CN1014628B - Combustion apparatus with atomizer, and method of controlling same - Google Patents

Abstract

A combustion device of the invention comprises an atomization device atomizing the fuel; a spray chamber of the gas mixture which is formed by the mixture of the fuel atomized by the atomization device with the air, and the gas mixture flows downward towards an opening of the lower end of the spray chamber; a bellow enclosing the lower part of the spray chamber and forming a combustion space with the spray chamber and a plurality of gas supply holes which positioned on the bellow and faced ton the lower part of the spray chamber. The invention has simple structure and can perform instantaneous ignition on the fuel spray produced by the atomization device and the gas mixture of foreign gas, decrease the odour produced during igniting or putting out the fire greatly and get higher regulating ratio.

Description

Combustion apparatus with atomizer, and method of controlling same

The present invention relates to burner and control method thereof with atomising device.This device is suitable for as the burner as air-heater, boiler, water heater, drying machine or gas turbine etc.

Be used for the burner on heating system such as various oil burners, air-heater or the various drying machine, be arranged on usually in the building that office or family etc. are used to live, therefore adopt variously to prevent that the living space from polluting or the measures of foul smell.For example, heating means such as heater are set on burner, make the outside fuel gasification of supplying with.And in this method, fuel is gasified needs some times (need 30～40 seconds at least, need 2～3 minutes at most), and therefore igniting is also with regard to some times of significant need.

In order to address this problem, the method that shortens the duration of ignition with the formation speed of accelerating gasifying gas in the combustion chamber, to have proposed all schemes headed by the applicant, the supersonic atomizer of for example being made up of high-frequency generator, electricity/sound conversion element, ultrasonic oscillator sound collector etc. promptly is set in the bottom, combustion chamber, by driving this supersonic atomizer, make the fuel atomization of supplying with the combustion chamber, become very trickle spray flow, quickened the formation speed of gasifying gas in the combustion chamber, to shorten the duration of ignition.

When the above-mentioned existing burner that supersonic atomizer is set in the bottom, combustion chamber was tested, shortened significantly than combustion chamber before the duration of ignition that discovery is provided with the bottom, combustion chamber (being vaporizer) of supersonic atomizer really.But the flame that takes place at above-mentioned vaporizer will move the combustion chamber from vaporizer toward top, forms normal flame there.Therefore, begin formation, need the some time (10～30 seconds), before forming this normal flame, can produce some foul smell or coal gas to normal flame from igniting at vaporizer.In addition, the burner of the burner of above-mentioned band supersonic atomizer self complex structure, and the adjusting of representing its quantity combusted adjustable range size can only be set in 2: 1 the scope that is approximately than the ratio of minimum quantity combusted (the expression maximum combustion amount with).

The burner of band atomising device can be suitable for as being called linearly, and the whole burner that slightly is rectangular shape helps the thin typeization of device, still, exists the problem that blue flame can not be kept in the flame hole end.

In addition, in the burner of before band atomising device, also exist such problem, promptly when low temperature, under the situation of ignition lag, drop is attached on the vaporizer wall, and the back that gathers together is just toward dirty, drop on and block airport on the burner plate, produce yellow long flame etc., make burning disorderly, thereby can not obtain stable burning.

And, in the burner before its combustion space only in both sides or a side form, therefore, just have to make burner to maximize in order to enlarge the combustion space.

Moreover, when it is used for so-called linear integral body and slightly is the burner of rectangular shape, because the combustion space is longilineal, spray chamber's sidewall is subjected to the combustion heat and expands, and causes spray chamber's distortion, and the result causes the flame distribution disorder, it is inhomogeneous to burn, and produces bad phenomenon such as flourishing.

Because the combustion space is elongated, inhomogeneous from the air that is located at the air supply hole ejection on the bellows at entrance side and inboard, also make the flame distribution disorder, it is inhomogeneous to burn, and produces flourishingly etc., also has such problem simultaneously: promptly, when normal combustion, when 2 air mass flows were not enough, unburned gas fuel was back in 2 air wind channels, becomes tar and separates out.

Again, when in burner before, putting out a fire, be provided to a part of fuel of fuel feed pipe end, by thermal expansion with add the surface tension of thermosetting, viscosity reduces after petrolift stops the several seconds, because this tube end faces the oscillator sound collector in atomising device, this part fuel drips in the spray chamber by the oscillator sound collector, (burning then) produces imperfect combustion, generated coal gas, become unburned gas and discharge, become tarry attached on the oscillator sound collector, reduce fuel atomizing efficient, also become the reason that foul smell produces.

In addition, the temperature in the uniformity of flame distribution, spray chamber rises or some problems are also being left in the aspects such as discharge characteristic during imperfect combustion.

The purpose of this invention is to provide a kind of fuel-device and control method thereof with atomising device.This device can solve the above problems, and with simpler structure, finishes the atomized fuel that generates in atomising device and the gaseous mixture of external gas are carried out instantaneous ignition; The foul smell that takes place in the time of reducing when igniting and fire extinguishing significantly; Can obtain the high ratio of regulating.

For this reason, the feature of the burner of band atomising device of the present invention is that it includes: the atomising device that makes fuel atomization; The fuel of this atomising device atomizing is mixed with air, form gaseous mixture, and make this gaseous mixture spray chamber that flow in open-ended place towards the spray chamber downwards; Surround above-mentioned spray chamber the bottom and and the spray chamber between form the bellows of combustion space and be located at some air supply holes on the bellows, these holes are facing to the peristome and the bottom of above-mentioned spray chamber.

The feature of the control method of the burner of band atomising device of the present invention is, in by the burner that carries out the band atomising device that air supplies with for 3 air that form 1 air that above-mentioned gaseous mixture supplies with, supply with 2 air of above-mentioned spray chamber opening part and supply with bottom, above-mentioned spray chamber, switch 1 air capacity and 2 air capacities according to fired state.

