of the mounting portions 22 is 7 in this embodiment, the mounting portions 22 are clamped in the clamping grooves 117, and then the first mounting holes, the heat insulation pad 30 and the burner flange 40 are matched for fixing. Since the mounting portion 22 is clamped in the clamping groove 117, the mounting portion 22 and the second annular step form a planar shape, so as to improve the sealing performance of the device. The contact portion 23 is a substantially trapezoidal flange, and the tip of the contact portion 23 contacts the contact projection 118 to block and split the mixed gas entering from the channel pipe 12.

The heat insulating mat 30 has a substantially disk-shaped structure for separating the burner channel cover 10 from the burner flange 40, preventing the burner channel cover 10 from directly contacting the burner flange 40, and reducing the temperature of the burner channel cover 10. The heat insulation pad 30 comprises an outer ring 31, an inner ring 32 and a plurality of connecting strips 33 for connecting the outer ring 31 and the inner ring 32, wherein each connecting strip 33 is uniformly distributed and is provided with a plurality of annular holes corresponding to the outer ring 31 and the inner ring 32, and the annular holes are arranged corresponding to the heat absorption windows 211, so that on one hand, the low-temperature mixed gas can absorb part of heat of the burner flange 40, and on the other hand, the heat insulation pad 30 is arranged on the burner channel cover 10 and the burner flange 40, and the influence of water vapor in high-temperature flue gas on the burner channel cover can be avoided. Optionally, the annular hole is provided with a first avoidance space for installing some devices on the avoidance cover main body 11, which is not described herein. In one embodiment, the insulation pad 30 is, but is not limited to, aluminum silicate fiberboard. In other embodiments, the fully premixed burner 100 may be equipped with the heat insulation pad 30 or not equipped with the heat insulation pad 30, and may be added or removed according to circumstances.

The burner flange 40 is installed on the cover main body 11 and is used for installing the combustion cylinder 50, the burner flange 40 comprises a disk body 41 and a boss 42, the disk body 41 is located on a cooling cavity of the burner channel cover 10 and compresses the flow dividing plate 20 and the heat insulation pad 30 to enable mixed gas to flow along a flow dividing flow channel of the cooling cavity, wherein a second clearance gap and a plurality of convex hulls are arranged on the disk body 41 and are used for carrying out clearance on the detection needle 60 and the ignition needle 70, the convex hulls are uniformly distributed and are used for reinforcing the strength of the disk body 41, and in one embodiment, the convex hulls are arranged in a strip-shaped structure. The boss 42 has a substantially cylindrical structure, and the boss 42 is located above the split area, and is used for collecting the mixed gas flowing out from the split holes 210, and then distributing and burning the mixed gas through the combustion cylinder 50. Optionally, a flange air outlet hole 420 is arranged in the middle of the top end of the boss 42, and the flange air outlet hole 420 and the combustion cylinder 50 are coaxially arranged.

The combustion cylinder 50 is installed on the boss 42, and is used for igniting and burning the mixed gas after being distributed, so that stable combustion is realized, in this embodiment, the combustion cylinder 50 adopts the structure of CN217235584U, and the structure of the combustion cylinder 50 of the present utility model can also adopt other types of combustion cylinders 50, which are not described herein.

The working principle of the full premix burner 100 of the utility model is as follows: as shown in fig. 1 and 7, the blower 200 is started, the gas valve is opened, the blower 200 sucks outdoor low-temperature air and gas into the premixer, the premixed low-temperature mixed gas enters the cover main body 11 through the gas channel, the premixed low-temperature mixed gas is divided into two flow-dividing channels by the first baffle block 110, the second baffle block 111, the flow-dividing plate 20 and the burner flange 40 in the cover main body 11, the flow-dividing flow starts to flow-dividing, the low-temperature mixed gas continuously flows into the burner channel cover 10, the flow-dividing channels are preheated, heat generated by the burner in the burner channel cover 10 is taken away, the preheated mixed gas is collected at the Y-shaped opening of the second baffle block 111 after flow-dividing, is collected in the boss 42 of the burner flange 40 after flow-dividing through the flow-dividing hole 210 after flow-dividing, and finally flows into the burner cylinder 50 for ignition and combustion.

According to the full premix burner 100, the burner channel cover 10 and the combustion cylinder 50 are arranged, the burner channel cover 10 is provided with the gas channel, the cooling cavity and the flow dividing hole 210, mixed gas flows into the cooling cavity from the gas channel, the burner channel cover 10 is cooled, the temperature of the burner channel cover 10 can be further reduced, the influence of high-temperature flue gas on the service life of the burner channel cover 10 is reduced, meanwhile, the risk of overheating is reduced, the preheated mixed gas flows out to the combustion cylinder 50 through the flow dividing hole 210, and the combustion speed can be improved and the combustion stability can be enhanced as the low-temperature gas is preheated.

