CN206755164U - Burner assembly and there is its gas heater - Google Patents

Abstract

The utility model discloses a kind of burner assembly and there is its gas heater, the burner assembly includes：Exhaust fume collecting hood；Gas mixing passage, gas mixing passage includes first gas import and second gas import, one is passed through combustion gas and another is passed through combustion-supporting gas in first gas import and second gas import, the outgassing direction of first air inlet import and the outgassing direction of second gas import are intersecting or relative, and the outlet of gas mixing passage connects with exhaust fume collecting hood；Net is distributed, distribution net is located in gas mixing passage and positioned at the downstream of first gas import and second gas import；Catalytic combustion system, catalytic combustion system are located in exhaust fume collecting hood, and catalytic combustion system is relative with the outlet of gas mixing passage；Heater, heater are used to preheat catalytic combustion system.According to burner assembly of the present utility model and there is its gas heater, burning is abundant, and the discharge capacity of carbon monoxide and nitrogen oxides is few, has the characteristics that to clean, be efficient, environmentally friendly.

Description

Burner assembly and there is its gas heater

Technical field

Water heater arrangement technical field is the utility model is related to, more particularly, to a kind of burner assembly and there is it Gas heater.

Background technology

At present, water heater turns into household electrical appliance common in daily life.In the related art, the burning side of water heater Formula is flaming combustion, and combustion gas and air are not pre-mixed in burner, and it is sent into combustion chamber respectively, is fired in mixing Burn, flame caused by burning is longer, has the profile of distinctness, because activation energy is higher, burning velocity is slow, incomplete combustion, causes The thermal efficiency of burning declines, and the gas radiation amount of flaming combustion flame is smaller, using heat convection as main heat transfer type, energy profit It is low with rate.In addition, under flaming combustion mode, due to the different parts of burning and the difference of air contact, cause the complete of burning Degree and temperature are also different, and in high-temperature region, temperature is higher, the pollution such as oxygen and nitrogen reaction generation nitrogen oxides in air Thing, in low-temperature space, incomplete combustion, the harmful substances such as carbon monoxide, hydrocarbon and tar can be produced.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model carries Go out a kind of burner assembly, the carbon monoxide and nitrogen oxide emission of the burner assembly are low, have efficiently, energy-conservation, ring The features such as guarantor.

The utility model also proposes a kind of gas heater with the burner assembly.

When flaming combustion in correlation technique is in relatively low thermal power operating mode, the flame temperature in combustion chamber is relatively low, if Increase air coefficient, can both flame temperature is further reduced, almost nitrogenfree oxide produces, and can increase oxygen concentration again The burning of big fuel is more thorough, and then the discharge capacity very little of carbon monoxide, but when flaming combustion is in higher calorific power, increase Air coefficient has been not enough to produce above-mentioned beneficial effect.Although the non flame combustion mode in correlation technique can change to a certain extent The discharge capacity of carbon monoxide and nitrogen oxides under kind higher calorific power operating mode, combustion process can not still realize the zero-emission of nitrogen oxides Put.

Included according to the burner assembly of the utility model first aspect：Exhaust fume collecting hood；Gas mixing passage, the gas mix Closing passage includes first gas import and second gas import, and one in the first gas import and the second gas import It is individual be used for be passed through combustion gas and another be used for be passed through combustion-supporting gas, the outgassing direction of the first air inlet import and second gas The outgassing direction of body import is intersecting or relative, and the outlet of the gas mixing passage connects with the exhaust fume collecting hood；Net is distributed, it is described Distribution net is located in the gas mixing passage and positioned at the downstream of the first gas import and the second gas import；Urge Change burner, the catalytic combustion system is located in the exhaust fume collecting hood, and the catalytic combustion system and the gas mixing The outlet of passage is relative；Heater, the heater are used to preheat the catalytic combustion system.

According to burner assembly of the present utility model, catalytic combustion system is preheated by heater so that urge After change burner reaches initiation temperature, from flaming combustion to catalysis burning (flameless combustion) transition, and then meet burner group Part burns fully under different power operating modes, and the discharge capacity of carbon monoxide and nitrogen oxides is few, has cleaning, efficient, environmental protection The features such as.