Therefore, the present invention is being used for so-called linearly, whole when slightly being the burner of rectangular shape, can help the thin typeization of device greatly, and, make whole flames of generation be uniform blue flame at length direction.

And, even when low temperature (for example below freezing), also can prevent situations such as firing delay, tangible foul smell generation, thereby obtain stable initiation combustion state.

Also have,, absorb the thermal expansion of spray chamber's sidewall, prevented the distortion of spray chamber's sidewall by preventing the thermal deformation of spray chamber, make gasifying gas mobile keep stable.

By the spray chamber being forced cooling, prevent the indoor overheating of spraying, prevent tempering, can make flameholding, prevent the high-temperature oxydation of spray chamber's sidewall simultaneously, improve service life.

With simple structure 2 air spray volumes that come out from 2 airports are kept evenly, burning is also carried out equably, and flame distribution keeps certain state.In addition, in the wind channel of 2 air, keep malleation, so just can prevent the backflow of unburned gas.

In when fire extinguishing, can instantaneous turning back in the fuel tank at the fuel of fuel feed pipe end, thereby can not only prevent from the delayed combustion of fuel to improve extinguishing property, and also the time started that can make burning next time is in advance.

In addition and since constriction the exit passageway of spray chamber, thereby can promote mixing of air and fuel, make flame distribution be tending towards even.

Below be to brief description of drawings.

Fig. 1 is an embodiment sectional drawing of the burner of expression band atomising device of the present invention.

Fig. 2 is vertical sectional drawing of Fig. 1.

Fig. 3 is an explanation fired state schematic diagram.

Fig. 4～Fig. 6 is the graph of a relation of 1 time, 2 times, 3 times air capacities of expression and fired state.

Fig. 7 is the graph of a relation of expression smog time of origin and 2 air mass flows.

Fig. 8 is the sectional drawing of other embodiment of expression the present invention.

Fig. 9 is the sectional drawing of expression another embodiment of the present invention.

Figure 10 is the sectional drawing along X-X line among Fig. 9.

Figure 11 is the timing chart of key diagram 9, Figure 10 embodiment action.

Figure 12 is the sectional drawing of expression oscillator sound collector configuration example.

Figure 13 is an embodiment of the burner control mode of expression band atomising device of the present invention.

Figure 14 is the timing chart of expression explanation the present invention action.

Figure 15 is the graph of a relation of 1 time, 2 times air register switching times of expression and 1 air capacity ratio.

Figure 16 is the explanation control flow chart.

Figure 17 (a) is the plane of expression air supply hole configuration example, and Figure 17 (b) is the figure of its problem points of explanation.

Figure 18 is the plane of the expression air supply hole configuration example relevant with the present invention.

Figure 19 is the sectional drawing of another embodiment of expression the present invention.

Figure 20, Figure 21 are the figure of the spray chamber that changes form of expression.

Figure 22 is the figure of the combustion space that changes form of expression.

Figure 23, Figure 24 and Figure 25 are the figure of the spray chamber that changes form of expression.

Figure 26, Figure 27 are the sectional drawings of 2 air wind channels changing form of expression.

Figure 28 is the schematic diagram of combustion supply system.

Figure 29 to Figure 34 is the figure of the different shape of expression spray chamber.

Figure 35 to Figure 42 is the figure of different shape that expression has the spray chamber of auxiliary air wind channel.

Below, with reference to the description of drawings embodiments of the invention.

Fig. 1 and Fig. 2 represent an embodiment of the burner of band atomising device of the present invention.It is a kind of burner linear, that integral body is rectangular shape that is called, and the atomising device of employing is a supersonic atomizer.Its is substantially by the 1st chamber spray chamber 1, the 2 chamber bellows 2, supersonic atomizer 5, constitute as the igniter 7 of igniter with the wind channel 19 that external gas imports above-mentioned spray chamber 1 and bellows 2 respectively.

In spray chamber 1, the micronize fuel that generates by the ultrasonic vibration of above-mentioned supersonic atomizer 5 and 1 air by above-mentioned wind channel 19 importings (promptly refer to above-mentioned micronize fuel between form give the mixed necessary air of gas) mix.The shape of spray chamber 1 along the above-mentioned gaseous mixture downstream constriction gradually of direction that flows, and forms roughly V font, and its end forms gives fixed peristome 6, near this peristome 6, has disposed the igniting portion (Fig. 2) of above-mentioned igniter 7.

Constitute the top of the ultrasonic nozzle 5a of supersonic atomizer 5 facing to above-mentioned spray chamber 1.As shown in Figure 2, this ultrasonic nozzle 5a is communicated with spray chamber 1, is communicated with 1 the air wind channel 11 that flows out from 19 of above-mentioned wind channels by a minimum peristome simultaneously.The end is housed on the ultrasonic nozzle 5a to be faced facing to the oscillator sound collector 10 of spray chamber 1 and range of atomized flow that should oscillator sound collector 10 is provided the fuel feed pipe 9 of fuel.As is well known, supersonic atomizer 5 changes the output signal of high-frequency generator 13a into ultrasonic vibration by electricity/sound inverting element 13, fuel in the range of atomized flow of supplying with above-mentioned oscillator sound collector 10 is atomized, oscillator sound collector 10 end shapes in the present embodiment are conical, but are not limited to this form.

As shown in Figure 1, the top of above-mentioned bellows 2 slightly is the character cut in bas-relief shape, and is corresponding with the narrow that slightly is V word shape of above-mentioned spray chamber 1.Form combustion space 15 above the bellows 2 and between the spray chamber 1 at this.The top of bellows 2 is symmetry substantially about the center with the peristome of spray chamber 1,, tilts with steep angle then with the angle of the delaying certain altitude that is inclined upwardly from this bottom.In the bottom of bellows 2,2 times, 3 times air feed path 17a from 19 outflows of above-mentioned wind channel are arranged, 2 air (promptly keeping the combustion air of fired state) and 3 air (promptly continuing the combustion air of normal combustion state) are supplied with bellows 2.

