CN1756925A

CN1756925A - Gas combustion device

Info

Publication number: CN1756925A
Application number: CNA2004800061777A
Authority: CN
Inventors: 石大新次; 岩城克典
Original assignee: Re Tec Inc
Current assignee: Re Tec Inc
Priority date: 2003-03-07
Filing date: 2004-03-03
Publication date: 2006-04-05
Also published as: KR20050114639A; KR100669220B1; WO2004079262A1; JP2004271042A; US20060172244A1; TW200506275A; AU2004217672C1; AU2004217672B2; AU2004217672A1; CA2518472A1; JP3927134B2; EP1617140A1

Abstract

A gas combustion device 1 has a combustor 7 for burning supplied combustion gas therein, an ejector 3 with a primary air hole for sucking a primary air due to ejector effect, and an ignitor 5 for igniting mixed gas injected from a wick 25 provided ahead of the ejector 3. The combustor 7 has a primary combustion chamber 11 for igniting and burning the mixed gas injected from the wick 25 therein, a secondary air hole 33 for supplying a secondary air to the gas burning after ignition, a secondary combustion chamber 13 for further burning the gas burnt in the primary combustion chamber 11 therein, and a tertiary air hole 35 for supplying a tertiary air to the gas burning in the secondary combustion chamber 13. Even when the amount of the primary air is increased, thereby improving ignitability of the mixed gas, since the secondary air is supplied to the gas after ignition in the primary combustion chamber, combustion performance of the gas is improved.

Description

Gas combustion apparatus

Technical field

In particular, the present invention relates to a kind of gas combustion apparatus that produces efficiency of combustion hot blast high, completing combustion or warm braw with the combustion flame of liquefied petroleum gas (LPG) as thermal source.

Background technology

In the past, as thermal source, be contained in the interior gas combustion apparatus of devices such as portable hair hair-dryer or fan heater with LPG by known.

Referring to figs. 1 to Fig. 3, for example, be contained in the gas combustion apparatus 101 in the hair dryers, the burner 103 of burning gases is arranged in the cylindrical case 105 of hair dryers.Burner 103 makes the gas combustion of the burning usefulness of being supplied with from the gas tank of storing fuel (diagram is omitted).Blow out to outlet side by the air of burner heating air blast (diagram is omitted) by means of the entrance side that is arranged on shell 105.

In Fig. 1, not shown gas tank is connected by gas passage 107 with burner 103.Because to the burning gases flow velocity that burner 103 is supplied with, the pressure in the gas passage 107 is compared with the device outside becomes negative pressure.Be provided with in the end of gas passage 107 and utilize external pressure and gas path 10 7 pressure inside poor, be used for sucking the injector with suction inlet 109 111 of extraneous gas from the outside of gas passage 107.

Details as shown in Figure 2, in injector 111, institute's gas supplied is nozzle 113 high velocity jet of LPG in the injector 111 for example.Because the injection effect due to the jet velocity of the gas that is sprayed causes forming in the gas passage 107 and in the injector 111 negative pressure, thereby the extraneous gas that is used for mixing with burning gases flows into from suction inlet 109, its result has generated gas jet and Air mixing gas.

Mist sprays from the burning core (wick) 115 (wire netting) of the inside of being located at burner 103 entrance sides.The spark that is produced by the spark plug (plug) 117 (igniter) (with reference to Fig. 3) of high-tension igniton splashes to spraying combustion of mixed gas core 115, lights mist.

Burner 103 is disposed between the outlet of air blast and shell 105.As shown in Figure 3, the section configuration vertical with the length direction of burner 103 is non-circular cylindrical body (the first prior art example: TOHKEMY 2002-233416 communique), burning core 115 is disposed at the centre of gas combustion apparatus 101, and, 8 ditch shape combustion chambers 119 that around burning core 115, have 8 radiation directions that are 8 shape for lugs such as star such as branch such as grade.