According to the utility model one embodiment, the gas mixing passage includes：First air inlet pipe, first air inlet One end of pipe is formed as the first gas import of the gas mixing passage and the other end is formed as the gas mixing passage Outlet, first gas can be entered in gas mixing passage by first gas import, and be discharged by exporting.

According to one further example of the utility model, the part in first air inlet pipe outside the exhaust fume collecting hood Side wall on formed with the second gas import.

According to one example alternatively of the utility model, the gas mixing passage also includes the second air inlet pipe, described Second air inlet pipe is stretched into first air inlet pipe and stretched into the entrance of first air inlet pipe, second air inlet pipe Formed with one or spaced apart multiple second gas imports in the side wall of the part of first air inlet pipe.

Further, entrance of the second gas import in second air inlet pipe towards first air inlet pipe.

According to one alternative embodiment of the utility model, the heater includes：Flaming combustion device, the flaming combustion At least a portion of device is located in the gas mixing passage, and flaming combustion device the going out adjacent to the gas mixing passage Mouth is used to heat the catalytic combustion system；Igniter, the igniter are used to have to described adjacent to the flaming combustion device Flame burner is lighted a fire, and so, facilitates heater to preheat catalytic combustion system.

According to another alternative embodiment of the utility model, the catalytic combustion system includes：Cover body, the cover body are located at In the exhaust fume collecting hood and relative to the gas mixing passage outlet into the shape of back-off, and at least a portion of the cover body It is spaced apart with the bottom surface in the exhaust fume collecting hood；Catalyst converter, the catalyst converter are located in the cover body, and are led to the gas mixing The outlet in road is relative, and the gas come out by air-flow hybrid channel flows through catalyst converter, and cover body can make air accumulation and then ensure to urge It is more abundant to change burning.

Alternatively, the catalyst converter includes：Matrix；Catalyst, the catalyst converter are bonded on the matrix, the catalysis The carrier of device is modified aluminas, and the active component of the catalyst converter is at least one of platinum and Pa, and the catalyst helps Agent is at least one of aluminum oxide and iron oxide.

Further, described matrix is metal otter board, ceramic honey comb or foam silicon carbide ceramics.

Alternatively, the outlet of the gas mixing passage is stretched into the cover body, at least a portion of the catalyst converter with The outlet of the gas mixing passage is relatively or the catalyst converter is located at the extension of outlet or the outlet of the gas mixing passage Inner side.

Included according to the gas heater of the utility model second aspect：Burner assembly, the burner assembly are root According to the burner assembly described in above-described embodiment；Heat exchanger tube, the heat exchanger tube are coiled in the exhaust fume collecting hood of the burner assembly On.

According to gas heater of the present utility model, by using according to the utility model first aspect embodiment Burner assembly, have the advantages that carbon monoxide and nitrogen oxide emission are few, clean, be efficient, environmentally friendly.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the schematic diagram according to the burner of the utility model embodiment；

Fig. 2 is the schematic diagram according to the burner of the utility model another embodiment；

Fig. 3 is the schematic diagram according to the gas heater of the utility model embodiment.

Reference：

100：Burner assembly；

10：Exhaust fume collecting hood；

20：Gas mixing passage；20a：The outlet of gas mixing passage；

21：First air inlet pipe；21a：First gas import；

22：Second air inlet pipe；22a：Second gas import；

30：Distribute net；

40：Catalytic combustion system；

41：Cover body；

42：Catalyst converter；421：Matrix；422：Catalyst；

50：Heater；51：Flaming combustion device；52：Igniter；

200：Heat exchanger tube.

300：Blower fan.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " " center ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axial direction ", " radial direction ", The orientation or position relationship of instructions such as " circumferences " are based on orientation shown in the drawings or position relationship, are for only for ease of description originally Utility model and simplifying describes, rather than instruction or implies that signified device or element must have specific orientation, with specific Azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, define " first ", " second " One or more this feature can be expressed or be implicitly included to feature.In description of the present utility model, unless otherwise Illustrate, " multiple " are meant that two or more.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

Burner assembly 100 according to the utility model first aspect embodiment is described below.