Combustion space when in the present embodiment, being the normal combustion state by the space segment that slightly is the character cut in bas-relief shape 15 that a part surrounded of the upper external face that slightly is the character cut in bas-relief shape of the narrow outside wall surface of spray chamber 1, bellows 2 and illustrated burner lateral compartments.Further describe the part that slightly is the character cut in bas-relief shape of above-mentioned bellows 2, on the part oblique with slow angle lapping, with peristome 6 is that the center left and right symmetrically is established 2 rows 2 airport a, b respectively, above 2 airport a, b placement, on the oblique part of steep angle lapping, be that the center left and right symmetrically is respectively established 3 airport c～f of 4 rows with peristome 6.

In the present embodiment, the aperture of above-mentioned 2 airport a, b is 0.8mm, 16 of the every rows of hole a, and 17 of the every rows of hole b, a, b hole are staggered fork and arrange.The aperture of 3 airport c～f is 1.2mm, 32 of the every rows of hole c, e, and 33 of the every rows of hole d, f are staggered fork equally and arrange.Again, an example is only represented in 2 times above-mentioned airport a, b and aperture, number and the arrangement of 3 airport c～f, can do all changes.

The above-mentioned primary air wind channel 11 that passes through is supplied with 1 air capacity of ultrasonic nozzle 5a, is supplied with above-mentioned 2 air capacities that slightly are character cut in bas-relief shape space segment 15 and supply with the fuel quantity that above-mentioned 3 air capacities that slightly are character cut in bas-relief shape space segment 15 are supplied with according to above-mentioned fuel feed pipe 9 by 3 airport c～f by 2 airport a, b and change.For example, when the fuel quantity of supplying with was 5cc/min, 1 time air capacity was about 1～3NL/min, and 2 times air capacity is about 5～10NL/min, and it is comparatively suitable that 3 air capacities are about 70～80NL/min.

Below, to the fired state of the burner of band atomising device of the present invention, each combustion process when igniting, normal combustion and fire extinguishing describes.

During igniting

When fuel is fed in the atomizing zone of oscillator sound collector 10, promptly its micronize (SMD average diameter 40 μ m) is formed spraying by ultrasonic vibration.Injected fuel spray one side is given with 1 air that flows out from 1 air wind channel 11 and being mixed, and one side is ejected in the spray chamber 1.Injected giving mixed gas and 1 below flowed towards the spray chamber, and by igniter 7 igniting, original air forms high-temperature gas in spray chamber 1.Because in the forming process of high-temperature gas, therefore original air consumption totally can not keep flame for a long time in the spray chamber 1, spray chamber's 1 interior flame (about 0.1 second) has immediately extinguished.

Though flame has extinguished, but because the above-mentioned initial high-temperature gas that burning generated still is trapped in the spray chamber 1, from ultrasonic nozzle 5a continuous injection to the spray chamber a part of injected fuel spray in 1 by the high-temperature gas heating and gasifying, flow to 1 below, spray chamber continuously, near above-mentioned peristome 6, mix mutually with 2 air that flow into by above-mentioned 2 airport a, b, igniter 7 is lighted a fire once more, at this moment, near 2 airport a, b, produce flame, become state shown in Fig. 3 (a).

Then, the part of this flame flows to the top from 2 airport a, b along the space 15 that slightly is the character cut in bas-relief shape, the outside wall surface of heating spray chamber 1, rest parts flows in spray chamber 1, like this, inside and outside all the obtaining of spray chamber 1 heated, and internal temperature further raises, thereby has promoted the gasification of above-mentioned premixed gas.Above-mentioned ultrasonic nozzle 5a comes out gives mixed gas, and from beginning to supply in the spray chamber 1, till the process that the temperature in spray chamber 1 further raises, required time is about 3～4 seconds.

Because the temperature in the spray chamber 1 further raises, and has quickened the gasification of premixed gas, therefore the gas quantity of 1 peristome, 6 ejections also increases gradually from the spray chamber, and the generation of flame is not only limited at 2 airport a, b place, expands to airport c～f in turn 3 times.When flame produced at 3 airport c～f places, the outside wall surface of spray chamber 1 directly was subjected to the heating of flame, and the temperature in the spray chamber 1 sharply rises, and the mixed gas that gives that comes from ultrasonic nozzle 5a is all gasified.Give and mix gas from beginning to supply in the spray chamber 1, to all by about 20 seconds of gasification required time.At this moment, because 1 too much to the gas quantity of 2 airport a, b ejection through peristome 6 from the spray chamber, make the fray-out of flame at 2 airport a, b place, flame is kept by 3 airport c～f, and the stable state of thermotropism is the normal combustion state-transition.

During normal combustion

From when igniting to normal combustion state-transition process, supply with the injected fuel spray of spray chamber 1 and the required heat of premixed gas gasification of 1 air, as previously mentioned, all provide by near the heat of the flame that 3 airports, produces to the outside wall surface heating generation of spray chamber 1.At this moment, 1 air or 2 air directly do not produce flame, but are mixed in the combustion gas that forms in spray chamber 1, and a part that becomes combustion gas is given blending constituent.Owing to mixed into 1 air or 2 air, the above-mentioned flow velocity that gives the combustion gas of the state of mixing increases, and the pressure reduction in the combustion space 15 is increased, thereby improves the stability of blue flame, and keeps the kilter of flame distribution.

The so-called diffused burning that to be flame produce respectively from 3 airport c～f of the basic burning form of normal combustion, (referring to Fig. 3 (b)), therefore, even it is immutable to flow into whole air capacities of burner, near the specified output of combustion outer device, flame produces from 3 times all airport c～f, and along with the minimizing of this burner output, 3 air capacities that produce flame are to reduce in proper order to airport c from airport f.Like this, just the size that quantity combusted in the increase and decrease of 3 airports of flame and the burner takes place can be mapped, can increase substantially the adjusting ratio in the burner before.If quantity delivered that can based on fuel changes the air capacity that flows in the burner, then can obtain bigger adjusting ratio without doubt again.