In the gas combustion apparatus of above-mentioned prior art, owing to be provided with to supply with the injector 111 of burning gases to burner 103, thereby since the nozzle 113 in the injector 111 with the injection effect due to the jet velocity of the gas jet of high velocity jet, extraneous gas automatically sucks from suction inlet 109.Therefore, owing to generate gas and Air mixing gas, and spray from the surface of burning core 115, thereby can promote completing combustion.

But the combustibility of the burning gases after the ignition performance of above-mentioned mist and the igniting is opposite relation.That is, in order to improve the ignition performance of gas, in mist, gas ratio need be higher than air blending ratio, but can produce more unburnt gas when gas ratio is burnt under high state, combustibility worsens, and consequently CO concentration increases.

On the contrary, increase air capacity in order to improve efficiency of combustion, when reducing the gas ratio in the mist,, be difficult to igniting, even aphlogistic problem occurs though combustibility has improved.

Therefore, in order to keep ignition performance to a certain degree, even reduce the size of the suction inlet 109 of above-mentioned injector 111 in order to control the air capacity of suction air less, for the above reasons, the mist high with efficiency of combustion compares, because the air mixed proportion reduces, and causes some deficiency of air, and the problem that exists CO concentration to increase and so on.

In addition, according to prior art example 2: Japanese Patent Application 2002-249347 number, it discloses a kind ofly supplies with the burner that the secondary combustion chamber that derives from the auxiliary air of extraneous gas and make it to burn constitutes by making from the primary zone of the mist burning of burning core ejection with to the gas that has burnt in this primary zone, and has confirmed that secondary combustion chamber can promote the completing combustion of burning gases.

, CO concentration is still high in the above-mentioned second prior art example, also has room for improvement.

Summary of the invention

Purpose of the present invention is exactly to provide a kind of gas combustion apparatus in order to address the above problem, and improves the burning of gas performance when it can improve the ignition performance of gas, and can reduce CO concentration.To achieve these goals, according to gas of the present invention (gas) burner, have: burning is by the burner of the burning gases of gas supply source supply, transport the gas passage of the above-mentioned gas that comes from the above-mentioned gas supply source to said burner, the injector that in the above-mentioned gas passage, has the primary air entering hole part, above-mentioned primary air hole portion is used for the suction primary air that negative pressure that the flow velocity because of the burning gases of supplying with to said burner produces causes, be used for igniter that the mist that sprays from the burning core that is arranged at above-mentioned injector the place ahead is lighted a fire, be arranged at the primary zone on the said burner of the mist ignition of above-mentioned burning core ejection, be arranged at said burner, be used for auxiliary air entering hole part to the gas feeding secondary air of the indoor igniting after-combustion of above-mentioned primary combustion, mix the secondary combustion chamber that burns again with the gas that burnt in the above-mentioned primary zone with from the auxiliary air that above-mentioned auxiliary air entering hole part sucks, and to the tertiary air entering hole part of supplying with tertiary air at the gas of above-mentioned second-time burning Indoor Combustion.

Description of drawings:

Fig. 1 is the side view of the gas combustion apparatus of prior art.

Fig. 2 is the sectional drawing of the injector part of Fig. 1.

Fig. 3 is the front view from the seen gas combustion apparatus in the left side of Fig. 1.

Fig. 4 is the sectional drawing along the IV-IV line of Fig. 6 of the gas combustion apparatus of embodiments of the invention.

Fig. 5 is the side view of the gas combustion apparatus of embodiments of the invention.

Fig. 6 is the front view from the seen gas combustion apparatus in the left side of Fig. 5.

Fig. 7 is the rearview from the seen gas combustion apparatus in the right side of Fig. 5.

The specific embodiment

Below, figure illustrates one embodiment of the present of invention with reference to bowing.

With reference to figure 4, the gas combustion apparatus 1 of present embodiment has: be used for mixed combustion gas for example LPG and air and generate the injector 3 of mist, be used for the igniter of the mist igniting that generated by injector 3 electrode 5 for example, burning is by the combustion of mixed gas device 7 of electrode 5 igniting.