As shown in figure 1, exhaust fume collecting hood 10 is included according to the burner assembly 100 of the utility model embodiment, gas mixing is led to Road 20, distribution net 30, catalytic combustion system 40 and heater 50.

There is first gas import 21a and second gas import 22a, first gas import 21a on gas mixing passage 20 Available for combustion gas is passed through, second gas import 22a can be used for being passed through combustion-supporting gas, or first gas import 21a is used to be passed through Combustion-supporting gas, second gas import 22a are used to be passed through combustion gas, first gas import 21a outgassing direction and going out for second gas Gas direction is intersecting or relative, and the outlet 20a of gas mixing passage is connected with exhaust fume collecting hood 10, the gas in gas mixing passage 20 Body can be discharged into exhaust fume collecting hood 10 by outlet.

Distribution net 30 is located in gas mixing passage 20, and distributes net 30 and be arranged on first gas import 21a and the second gas Body import 22a downstream, catalytic combustion system 40 are located in exhaust fume collecting hood 10, and with the outlet 20a of gas mixing passage just phase Right, distribution net 30 can be evenly distributed combustion gas and combustion-supporting gas, and the gas after being sufficiently mixed flow to catalysis burning dress Put at 40, then catalytic combustion system 40 is preheated by heater 50, when the further rise of temperature reaches predetermined temperature, Catalytic combustion system 40 can realize abundant burning, and the discharge capacity of carbon monoxide and nitrogen oxides is few in combustion process, with biography The combustion system of system is compared, and not only increases the utilization rate to fuel, and discharge of poisonous waste amount is few.

Thus, combustion gas and combustion-supporting gas are mixed by first gas import 21a and second gas import 22a into gas respectively Close in passage 20, and combustion gas mixes with combustion-supporting gas part, then combustion gas and combustion-supporting gas is carried out by distribution net 30 uniform Mixing, the gas after being sufficiently mixed are reached at catalytic combustion system 40 by exporting to, are preheating in catalytic combustion system 40 predetermined Flameless combustion can be carried out after temperature, directly through catalytic combustion system 40 flameless combustion occurs for mixed gas, so as in difference Power operating mode under realize clean combustion.

By the way of such a catalysis burning, combustible burns in the presence of catalytic combustion system 40, with correlation technique In combustion system compare, be catalyzed that the temperature of burning is relatively low, can effectively suppress the generation of nitrogen oxides, while be catalyzed burning Compare reduces the content of carbon monoxide in flue gas completely.

According to the burner assembly 100 of the utility model embodiment, by using the mode of catalysis burning, in high power Flameless combustion is switched to, realizes and can fully be burnt in each stage of combustion process, the discharge of carbon monoxide and nitrogen oxides Amount is few, has the characteristics that to clean, be efficient, environmentally friendly.

According to one embodiment of the present utility model, gas mixing passage 20 includes the first air inlet pipe 21, in the first air inlet One end of pipe 21 has first gas import 21a, and the other end has the outlet 20a of gas mixing passage.Pass through the first air inlet pipe 21 form gas channel.

In addition, the second gas import 22a in the application can be arranged to many different forms, it is only necessary to by the first gas Body import 21a outgassing direction is arranged to intersect or relative with second gas import 22a outgassing direction.

Wherein, first gas import 21a outgassing direction is relative with second gas import 22a outgassing direction or intersects, Refer to, the air-flow entered by first gas import 21a can be formed with the second gas import 22a air-flows entered and mutually rushed The form of mixing, such as relative two strands of air-flows liquidate, or the inclination of two strands of intersecting air-flows is symmetrical, entered so as to realize Gas in gas mixing passage 20 can liquidate mixing, improve the mixing efficiency and uniformity coefficient of combustion gas and combustion-supporting gas.

Some realization " first gas import 21a outgassing directions and the second gas of the utility model embodiment are described below Body import 22a outgassing direction is arranged to intersecting or relative " structure.