During fire extinguishing

If stopping the fuel of fuel feed pipe supplies with, then the flame that is taken place by whole 3 airport c～f is at once to extinguish to the order of hole c from hole f, what replace it is to be that 2 airport a, the b position of extinguishing state produces flame, these flames by 2 airport a, b generations enter in the spray chamber 1, with 1 air that flows into through ultrasonic nozzle 5a, with the gas completing combustion that remains in the spray chamber 1.Therefore, the imperfect combustion when having prevented fire extinguishing, thus prevented the foul smell that produces because of imperfect combustion.Again, the fire extinguishing required time began about 3～4 seconds from stopping to supply with fuel.

Fig. 4～Fig. 7 represents that working as quantity combusted is 2300kCal, and 1 air capacity is the 10NL/min(standard liters per minute), 2 air capacities are 1.8NL/min, when 3 times air capacity is 95NL/min, the fired state when only changing one of them condition.As seen from Figure 4,, when this limit is following, take place flourishingly, limit when above, be the fluctuation fired state at this when 1 air capacity during, flame stabilization at 7～14NL/min.As seen from Figure 5,2 air capacities are in 0～3.2NL/min scope, and flame is stable, limit when above at this, take place flourishing.As seen from Figure 6,3 air capacities are in 90～110NL/min scope, and flame is stable, when this limit is following, produce flourishing phenomenon.

Fig. 7 represents the result of the test to 2 air, as seen from the figure, when 20NL/min, produces smog.

Fig. 8 represents other embodiment of the burner of band atomising device of the present invention, particularly represents a kind ofly to be called round, integral body and slightly to be burner cylindraceous.In the present embodiment, the oscillator sound collector of employing is to have the sound collector that the horn shape end is the hole enlargement type, and this embodiment and Fig. 1, difference embodiment illustrated in fig. 2 have: the configuration of oscillator sound collector 10 is that the top is stretched in 1 bottom from the spray chamber; The end of fuel feed pipe 9 is located at the end of oscillator sound collector 10; The aperture of 2 airport a is 0.7mm, is provided with 20, and the aperture of 2 airport b is 1.2mm, is provided with 40; The aperture of 3 airport c is 1.2mm, is provided with 45, and the aperture of 3 airport d is 1.2mm, is provided with 60,3 airport e, and the aperture of f is 1.4mm, is provided with 60; 3 airport d, e, f are staggered arrangement, and the top of the rake of spray chamber 1 and bellows 2 forms level and smooth inclined-plane with mild angle.The burner of present embodiment is supported by 3 suspension columns 129.

Below, with reference to Fig. 9 and Figure 10 another embodiment of the present invention is described.In the present embodiment, represent with same label that with Fig. 1, identical part embodiment illustrated in fig. 2 its explanation is omitted.

In the present embodiment, on bellows 2, be the center with the opening part 6 of above-mentioned spray chamber 1, left and right symmetrically respectively is provided with 2 airport a～c of 3 rows and 3 airport d～h of 5 rows, and these airports are staggered and arrange.In bellows 2, be provided with 2 air wind channels 16 and 3 air wind channels 17 from air supply line 19 top sets, above-mentioned 2 airport a～c are communicated with 2 air wind channels 16, and 3 airport d～h are communicated with 3 air wind channels 17.The wind channel 19 that is connected with air blast 3 is communicated with 3 air wind channels 17, simultaneously by air capacity switching device shifter 4 and 1 time and 2 air wind channels 11,16 connections.

Slide-valve 21 that air capacity switching device shifter 4 is provided with by the air capacity distributor chamber 20 of air being distributed to 1 time and 2 times air wind channel 11,16, between this air capacity distributor chamber 20 and above-mentioned intake adit 19 and the column type coil 22 that drives this slide-valve 21 constitute.More particularly, air capacity distributor chamber 20 is separated by the dividing plate 23 that the center has aperture A, clips simultaneously on the wind channel 19 of this dividing plate 23 and has aperture B, C.The aperture of these apertures A, B, C is according to the air capacity decision of the wind channel 11,16,17 of supplying with 1 time, 2 times and 3 times air.Be provided with opening 25 on slide-valve 21, under above-mentioned column type coil 22 closed conditions, slide-valve 21 moves to the diagram left by the elasticity of spring 26; When the column type coil was electric on-state, it is right-hand mobile to diagram that slide-valve 21 heads on spring 26.In the present embodiment, supply with the low discharge air of 1 time and 2 times air capacity and regulate, also this hole can be located on the slide-valve 21 by the aperture on the dividing plate 23.

Below, the effect of burner of the band atomising device of the present invention of said structure is described with reference to Figure 11, about fired state,, be omitted in this explanation because as hereinbefore.

During igniting

Shown in Figure 11 (a), in case open main switch, air blast 3, ultrasonic oscillator is connected, and column type coil 22 is closed, then, and ignition transformer, petrolift is connected in turn.Because the column type coil is closed condition, slide-valve 21 is positioned at the diagram left direction, and opening 25 and aperture B are communicated with.Therefore, from air blast 3 process wind channels 19 leaked-in airs, major part flows to air wind channel 17 3 times, a part is through opening 25, aperture B and air chamber 20 flow in 2 air wind channels 16, because be subjected to the restriction of the aperture A of distributor chamber 20, a spot of air flows in the wind channel 11 of 1 air.For example, when fuel was supplied with to 5cc/min, the tolerance that flows into 1 time～3 air wind channels was than preferably being about 2: 25: 95NL/min, certainly, suitably change above-mentioned numerical value according to various conditions.But if 1 air excess, flame will enter in the spray chamber 1, forms the rough burning that is interrupted; If 2 lack of air then can produce white cigarette at once after igniting.If give hot time weak point, will in the spray chamber, produce the tempering that is interrupted again.As previously mentioned, giving of fuel and 1 air mixes gas from beginning to be fed in the spray chamber 1, and the 1 interior mixed gas that gives reaches thermal steady state to the spray chamber, needs 20 seconds time, and flame is the flame that mixes of blue flame and luminous flame under this state.Again, the foul smell during igniting takes place in the several seconds after igniting, if increase the reacting dose of flame hole, then can realize completing combustion and does not produce foul smell.