The combustion chamber 9 of burner 7 is made of aluminium (die casting), and shown in Fig. 6,7, the left and right side of the length direction of burner 7 is circular cylindrical body basically.The inside of combustion chamber 9 is made of the primary zone 11 that is positioned at Fig. 4 right side, the secondary combustion chamber 13 that is positioned at these 11 the place aheads, primary zone (at the left of Fig. 4).The gas that injector 3 is loaded on 11 rears, primary zone (Fig. 4's is right-hand) imports a side.

Above-mentioned injector 3 is provided with nozzle 19 at the inlet side that section is injector body 15 cylindraceous basically, this nozzle 19 be used for spraying from store burning gases for example the gas supply source that waits of the gas tank of LPG (figure omits) pass through for example gas supply pipe 17 gas supplied as gas passage.

The front end of nozzle 19 is provided with the pin hole spray-hole (omitting among the figure) that the aperture is Φ 60 μ m-Φ 200 μ m, this spray-hole is arranged on the throttle orifice (orifice) of the substantial middle position of pin hole dish, and LPG sprays at a high speed with transonic speed from spray-hole finely.And, in nozzle 19, be equipped with to remove and make the impurity that spray-hole stops up and the filter (omitting among the figure) of rubbish.Filter can adopt sintering metal of the pin hole that for example has 10-30 μ m aperture and so on.

In addition, be provided with the primary air entering hole part 23 that is used for from outside suction primary air into LPG and primary air being mixed the blender 21 that the back imports burner 7, on the sidewall of blender 21, having in the inside of the injector body 15 in nozzle 19 the place aheads.Therefore, in the blender 21 because of from said nozzle 19 at a high speed the gas of ejection form negative pressure, thereby primary air is inhaled into, on one side mix on one side core 25 conveyings of for example burning mutually with burning gases to the gas combustion portion that is positioned at the place ahead.This is called the injector effect.By regulating the area of primary air entering hole part 23, gram is regulated the ratio of primary air.

Burning core 25 makes cylindric as gas combustion portion for example available 50-150 purpose SUS wire netting, be installed in the front end of injector body 15 in the mode of for example welding, is arranged at the approximate centre position on Fig. 4 right side of the primary zone 11 of burner 7.In addition, will be installed in the front end of burning core 25 as the burning core stabilizer 27 (wick holder) of craspedodrome suppressing portion in the mode of for example welding.Utilize burning core stabilizer 27 to suppress, and main the promotion flowed out, and discharges LPG and Air mixing gas from the mesh of burning core 25 to side direction (the arrow A R1 direction of Fig. 4) from the craspedodrome of the mist of blender 21 ejections.And the flame after the igniting is blue, circular.

In addition, former electrodes 5 is located at the inside of burner 7, the place ahead and the close side of burning core 25.The high-tension electricity that produces with the piezoelectric element (omitting among the figure) of igniting usefulness to electrode 5 input by electric wire 29, from the front end of electrode 5 to the burning core spark that splashes, the mist that spark initiation is come out from the core 25 that burns, gas takes fire.

Referring again to Fig. 6, be that the direction that radiates towards periphery at the center disposes along a plurality of grooves 31 of fore-and-aft direction extension with burning core 25 on the inwall of primary zone 11.In Fig. 6, be formed with 6 grooves 31.

Have again, on the rear wall (in Fig. 4, being right side wall) of primary zone 11, be provided with a plurality of auxiliary air entering hole parts 33 from the auxiliary air that derives from extraneous gas to primary zone 11 that supply with.A plurality of auxiliary air entering hole parts 33 are configured to the position feeding secondary air that leaves slightly around burning core 25.In other words, above-mentioned auxiliary air is configured in not to be influenced from the position of the mist of burning core 25 after coming out, and the position that promptly is configured to beyond igniting portion is supplied with to the gas after the igniting.Above-mentioned so-called igniting portion is meant the scope of splashing of the spark that electrode 5 takes place, shown in the scope that dotted line surrounded of Fig. 6, and a side of the electrode 5 around the core 25 that promptly burns.In the present embodiment, be provided with and amount to 5 auxiliary air entering hole parts 33 so that from the rear one side feeding secondary air of other each groove 31 except that the groove 31 that electrode 5 is installed.