Wherein, as shown in Fig. 2 second gas import 22a can be arranged at the first air inlet pipe 21 outside exhaust fume collecting hood 10 In side wall, and set positioned at neighbouring first gas import 21a position.Because second gas import 22a is set and the first air inlet In the side wall of pipe 21, therefore, the gas that second gas import 22a enters will necessarily enter with the air-flow passed through in the first air inlet pipe 21 Row impingement mix.

It is of course also possible to second gas import 22a direction is rationally set, by second gas import 22a side To being arranged perpendicular to the first air inlet pipe 21 or with the first air inlet pipe 21 in the predetermined angle handed over.

As shown in figure 1, the utility model additionally provides another structure for facilitating combustion gas to be mixed with combustion-supporting gas.It is specific and Speech, gas mixing passage 20 also include the second air inlet pipe 22, and the second air inlet pipe 22 is set close to the entrance of the first air inlet pipe 21, the Two air inlet pipe 22 stretch into the inside of the first air inlet pipe 21, and in the side for the part that the second air inlet pipe 22 is stretched into the first air inlet pipe 21 There is second gas import 22a, second gas import 22a quantity can be selected reasonably, for example, the second air inlet on wall Pipe 22, which stretches into, has a second gas import 22a in the side wall of the part in the first air inlet pipe 21, or the second air inlet pipe 22 In the side wall for the part stretched into the first air inlet pipe 21 there is compartment of terrain to be placed with multiple second gas import 22a, the second air inlet The entrance of second gas import 22a the first air inlet pipe 21 of direction on pipe 22, so, for example, combustion-supporting gas can pass through first The first gas entrance of air inlet pipe 21 enters, and combustion gas is entered by the second gas import 22a in the second air inlet pipe 22 into first Tracheae 21, now tentatively mixed with the flowing of combustion gas using combustion-supporting gas.

Wherein, second gas import 22a includes but is not limited to towards the entrance of the first air inlet pipe 21：Second gas import 22a angles opposite or in predetermined angular with the airintake direction of the first air inlet pipe 21.

According to another embodiment of the present utility model, heater 50 is mainly by 52 groups of flaming combustion device 51 and igniter Into at least a portion of flaming combustion device 51 is located in gas mixing passage 20, and flaming combustion device 51 leads to close to gas mixing The outlet 20a in road is set, and igniter 52 is arranged close to flaming combustion device 51, and flaming combustion device 51 can be lighted a fire so that Flaming combustion device 51 carries out flaming combustion, and catalytic combustion system 40 is heated with realizing.

That is, the preheating to catalysis burning is realized by way of flaming combustion.

Specifically, the flaming combustion heatable catalytic burner 40 first under low-power, makes catalysis burn in the short time Device 40 reaches initiation temperature, then stops flaming combustion, such as can improve by of short duration cut-out combustion gas or directly fuel/sky Oxygen mixture flow velocity makes the de- fire of flaming combustion.

Certainly, the method that the utility model preheats to catalytic combustion system 40 has many kinds, such as can also pass through heating Pipe preheats etc. to catalytic combustion system 40.

According to further embodiment of the present utility model, as shown in figure 1, catalytic combustion system 40 mainly includes the He of cover body 41 Catalyst converter 42, cover body 41 are located in exhaust fume collecting hood 10, and cover body 41 is distributed relative to the outlet 20a back-off shapes of gas mixing passage, And the end (lower end in Fig. 1) of cover body 41 is spaced apart setting with the inner bottom surface of exhaust fume collecting hood 10.Catalyst converter 42 is similarly positioned in collection cigarette Cover in 10 cover bodies 41, catalyst converter 42 is relative with the outlet 20a of gas mixing passage, and so preliminary mixed gas passes through gas The outlet 20a of hybrid channel flows through catalyst converter 42, and the cover body 41 above catalyst converter 42 can cause air accumulation fully to fire Burning, the gas after burning is flowed out by the end of cover body 41,.

It will be appreciated by persons skilled in the art that outlet flue is provided with exhaust fume collecting hood 10, as shown in figure 1, this practicality is new Outlet flue in type sets the top with exhaust fume collecting hood 10, and flue gas will discharge from outlet flue after the completion of burning.