During normal combustion

When cylindrical coil 22 electricity are connected, slide-valve 21 is right-hand mobile to diagram, opening 25 is communicated with aperture c, therefore, from air blast 3 through wind channel 19 leaked-in airs, major part flows in the wind channel 17 of 3 air, a part flows in the wind channel 11 of 1 air through opening 25, aperture c and air chamber 20, because the restriction of the aperture A of distributor chamber 20, a spot of air flows in the wind channel 16 of 2 air, that is to say that compare during with igniting, 1 time air capacity increases and 2 air capacities minimizings.

Compare during with igniting, when normal combustion, 1 time air capacity increases, 2 times air capacity reduces, and the ratio of supplying with 1 time～3 air wind channels is, when being 5cc/min as fuel feed, its ratio is preferably 10: 1.8: 95NL/min, certainly, suitably change above-mentioned data according to various conditions.But as previously mentioned, if 1 air excess then can produce the tempering in spray chamber 1, if when not enough, it is unstable that blue flame can be slightly.If 2 air excess, then blue flame and flourishing flame mix.If 3 lack of air then can be mixed with flourishing flame in blue flame.

During fire extinguishing

Same during with igniting, make cylindrical coil 22 be closed condition, slide-valve 21 moves to the diagram left, and opening 25 is communicated with aperture B, has limited air capacity 1 time, increases by 2 times air capacity, after this, stops to supply with fuel.At this moment,, the unburned gas that remains in the spray chamber 1 is burnt fully, therefore foul smell does not take place because 2 air penetrate in the spray chamber 1.

Figure 12 represents the another kind configuration example of above-mentioned oscillator sound collector 10.In the embodiment of Fig. 1 and Fig. 2, fuel feed pipe 9 and oscillator sound collector 10 put in the spray chamber, when fire extinguishing, after stopping to supply with fuel, because the air themperature of spray chamber 1 is up to 400～500 ℃, after the several seconds, the fuel that remains in sometimes in the fuel feed pipe 9 can evaporate ejection, thereby produces foul smell.Again, because long-play has the tar generation can make pipe blocking cause changes in flow rate in the time of on the sidewall of fuel feed pipe 9.

For this reason, in this example, fuel feed pipe 9 and oscillator sound collector 10 are arranged on a side of 1 air wind channel outside the spray chamber 1, so just reduced from Temperature Influence in the spray chamber 1, and owing to be subjected to the cooling of 1 air, can prevent the evaporation of residual fuel in the fuel feed pipe when fire extinguishing, can also prevent simultaneously the generation of tar in the fuel feed pipe 9, and can prevent because the temperature rising makes the decline in the service life of oscillator sound collector 10, prevent because the heat transfer of sound collector 10 causes the mis-behave of electricity/sound conversion element 13, also can suppress to reduce high-frequency oscillating circuits and load owing to the rise heat loss of the ultrasonic vibration increase or the inefficient power that current/voltage out-phase causes of sound collector 10 temperature increases.

Below, the control method of the burner of band atomising device of the present invention is described with reference to Figure 13 to Figure 16.

Figure 13 represents the control system with the burner of atomising device.With embodiment illustrated in fig. 9 in identical position indicate with same label, its explanation is omitted.Among the figure, the 51st, ignition transformer, the 52nd, flame detector, the 53rd, oil vessel, the 54th, petrolift, the 55th, air cleaner, the 56th, pressure fan, the 57th, control device.Its control method below is described.

When (one) lighting a fire

As shown in figure 14, open the running switch, the motor of air blast 3 is connected.After the prepurging time through 10 seconds, ultrasonic oscillator, air supply motor, petrolift, ignition transformer are connected respectively then.In case under the situation of lighting a fire again immediately again after the fire extinguishing, the prepurging time is necessary, not necessarily want generally speaking.At this moment, because the cylindrical coil 22 of 1 time, 2 times air switching device shifter is closed condition, through 3 air wind channels 17 of the most of inflow of wind channel 19 leaked-in airs, a part flows into 2 air wind channels 16 from air blast 3, and little air flows into 1 air wind channel 11.During igniting, 1 time air needs hardly, just in order to disperse spraying, just import 1～2% air of combustion air total amount, 2 times the optimal range of flow of air capacity is 20～30% of a combustion air total amount, this air makes the burning beginning and promotes burning, and the too much or very few ignition performance that all can make of air capacity worsens.3 times air is about about 70～80% of combustion air total amount.

Under this state; oscillator 13a drives supersonic atomizer 5, is begun to supply with fuel to the range of atomization, end of oscillator sound collector 10 through rail 9 by combustion pump 54, at this moment; fuel is by micronize, and the little air that flows out with the wind channel 11 from 1 air is sprayed in the spray chamber 1.

(2) during normal combustion

Give and fixed give the hot time when finishing, cylindrical coil is driven, and flows into 3 air wind channels 17 through wind channel 19 leaked-in airs are most of from air blast 3, and a part flow in 1 air wind channel 11, and a spot of air flows in 2 air wind channels 16.That is to say, compare during with igniting, increased air capacity 1 time, reduced air capacity 2 times.

Under this normal combustion state, the flame status that is detected by flame detector is stable, can set ventilation volume, begins ventilation control.Again, when normal combustion, 1 air capacity account for the ratio of total air and 1 time, 2 times air switching time relation as shown in figure 15, preferably select suitable switching time according to 1 air capacity.