In addition, in the wall of the primary zone 11 of 31 of each grooves, be provided with a plurality of tertiary air pipelines 35 as the tertiary air entering hole part to be used for supplying with the tertiary air that derives from extraneous gas to secondary combustion chamber 13.Present embodiment is provided with 6 tertiary air pipelines 35 altogether.

In addition, the area of the primary air entering hole part 23 by regulating injector 3, the ratio that can regulate primary air.In order to improve, be that the area of primary air entering hole part 23 is roughly half of its area with respect to the primary air entering hole part of prior art in the structure of present embodiment from the ignition performance of the mist of burning core 25 ejection.For example, if the aperture of the primary air entering hole part of prior art is D, the aperture size of the primary air entering hole part 23 of present embodiment is 0.73D.

And then each aperture of 5 auxiliary air entering hole parts 33 is 0.4D, and each aperture of 6 each tertiary air pipelines 35 (tertiary air entering hole part) is D.

In addition, periphery one side of combustion chamber 9 is provided with a plurality of fins 37 that are used for heat exchange, and the heat that this fin 37 is produced when being used to distribute mists burning in the combustion chamber 9 also promptly has the effect effect of carrying out heat exchange with cooling combustion chamber 9.

When adopting said structure LPG is supplied with when giving in the nozzle 19 of injector 3 through gas supply pipe 17, LPG sprays with transonic speed to blender 21 from the spray-hole as throttle orifice by the filter in the nozzle 19, form negative pressure in blender 21 internal cause injector effects, suck burning necessary primary airs (corresponding to the air burning gas ratio) and flow in the blender 21 from primary air entering hole part 23, the primary air of these inflows and LPG mix, and form mist burning core 25 ejections forwards.

And the increase and decrease according to LPG in blender 21 sucks the necessary primary air of burning pari passu automatically.In addition, therefore the aperture by reducing primary air entering hole part 23, thereby can spray ignition performance good mixing gas burning core 25 forwards to reduce the inlet of primary air.

Because the place ahead end face at burning core 25 is provided with burning core stabilizer 27, thereby the main SUS wire netting mesh from the side of burning gases (mist) sprays towards periphery.

Next,, produce electric spark, the mist with the gas ratio that is fit to igniting that ejects from burning core 25 is lighted reliably by the electrode in the burner 75 owing to supply with high voltage through electric wire 29.Burning of gas flame after lighting almost all from the burning core 25 the side be extended to circle laterally, the length of combustion flame is from about burning core 25 continuity tens mm, and 11 inside and 8 grooves 31 secondary combustion chamber 13 forwards of inwall transmit warm braw along the primary zone.

At this moment, higher owing to the burning gases ratio from the mist that burning core 25 comes out, though ignition quality is good, the increase of CO concentration causes combustibility low., because auxiliary air entering hole part 33 is located at igniting portion place in addition, thereby the increasing of the air capacity in the place beyond the igniting portion in the primary zone 11, CO concentration reduces.That is, because to the burning gases feeding secondary air after the igniting in the primary zone 11, thereby improve burning of gas efficient in the primary zone 11, improved combustibility.Therefore, in primary zone 11, remove can be reliably with from the mist ignition of burning core 25 ejections the time, the burning of the after-combustion gas that can also promote to light a fire reduces CO concentration.

Have again, tertiary air from extraneous gas passes through 6 tertiary air pipelines 35 (tertiary air entering hole part), on the one hand the temperature of the wall portion of primary zone 11 is reduced effectively, import the tertiary air of high temperature on the other hand by tertiary air pipeline 35 to secondary combustion chamber 13.Like this, further promoted the burning of gas reaction of secondary combustion chamber 13, combustibility improves.That is, combustion reaction is carried out easily, promoted completing combustion owing to the gas of finishing burning in primary zone 11 mixes with the tertiary air of high temperature.By adopting such structure, improved combustibility.As mentioned above, tertiary air has effect that reduces primary zone's 11 temperature and the effect that improves the combustibility in the secondary combustion chamber 13.In addition, about the quantity of tertiary air pipeline 35, in order to make combustibility and heat exchange two aspects all good, preferred 8.