The flow dividing holes 210 can slow down the flow speed of the mixed gas in the cooling cavity, increase the residence time of the mixed gas, and the boss 42 is used for buffering the mixed gas flowing out of the flow dividing holes 210, so that the mixed gas is conveyed into the combustion cylinder 50 after being stabilized, and the combustion stability can be enhanced.

The full premix burner 100 of the utility model dissipates heat to the burner channel cover 10 through the cooling cavity of the burner channel cover 10 without using the heat insulation pad 30, and also has better cooling effect, so that the cost and maintenance cost are lower.

The full premix burner 100 of the utility model improves the cooling effect of the cooling cavity on the burner channel cover 10 by the cooling cavity of the burner channel cover 10 and the function of the heat insulation pad 30, and the low-temperature mixed gas can absorb the heat generated by the burner while radiating the heat of the burner channel cover 10 to preheat the burner channel cover, so that the low-temperature mixed gas can improve the combustion speed and enhance the combustion stability after being preheated.

In another embodiment, the utility model further provides a full premix gas heating water heater, which comprises the full premix burner 100 of the embodiment, wherein the full premix burner 100 is provided with a cooling cavity, the burner channel cover 10 is cooled, the temperature of the burner channel cover 10 can be further reduced, the influence of high-temperature flue gas on the service life of the burner channel cover 10 is reduced, and meanwhile, the risk of overheating is reduced.

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 (10)

1. The full premix burner is characterized by comprising a burner channel cover and a combustion cylinder arranged on the burner channel cover, wherein the burner channel cover is provided with a gas channel, a cooling cavity and a plurality of diversion holes, the gas channel is communicated with the cooling cavity, each diversion hole is communicated with the cooling cavity, so that mixed gas is conveyed from the gas channel to the cooling cavity, the burner channel cover is cooled, and the preheated mixed gas is shunted through the diversion holes and is ignited to burn on the combustion cylinder.

2. The full premix burner of claim 1, wherein the burner channel cover comprises a cover body, a channel tube and a splitter plate, a first blocking piece and a second blocking piece are arranged in the cover body, the first blocking piece, the second blocking piece, the inner wall of the cover body and the splitter plate form the cooling cavity, the channel tube is communicated with the cooling cavity, and the splitter hole is formed in the splitter plate.

3. The full premix burner of claim 2 wherein said first baffle is in a pinch-like configuration, said pinch of said first baffle being disposed away from said channel tube; the second blocking piece is of a Y-shaped structure, and a Y-shaped opening of the second blocking piece is arranged in a clamping opening of the first blocking piece.

4. A full premix burner as in claim 3, wherein said first and second baffle blocks divide said cover body into two symmetrically disposed flow-dividing passages, said flow-dividing passages comprising a first flow passage, a second flow passage, a third flow passage, a fourth flow passage and a fifth flow passage along the direction of gas flow, said first flow passage having a minimum diameter greater than the maximum diameter of said second flow passage, said second flow passage having a maximum diameter not greater than the minimum diameter of said third flow passage, said third flow passage having a minimum diameter not less than the maximum diameter of said fourth flow passage, said fourth flow passage having a maximum diameter not greater than the minimum diameter of said fifth flow passage.

5. The full premix burner of claim 2, wherein the splitter plate comprises a plate body, a mounting portion extending outwardly from the plate body, and an abutment portion, each of the splitter holes being disposed above the first baffle block and forming a splitter region of a triangular configuration; the cover main body is provided with a first mounting hole, a clamping groove and an abutting projection, and the first mounting hole is matched with the clamping groove to fix the mounting part; the abutting projection abuts against the abutting portion.

6. The full premix burner of claim 5, wherein a plurality of heat absorbing windows are arranged between the plate body and the inner wall of the cover body, and each heat absorbing window is arranged in a uniform arrangement.

7. The full premix burner of claim 2 further comprising a heat shield and a burner flange, wherein the heat shield is configured to separate the burner channel cover from the burner flange, and wherein the burner flange is configured to mount the combustion can.

8. The full premix burner of claim 7, wherein the heat insulation pad comprises an outer ring, an inner ring and a plurality of connecting strips connecting the outer ring and the inner ring, wherein each connecting strip is uniformly distributed and forms a plurality of annular holes with the outer ring and the inner ring.

9. The full premix burner of claim 7, wherein the burner flange comprises a plate body and a boss, the plate body is used for compressing the splitter plate and the heat insulation pad, and the boss is used for collecting the mixed gas flowing out of the splitter hole.

10. A full premix gas heating water heater comprising a full premix burner as in any one of claims 1-9.

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