When (three) putting out a fire

The switch that will turn round disconnects, and closes cylindrical coil 22, gets back to original state, limits 1 time air capacity, increase by 2 air capacities after, stop to supply with fuel.In this state, 2 times air penetrates in the spray chamber 1, spray chamber's 1 interior remaining unburned gas is fully burnt, thereby do not produce foul smell.Because supersonic atomizer has the promotion effect of combustion, works on a scheduled time, for example 10 seconds.Then, after the cleaning of having carried out a scheduled time, close the motor of air supply motor 56, air blast 3, running stops.

Below, with reference to Figure 16 control flow among the present invention is described.

At first, connect the running switch, connect blower motor relay (step (1), (2)).Then, through one prepurging period, for example 10 seconds, connect the air supply motor relay respectively, ignition transformer (step (3), (4)), then, when point catches fire, cut off ignition transformer (step (5), (7)), when not catching fire, through cutting off ignition transformer (step (6), (7)) after 15 seconds.Then, when flame is detected, after the hot time, connects 1 time, 2 times air and switch the plate washer relay, carry out the switching (step (8)～(10)) of 1 time, 2 times air capacity ratio through 30 seconds give.Like this, when reaching the normal combustion state, set ventilation volume, the control of taking a breath.Continue the control quantity combusted simultaneously, burn away.(step (11), (12)).Only otherwise when situation that the action of sense shake device, power failure, oil supply, running switch cut off takes place, just continue this burning (step (13)～(15) NO), and when the action of flame sense shake device, power failure, oil supply, running switch are cut off one of them situation and take place (step (13)～(15) Yes), switch the plate washer relay with regard to fuel shutoff pump relay and 1 time, 2 times air, after after a while, cut off the ultrasonic oscillator relay, then, after cleaning, air supply motor relay and blower motor relay cut off.Burning stops.

In the above-described embodiments, the switching of 1 time, 2 times air capacity is carried out behind certain hour after the igniting, also can be in the spray chamber 1 temperature reach that certain value carries out when above, switching can not be once to finish also, but finishes by stages.Carry out also can adopting triple valve or bimetal leaf etc. the air capacity switching except adopting cylindrical coil to drive slide-valve again.

Below, the configuration of another feature of the present invention-3 time airport is described with reference to Figure 17 and Figure 18.

2 airport a～c above Figure 17 (a) expression bellows 2 and the configuration example of 3 airport d～h.2 airport a～c of 3 rows and 3 airport d～h of 5 rows are staggered respectively.But this configuration mode makes 3 airport air demand deficiencies at bellows 2 two ends, and because the outer wall at bellows 2 two ends makes the flame cooling, delay of response makes the end flame 30 of flame hole extend, shown in Figure 17 (b).In addition, produce flourishing problem in addition.

Result according to test of many times learns, if dispose airport 3 times by mode shown in Figure 180, just can vertically obtain uniform blue flame.That is to say that in 3 airport d～h of 5 rows, airport j is added at the position that does not form the hole in bellows 2 ends, to promote the burning in bellows 2 ends.

Figure 19 represents other embodiment of spray chamber 1 and bellows 2, and the top of bellows 2 to lopsidedness, bellows 2 above and spray chamber 1 between forms combustion space 15 at this from the opening part 6 of above-mentioned spray chamber 1.Be applicable to that the whole burner that slightly is cuboid can make the device thin typeization as so-called linear.Because the combustion space is one-sided, compare at the device of both sides with the combustion space, simple structure, and can seek the thin typeization of device integral body, simultaneously, and can visual flame integral body, from visually basking, and help safety, also be convenient to the air-supply of combustion air.

Figure 20 is the embodiment oblique view after expression changes spray chamber's 1 shape.Be provided with some thermofins 60 in spray chamber 1, like this, the temperature when fast ignition is with fire extinguishing more in the spray chamber 1 rises.

Figure 21 represents that another changes the sectional drawing of the shape embodiment of spray chamber 1, it is characterized in that being provided with groove 70 in the end that forms spray chamber's 1 opening part 6.This groove 70 also can be located at the middle part of the inclined wall of spray chamber 1.In spray chamber 1, the drop that sprays into has some attached on the wall, droplet congregating gets up will be toward dirty, will be trapped in groove 70 along the drop under the wall flow like this, even therefore (for example below freezing) slow and tangible foul smell generation that also can prevent to light a fire when low temperature obtains stable initiation combustion state.Compare with the spray chamber of shape before, wall adheres to the tolerance height of drop, thereby can reduce vaporizer, thereby can seek the miniaturization of device integral body.

Figure 22 represents an embodiment of combustion space.In the linear pattern burner, spray chamber 1 slightly is rectangular shape, and the sidewall outside relative with the sidewall that supersonic atomizer 5 is set also forms combustion space 15.Again, the shape of spray chamber 1 is not defined as cuboid, a part of sidewall can be made curve form yet.

Figure 23 represents an embodiment of one of feature of the present invention spray chamber 1, near spray chamber's 1 opening part 6 that influenced by the combustion heat, the setting muscle 8 of some pins or fibula type is set, and the sidewall of clamping this opening 6 is coupled together.Shown in Figure 23 dotted line,, can suppress the distortion of sidewall forcibly by the setting muscle 8 of these pins and fibula type is set.

Figure 24 represents to change another embodiment of the shape of spray chamber 1, between the sidewall both side ends and burner outer wall of spray chamber 1, is provided with retractable heat-insulating material 18, and this heat-insulating material 18 can be made with materials such as for example ceramic fibres.The thermal expansion of spray chamber's 1 sidewall is absorbed by this heat-insulating material 18.

Figure 25 represents to change the another embodiment of spray chamber's 1 shape, and spray chamber 1 is surrounded by pipe 8a, the air or the water that are circulating in this pipe and cooling off usefulness.The burned heat heating of the air of this cooling usefulness or water becomes available hot gas, hot water.Can also be in the spray chamber 1 inwall pipe is set, also can surround threading water in this cover with inwall or the outer wall of cover with spray chamber 1.