Further, catalyst converter 42 is mainly made up of matrix 421 and catalyst 422, it is preferable that matrix 421 uses metal Web plate, ceramic honey comb or foam silicon carbide ceramics are made.Catalyst 422 is bonded with matrix 421, by catalyst 422 It is made with bonding agent after slurries coated on matrix 421.

Wherein it is preferred to the carrier of catalyst 422 uses modified aluminas, the active component of catalyst 422 using platinum and At least one of Pa, the auxiliary agent of catalyst 422 use at least one of aluminum oxide and iron oxide, and catalyst 422 is by adopting With above-mentioned material, be advantageous to that catalysis burning occurs after predetermined initiation temperature is reached.

Alternatively, the outlet 20a of gas mixing passage is stretched into cover body 41, and at least a portion and the gas of catalyst converter 42 mix It is relative to close the outlet 20a of passage, either catalyst converter 42 is located exactly at the outlet 20a of gas mixing passage or catalyst converter 42 Positioned at the inner side that the outlet 20a of gas mixing passage extends, be so advantageous to by the gas of the outlet 20a outflows of gas mixing passage Body flows through catalyst converter 42 and catalysis burning occurs, and ensures the adequacy of burning.

In order to realize the purpose of smokeless emission itself, the ratio of combustion gas and combustion-supporting gas is entered in the preferred scheme of the application Some researchs are gone, for example, the model of the methane being passed through in combustion gas and the ratio of oxygen that is passed through in combustion-supporting gas 1/2 to 1/3 In enclosing；Preferably, model of the ratio of the methane being passed through in combustion gas and the oxygen being passed through in combustion-supporting gas 1/2.18 to 1/2.24 In enclosing.

It is air typically by first gas import 21a or second gas import the 22a combustion-supporting gas being passed through, therefore, this The methane that is passed through in utility model in combustion gas and the ratio of combustion-supporting gas (air) is passed through in the range of 1/8 to 1/12, preferably Ground is in the range of 1/10.3 to 1/10.6.

Outstanding advantages in the utility model are that the discharge capacity of nitrogen oxides and carbon monoxide is few in combustion process.

Specifically, test data of experiment is as shown in the table, such as in the range of 20-50L/min methane flow rates, adjusts direct current wind The input voltage of machine 300, control flue gas in oxygen content 6.3% or so, you can realize zero-emission and an oxygen for nitrogen oxides Change the low emission of carbon.

In addition to data shown in upper table, following experimental phenomena can also be drawn：

1. nitrogen oxides can realize zero-emission, such as 4.7%-7.8% in the range of broader oxygen content；

2. the discharge value of carbon monoxide and the premix situation of fuel/air mixture are in obvious positive correlation, it is pre- further to improve gas Mixed situation, the discharge capacity of carbon monoxide constantly reduce；

3. can be power output by the product of the voltage and current of dc source, and then judge the air output of blower fan 300.

The burner assembly 100 according to one specific embodiment of the utility model is specifically described with reference to Fig. 1-3.

As shown in figure 1, burner assembly 100 includes exhaust fume collecting hood 10, gas mixing passage 20, distribution net 30, catalysis burning Device 40, heater 50 and controller.

Gas mixing passage 20 includes the first air inlet pipe 21 and the second air inlet pipe 22, and one end of the first air inlet pipe 21 is first Gas feed 21a, the other end be gas mixing passage outlet 20a, radial direction of second air inlet pipe 22 along the first air inlet pipe 21 Inserted by the side wall of the first air inlet pipe 21 in the first air inlet pipe 21, and the second air inlet pipe 22 is set adjacent to the entrance of the first air inlet pipe 21 Put, there are multiple second gas being intervally arranged in the lower wall for stretching into the second air inlet pipe of part 22 in the first air inlet pipe 21 Entrance 22a.