From as can be seen above, if adopt the gas combustion apparatus 1 of the embodiment of the invention, owing to nearly all unburned gas burns totally in secondary combustion chamber 13, so 9 outside is difficult to occur flame in the combustion chamber.

In order to check the impact of performance of the present invention, the gas combustion apparatus 1 of the gas combustion apparatus of the above-mentioned second prior art example and present embodiment is measured CO concentration after the burning under the same conditions, under the situation of condition 1, the gas combustion apparatus of the second prior art example is 94ppm, and present embodiment is 41ppm.And under the situation of condition 2, the second prior art example is 119ppm, and present embodiment is 49ppm.

Therefore, can confirm, present embodiment since not only to secondary combustion chamber 13 in the supply tertiary air, and in primary zone 11 feeding secondary air, reduced CO concentration.In addition, though the burner of the above-mentioned second prior art example is similarly supplied with tertiary air, not feeding secondary air in primary zone 11 with present embodiment in the secondary combustion chamber 13 of burner 7.

In addition, the present invention is not limited to the foregoing description, can otherwise implement by suitably changing.The gas combustion apparatus 1 of present embodiment can be used in the gas combustion apparatus of employed fan heaters of operation such as the contraction operation of hair dryers, heat-shrinkable tube and drying, bonding, dissolving, soldering etc. or the gas combustion apparatus of other machine class.

According to the present invention, both can reduce the primary air amount, improve the ignition performance of the mist that comes out from the burning core, again can be in the primary zone gas feeding secondary air after igniting, improve the efficiency of combustion of primary zone's burning gases, thereby can improve combustibility.And then, import in the secondary combustion chamber owing to will derive from the tertiary air of tertiary air entering hole part, thereby can further promote combustion reaction, improve combustibility.Therefore, completing combustion easily reduces CO concentration.

And, owing to can reduce the primary air inlet, improve the ratio of burning gases, thereby can improve the ignition performance of the mist that comes out from the core that burns by the aperture that reduces the primary air entering hole part.

Further again, owing in the primary zone, the auxiliary air entering hole part is located at igniting portion place in addition, both without detriment to the ignition performance of the indoor igniting portion of primary combustion, can increase igniting portion air capacity in addition again, thereby improve the burning of gas performance, reduce CO concentration.

Claims

1. gas combustion apparatus is characterized in that having:

The burner of the burning gases that burning is supplied with by the gas supply source,

Transport the gas passage of the above-mentioned gas that comes from the above-mentioned gas supply source to said burner,

The injector that has the primary air entering hole part in the above-mentioned gas passage, above-mentioned primary air entering hole part are used for the suction primary air that negative pressure that the flow velocity because of the burning gases of supplying with to said burner produces causes,

Be used for igniter that the mist that sprays from the burning core that is arranged at above-mentioned injector the place ahead is lighted a fire,

Be arranged at the primary zone on the said burner of the mist ignition of above-mentioned burning core ejection,

Be arranged at said burner, be used for auxiliary air entering hole part the gas feeding secondary air of the indoor igniting after-combustion of above-mentioned primary combustion,

Mix the secondary combustion chamber that burns again with the gas that burnt in the above-mentioned primary zone with from the auxiliary air that above-mentioned auxiliary air entering hole part sucks, and

To the tertiary air entering hole part of supplying with tertiary air at the gas of above-mentioned second-time burning Indoor Combustion.

2. gas combustion apparatus according to claim 1 is characterized in that, in order to improve from the ignition performance of the mist of burning core injection, above-mentioned primary air entering hole part is set to the small-bore.

3. gas combustion apparatus according to claim 1 and 2 is characterized in that, above-mentioned auxiliary air entering hole part is arranged at the position to the burning gases feeding secondary air beyond the igniting portion.