Figure 26 represents the wind channel of 2 air of another kind of form, in the wind channel 16 of 2 air, from upstream side downstream side make the air duct cross section diminish gradually ground tilted configuration plate 8b.When not establishing this dividing plate, as previously mentioned, when normal combustion, 2 air capacities very little (1～2%) of coming out from 2 airports, sometimes, unburned gas is back in 2 air wind channels 16 and becomes tar, after the burning running finishes, the device cooling, they just separate out, become the reason that foul smell takes place in 2 air wind channels.If dividing plate 8b of the present invention is set, then the air from 2 airport ejections is uniformly, and makes 2 pressure in the air wind channel 16 keep malleation, thereby prevents that unburned gas from refluxing to the wind channel 16 of 2 air.

Figure 27 represents 2 air wind channels of another form, and 2 times air wind channel 16 is made of some pipes 18, has 2 times airport on this pipe 18, can obtain the effect same with Figure 25.

Figure 28 represents the schematic diagram of fuel feed system.Fuel is supplied with electromagnetic pump 32 sucking-offs from fuel tank 31 by fuel, delivers to oscillator sound collector 10 through fuel feed pipe 9.Near oscillator sound collector 10 place's openends of fuel feed pipe 9, form routine U font as shown in the figure, on this example U-shaped pipe 35, connecting an end of return duct 33, the other end leads to fuel tank 31 by throttle orifice 34.

Fuel, is delivered in the oscillator sound collector 10 through this pipe 9 from fuel tank 31 inspiration fuel feed pipes 9 by pump 32 again, and drip by micronize in 10 places at sound collector.If burning stops, pump 32 is stop supplies fuel also, in spray chamber 1, because the pressure head effect that produces pressure by the air-supply blast is arranged, the fuel of fuel feed pipe 9 ends is returned in the fuel tank 31 by return duct 33.Owing to be provided with throttle orifice 34, make that the short-circuit cycle that fuel returns fuel tank 31 is limited in Min. when burning.

In addition, in the above-described embodiments, the branching portion of return duct 33 forms at fuel feed pipe 9 and is 35 places, routine U font position, as is not limited to this form, also can form branching portion in the end of fuel feed pipe, connect return duct 33 again, at this moment, return the fuel of fuel tank 31, from the end of fuel feed pipe 9 to this branching portion, therefore, can reduce the next fuel service time when beginning that burns, the beginning advanced ignition.

Below, the different shape of spray chamber 1 is described with reference to Figure 29 to Figure 34.

Embodiment illustrated in fig. 29 is that near the sidewall the opening part 6 of spray chamber 1 is narrowed to curved surface shaped, and spray chamber's 1 another sidewall forms a continuous face with the face of the bellows 2 that have air supply hole.One side of the upper curved surface of bellows 2 is connected with 2 air wind channels 16, and opposite side is connected with 3 air wind channels 17.Like this, compare more compact structure with Fig. 2 embodiment.

Among the embodiment shown in Figure 30, near the sidewall spray chamber's 1 opening 6 is constriction not, but forms the form of vertical wall, and the air supply range of 3 air wind channels 17 also is to form vertical wall, and is relative with the former; The air supply range of 2 air wind channels 16 is horizontal.

Among the embodiment shown in Figure 31, be near the opening 6 of spray chamber 1 sidewall constriction not with identical point embodiment illustrated in fig. 30, still, the air supply range of bellows 2 is made curve form with embodiment illustrated in fig. 29 identical.

Among the embodiment shown in Figure 32,1 outside wall surface place also forms air wind channel 17 3 times in the spray chamber, and mixing is spread in the both sides in combustion chamber 15, makes burning more stable.

Among the embodiment shown in Figure 33, whole convergent-divergent portion 18 is formed at 1 bottom in the spray chamber, and this convergent-divergent portion 18 also can install other parts, perhaps uses heat-insulating material.

Among the embodiment shown in Figure 34, the end face of spray chamber 1, the sidewall that atomising device 5 is set and the sidewall relative with this sidewall are all made the curve form with the spray model unanimity, and like this, structure is compact more.

Below, with reference to Figure 35 to Figure 42, be described for the embodiment that is provided with the auxiliary air wind channel.Represent with same label that with Fig. 9, parts identical in embodiment illustrated in fig. 10 its explanation is omitted.

As shown in figure 36, the top of bellows 2 is curve form, and narrowing portion 6a is formed at the bottom of spray chamber 1, in the periphery of this narrowing portion 6a, auxiliary air wind channel 14 is arranged, and which is provided with airport i, j, k, and this hole is facing to bellows 2.As shown in figure 35, this auxiliary air wind channel 14 is by the arm 11' air supply of 1 air wind channel 11, and narrowing portion 6a makes the exit passageway of spray chamber 1 become narrow, thereby has promoted the mixing of air and fuel, thereby makes flame distribution even.In addition, because air is from the auxiliary air hole i～k and 3 relative arrangements of airport d～h of auxiliary air wind channel 14, the bottom of spray chamber 1 is cooled, and prevents that its temperature from rising and improved service life.Because in the position in these holes, the stretching, extension of flame is suppressed again, thus the exhaust performance when having improved lack of air.

1 time, the ratio of auxiliary, 2 times and 3 times air capacities is preferably about 2: 2: 24 when fuel is supplied with to 5cc/min: 94NL/min, should suitably change above-mentioned numerical value according to various conditions certainly.

Among the embodiment shown in Figure 37, the side of the narrowing portion 6a of 1 bottom is provided with auxiliary air wind channel 14 in the spray chamber, and the face that has air supply hole on opposite side relative with this side and the bellows 2 forms a continuous face.One side of bellows 2 upper curved surface links to each other with 2 air wind channels 16, and opposite side links to each other with 3 air wind channels 17.Like this, compare more compact structure with the embodiment of Figure 36.

Among the embodiment shown in Figure 38, the sidewall of spray chamber 1 forms vertical wall, and the air supply range of 3 the air wind channels 17 relative with this vertical wall also is a vertical wall, and the air supply range of 2 air wind channels 16 is horizontal.