Distribution net 30 and heater 50 are located in air-flow hybrid channel 20, and distribution net 30 is located at the upper of the second air inlet pipe 22 Side, for heater 50 positioned at the top of distribution net 30, heater 50 includes flame burner 51 and igniter 52, catalysis burning The outlet 20a that device 40 can be located at air-flow hybrid channel is outer and relative with the outlet of air-flow hybrid channel 20 (as shown in Figure 1), The inner side (as shown in Figure 2) of the outlet 20a extensions of air-flow hybrid channel can also be located at, it is logical that air-flow mixing can also be located at At the outlet 20a in road (as shown in Figure 3).

Catalytic combustion system 40 includes cover body 41 and catalyst converter 42, wherein, cover body 41 is formed as the lid of back-off, is located at On catalyst converter 42, catalyst converter 42 is mainly made up of matrix 421 and catalyst 422, after catalyst 422 and bonding agent are made into slurries Coated on matrix 421, matrix 421 uses foam silicon carbide ceramics, and 1500 DEG C of heatproof, intensity are high, can carry out naked light burning.

Controller is according to the temperature of setting, there is provided signal fan 300 and gas valve body (not shown), passes through the first air inlet Pipe 21 provides air (as shown in dotted arrow at first gas import 21a in Fig. 1), and the second air inlet pipe 22 provides combustion gas (such as Fig. 1 At middle second gas import 22a shown in solid arrow), further it is well mixed through undue distribution 30 after combustion gas and air mixing, Then enter flaming combustion device 51 (as shown in the double dashed arrow in Fig. 1 in air-flow hybrid channel 20), controller provides simultaneously Signal is burnt to igniter 52, flaming combustion device 51, and preheats catalytic combustion system 40, when urging for catalytic combustion system 40 After the temperature of change device 42 reaches initiation temperature, controller can control blower fan 300 and gas valve body, adjust air-flow so that have flame Burning is extinguished, and only carries out catalysis burning, and air-flow passes through the cover body 41 of catalytic combustion system 40, after changing direction so that air-flow is past Both sides are flowed (as shown in double solid line arrow in exhaust fume collecting hood 10 in Fig. 1), and catalyst converter 42 gives full play to effect.

Catalysis burning belongs to self-sustaining reaction, as long as when temperature reaches more than 700 DEG C, and have gas/air supply, catalysis Burning can just continue to carry out, and combustion noise is less than 48dB, while security is higher, and oxygen acclimatization concentration range is big, and burning relaxes.

Gas heater according to the utility model second aspect embodiment is described below.

According to the gas heater of the utility model embodiment mainly by 200 groups of the burner assembly 100 and heat exchanger tube Into the bending of heat exchanger tube 200 is coiled on the exhaust fume collecting hood 10 of burner assembly 100, enters cold water by one end of heat exchanger tube 200, is passed through Cross and become hot water with the generation of the exhaust fume collecting hood of burner assembly 100 10 heat exchange, flowed out finally by the other end, to facilitate user Use.

According to the gas heater of the utility model embodiment, by using the burner assembly of the utility model embodiment 100, have the advantages that efficiently, it is energy-saving and environmental protection, safe to use.

The gas heater according to one specific embodiment of the utility model is specifically described with reference to Fig. 3.

As shown in figure 3, the gas heater of the utility model embodiment includes blower fan 300, the and of the burner assembly 100 Heat exchanger tube 200.

Cold water is entered in heat exchanger tube 200 by one end of heat exchanger tube 200, and blower fan 300 is that burner assembly 100 provides air, Entering via the first air inlet pipe 21 in burner assembly 100, combustion gas enters in burner assembly 100 via the second air inlet pipe 22, Air-flow after burning is flowed by the cover body 41 of catalytic combustion system 40 to both sides, is flowed from the lower end of exhaust fume collecting hood 10 to upper end, The heat exchanger tube 200 coiled with the outside of exhaust fume collecting hood 10 carries out heat exchange, heats the water in heat exchanger tube 200, passes through heat exchanger tube 200 Other end outflow, with for users to use, while flue gas is drained into air by the upper end of exhaust fume collecting hood 10.

According to the gas heater of the utility model embodiment, by using the burner assembly of the utility model embodiment 100, have the advantages that efficiently, it is energy-saving and environmental protection, safe to use.