Among the embodiment shown in Figure 39 the air supply range of 2 times and 3 times air wind channels 16,17 different with embodiment shown in Figure 36 be not to be the curved surface shape but to form by the plane of different gradients.

Among the embodiment shown in Figure 40, supply with 2 air, only supply with air in the bellows 23 times by auxiliary air wind channel 14.Because 2 air are supplied to the narrowing portion 6a and the combustion space 15 of spray chamber 1, initiation combustion is carried out in narrowed portion, therefore, in bellows 2, do not need to be provided with the wind channel of 2 air, make simple structure, compact conformation.Because when normal combustion, little air is discharged again, so can reduce the temperature of spray chamber 1 and improve its service life.

Among the embodiment shown in Figure 41, supply with 3 air, only supply with air in the bellows 22 times by auxiliary air wind channel 14.Do not need to be provided with the wind channel of 3 air in the bellows 2, make simple structure, compact conformation.

Figure 42 is the embodiment that expression is applicable to the cylinder type burner, (a) is sectional drawing, (b) is plane.It is cylindric that spray chamber 1 slightly is, and its underpart periphery has the wind channel 14 of auxiliary air, and the electricity of supersonic atomizer 5/sound conversion element 13 is arranged in 3 air wind channels 17.Other structure is identical with the embodiment of Figure 36, and present embodiment is compact conformation not only, and has strengthened the cooling effect of electricity/sound conversion element.

More than be described with regard to embodiments of the invention, but the present invention is not limited to each above-mentioned embodiment, can also do all variations, for example, in the above-described embodiments, atomising device is to adopt the atomising device that utilizes ultrasonic vibration, also can adopt the atomising device that is for example formed spray pattern by the pressure injection valve.

Claims (17)

1, a kind of burner with supersonic atomizer, include the supersonic atomizer that liquid fuel is atomized in the range of atomization of tubaeform ticker, liquid fuel is supplied to the fuel supply pipe of range of atomization, supply air to the primary air wind channel of range of atomization, the igniter that atomized fuel and air Mixture are lighted, it is characterized in that, there are fuel and air to mix the spray chamber that forms gaseous mixture and this gaseous mixture is flowed towards its underpart opening place downwards with this supersonic atomizer atomizing, described supersonic atomizer is installed in this spray chamber, described liquid fuel supply pipe and described 1 air wind channel, near the inherent underpart opening in this spray chamber described igniter is installed, surround described spray chamber the bottom and and the spray chamber between form the bellows of combustion space, be located on the bellows some air supply holes towards the combustion space, 2 air wind channels of supply air from air supply hole toward the combustion space, switch the air capacity switching device shifter of the air quantity delivered of above-mentioned 1 air wind channel and 2 air wind channels, after described gaseous mixture is lighted in the spray chamber, blow out to the combustion space from spray chamber's lower ending opening, burn by 2 air-breathings in the combustion space.

2, the burner of band supersonic atomizer as claimed in claim 1; It is characterized in that forming narrow in the bottom of above-mentioned spray chamber.

3, the burner of band supersonic atomizer as claimed in claim 1, it is characterized in that the some air supply holes that are provided with are staggered arrangement on the position, opposite of bottom, above-mentioned spray chamber, the airport that interpolation is set on the position of air supply hole is not set at the two ends of each round.

4, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that being formed with the groove that prevents that drop from falling on the internal face of above-mentioned spray chamber.

5, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that except the side that atomising device is arranged, and above-mentioned combustion space forms in the whole outside of spray chamber.

6, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that between the sidewall of above-mentioned spray chamber, is linking the setting rib that some pins or fibula constitute.

7, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that in the sidewall both side ends of above-mentioned spray chamber retractable heat-insulating material being set.

8, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that the inside and outside wall of above-mentioned spray chamber has been carried out forcing cooling.

9, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that forming narrow in the bottom of above-mentioned spray chamber, is formed with the auxiliary air supply road of band airport in the periphery of this narrow.

10, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that disposing dividing plate obliquely in above-mentioned the 2nd air wind channel from the upstream side to the downstream.

11, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that having disposed some pipes in above-mentioned the 2nd air wind channel, has airport on these pipes 2 times.

12, the burner of band supersonic atomizer as claimed in claim 1 is characterized in that near the end of fuel feed pipe forming a branch point, is connected a return duct of being with throttle orifice between branch point and fuel tank.

13, a kind of control method of the burner with supersonic atomizer includes the following step:

Atomizing zone supply liquid fuel at the tubaeform ticker of supersonic atomizer; With liquid fuel atomization, spray to the range of atomization; By the 1st air wind channel blow out air, and and the liquid fuel that atomized mix in the spray chamber and form mist;

It is characterized in that:

Above-mentioned mist flows downwards, flows to the opening of spray chamber; Light mist by near the igniter that is disposed at the opening; In the combustion space that between the bellows of the bottom that surrounds above-mentioned spray chamber and spray chamber, forms, mist burns, simultaneously, bellows are to combustion space 2 air of supply and 3 air, 2 times air blows to above-mentioned opening, 3 air blow to the bottom of spray chamber, and switch 1 air capacity, 2 air capacities and 3 air capacities according to fired state.

14, the control method of the burner of band supersonic atomizer as claimed in claim 13, the switching that it is characterized in that air capacity are to carry out behind igniting and/or fire extinguishing certain hour.

15,, it is characterized in that the spray chamber's temperature that switches in of air capacity reaches certain predetermined value and carries out when above as the control method of the burner of band supersonic atomizer as described in the claim 13.

16, the control method of the burner of band supersonic atomizer as claimed in claim 13, the switching that it is characterized in that air capacity are to carry out when following for certain predetermined value in the temperature of spray chamber.

17, as the control method of the burner of band supersonic atomizer as described in the claim 13, the switching that it is characterized in that air capacity is when igniting and/or fire extinguishing, reduces 1 time air capacity, increase by 2 times air capacity, when normal combustion, increase air capacity 1 time, reduce 2 times air capacity.

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