According to the burner assembly 100 of the utility model embodiment and with its gas heater other form and Operation is all for those of ordinary skills known, is not detailed herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe Structure, material or feature are contained at least one embodiment or example of the present utility model.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or Person's feature can combine in an appropriate manner in any one or more embodiments or example.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle and objective of the present utility model, replaced And modification, the scope of the utility model are limited by claim and its equivalent.

Claims (11)

1. A kind of 1. burner assembly, it is characterised in that including：

   Exhaust fume collecting hood；

   Gas mixing passage, the gas mixing passage include first gas import and second gas import, the first gas One in import and the second gas import is used to be passed through combustion gas and another is used to be passed through combustion-supporting gas, first gas The outgassing direction of body import and the outgassing direction of the second gas import are intersecting or relative, the outlet of the gas mixing passage Connected with the exhaust fume collecting hood；

   Net is distributed, the distribution net is located in the gas mixing passage and is located at the first gas import and second gas The downstream of body import；

   Catalytic combustion system, the catalytic combustion system are located in the exhaust fume collecting hood, and the catalytic combustion system and the gas The outlet of body hybrid channel is relative；

   Heater, the heater are used to preheat the catalytic combustion system.
2. 2. burner assembly according to claim 1, it is characterised in that the gas mixing passage includes：

   First air inlet pipe, one end of first air inlet pipe be formed as the first gas import of the gas mixing passage and The other end is formed as the outlet of the gas mixing passage.
3. 3. burner assembly according to claim 2, it is characterised in that be located at the exhaust fume collecting hood in first air inlet pipe Formed with the second gas import in the side wall of outer part.
4. 4. burner assembly according to claim 2, it is characterised in that the gas mixing passage also includes the second air inlet Pipe, second air inlet pipe are stretched into first air inlet pipe and adjacent to the entrance of first air inlet pipe, second air inlet Stretched into pipe in the side wall of the part of first air inlet pipe formed with one or spaced apart multiple second gas are entered Mouthful.
5. 5. burner assembly according to claim 4, it is characterised in that the second gas in second air inlet pipe Entrance of the import towards first air inlet pipe.
6. 6. according to the burner assembly any one of claim 1-5, it is characterised in that the heater includes：

   Flaming combustion device, at least a portion of the flaming combustion device are located in the gas mixing passage, and described have flame combustion Burner is used to heat the catalytic combustion system adjacent to the outlet of the gas mixing passage；

   Igniter, the igniter are used to light a fire to the flaming combustion device adjacent to the flaming combustion device.
7. 7. according to the burner assembly any one of claim 1-5, it is characterised in that the catalytic combustion system bag Include：

   Cover body, the cover body be located in the exhaust fume collecting hood and relative to the gas mixing passage outlet into back-off shape, And at least a portion of the cover body is spaced apart with the bottom surface in the exhaust fume collecting hood；

   Catalyst converter, the catalyst converter are located in the cover body, and relative with the outlet of the gas mixing passage.
8. 8. burner assembly according to claim 7, it is characterised in that the catalyst converter includes：

   Matrix；

   Catalyst, on the matrix, the carrier of the catalyst converter is modified aluminas to catalyst converter bonding, the catalyst converter Active component be at least one of platinum and palladium, the auxiliary agent of the catalyst is at least one of aluminum oxide and iron oxide.
9. 9. burner assembly according to claim 8, it is characterised in that described matrix be metal otter board, ceramic honey comb or Foam silicon carbide ceramics.
10. 10. burner assembly according to claim 7, it is characterised in that institute is stretched into the outlet of the gas mixing passage State in cover body, at least a portion of the catalyst converter is relative with the outlet of the gas mixing passage or the catalyst converter is located at institute State the inner side of the extension of outlet or the outlet of gas mixing passage.
11. A kind of 11. gas heater, it is characterised in that including：

    Burner assembly, the burner assembly are the burner assembly according to any one of claim 1-10；

    Heat exchanger tube, the heat exchanger tube are coiled on the exhaust fume collecting hood of the burner assembly.