CN101479533B - A solid fuel stove with improved combustion - Google Patents

A solid fuel stove with improved combustion Download PDF

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Publication number
CN101479533B
CN101479533B CN2007800239701A CN200780023970A CN101479533B CN 101479533 B CN101479533 B CN 101479533B CN 2007800239701 A CN2007800239701 A CN 2007800239701A CN 200780023970 A CN200780023970 A CN 200780023970A CN 101479533 B CN101479533 B CN 101479533B
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CN
China
Prior art keywords
combustion chamber
stove
air
hair
air stream
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Expired - Fee Related
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CN2007800239701A
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Chinese (zh)
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CN101479533A (en
Inventor
P·范德斯卢斯
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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Publication of CN101479533A publication Critical patent/CN101479533A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/025—Supply of secondary air for completing combustion of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/20—Ranges
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/04—Cyclic processes, e.g. alternate blast and run
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/22—Arrangements or dispositions of valves or flues
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/22—Arrangements or dispositions of valves or flues
    • C10J3/24—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed
    • C10J3/26—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed downwardly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/36—Combustion apparatus using only lump fuel characterised by the form of combustion chamber shaft-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B3/00—Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/06—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air into the fire bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/20—Ranges
    • F24B1/202—Ranges specially adapted for travelling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Incineration Of Waste (AREA)

Abstract

The invention relates to a solid fuel stove comprising a combustion chamber (12) for containing combustion fuel and a blower assembly (50) configured to provide airflow entering the combustion chamber in operating condition. When guiding means (40) establish airflow entering the combustion chamber substantially in a downwardly direction the combustion process of the stove is very clean and efficient.

Description

The solid fuel cooker of combustion modifications
Technical field
The present invention relates to the cooking furnace of combustion modifications.Particularly, the present invention relates in the combustion chamber, to come with compulsory air circulation the cooking furnace of buring solid fuel such as timber.
Background technology
The about 2,500,000,000 people's burn wood in the estimation whole world are cooked.The common efficient of known stove and process is low and have imperfect combustion, and this causes the volume of smoke discharging and the global warming process is worked.Annual many causing death can be owing to such polluted smoke emissions.In addition, thus inefficient timber stove uses more natural wood resources to cause forest harvesting.
When the family expenses combustion of wood, owing to air pollution appears in the imperfect combustion of the volatile matter that discharges from timber.Although under temperature low as room temperature, just discharge VOC from timber, only when exothermic reaction begins (250 ℃), just begin a large amount of quick release.Volatile matter forms the complex mixture of fuel gas.The ignition temperature of combustible gas mixture is about 600 ℃.The many unburned volatile matters that discharge from timber will concentrate the formation fine particles when being cooled near environment temperature.The wood-smoke that Here it is observes.Because some former thereby the imperfect combustion of volatile matter occurs.When adding boarding, cause very soon from timber from the heat of charcoal and utensil to discharge gas.When igniting, the paper of burning and fire-lighter provide this heat.If volatile matter is not exposed to high temperature source (flame or red-hot charcoal), thereby then they will can not ignite and upwards transmit along flue/chimney simply and pollute.If gas is ignited really, if then it is by cold surface (for example metallic walls of low temperature fire chamber) or the cooling of low-temperature burning air, it may extinguish so.If fuel gas does not mix with air (oxygen), then it can not burn.If reduce combustion air to slow down burn rate, then may not exist enough oxygen to carry out completing combustion.
GB 2125160 describes a kind of cooking furnace with combustion air chamber, and wherein by free convection or by manual air pump or the combination of the two, the air that will be used for burning from the outside of stove be drawn into the combustion air chamber.Air enters the combustion chamber by one or more hole of bottom, chamber.
Summary of the invention
The object of the present invention is to provide a kind of solid fuel cooker that allows clean combustion process.
According to the present invention, a kind of solid fuel timber stove is provided, this solid fuel timber stove comprises:
The combustion chamber is used for comprising combustion fuel, and this chamber has be used to the lower portion of holding fuel and has unlimited upper portion;
The hair-dryer assembly, configuration is in order to provide the air stream that enters the combustion chamber under operating condition;
Guiding device is in order to direct into air stream in the combustion chamber;
Wherein guiding device directs into lower portion with air stream from the upper portion that opens wide
Wherein a plurality of holes (23) that provide in the wall (21) of the upper portion (15) that opens wide of combustion chamber (12) are provided guiding device (40),
Wherein guiding device (40) is set up air stream in the lower portion of combustion chamber,
Wherein guiding device (40) is included in a plurality of holes (22) that the lower portion (17) of combustion chamber (12) is located, and
Wherein most of air enter through a plurality of holes (23) of locating at the upper portion (15) that opens wide.
According to stove of the present invention verified give a kind of very the cleaning combustion process.More the combustion process of cleaning reduces unwanted combustion gas such as carbon monoxide (CO) and the discharging of the VOC that concentrates.The specific airflow that guiding device produces allows the fuel gas completing combustion before finally leaving the combustion chamber in the hot chamber, therefore improves the cleannes of combustion process.When setting up in the combustion chamber laterally or make progress air stream, existence this kind air stream before fuel gas completing combustion causes that fuel gas goes out to outdoor risk.Reach the especially such situation of higher part timesharing of the relatively low combustion chamber of temperature when such gas.Air stream according to the present invention generates certain turbulent air mixture, and this is obviously very favourable with regard to completing combustion.For the fuel gas in the combustion chamber, exist the more time with completing combustion before finally leaving the combustion chamber.As everyone knows, completing combustion means clean burning.The level that shows residual smoke and volatile organic matter for the concrete measurement according to stove of the present invention reduces.Additional advantage is that flame will no longer contact the cooking container that is arranged on the stove, thereby allows the soot levels on the cooking container obviously to reduce.Guiding device can have the relative simple construction that the design that can not make stove complicates.Certainly except the hair-dryer assembly, other air source that can enter the combustion chamber is also arranged, the opening that passes through in (part) unlimited upper portion or the process lower portion by free convection such as air enters.If aflame air stream directs into lower portion from upper portion basically, then combustion process will clean very much, and some experiments have shown this point.
According to a preferred embodiment, guiding device is included in a plurality of holes that upper portion provides in the wall of combustion chamber.By the hole is provided, can obtain simple and easy and effective guiding device.The lower limb in hole is outward-dipping with respect to the combustion chamber if the top edge in hole slopes inwardly with respect to the combustion chamber, and is then especially preferred.This is configured in the situation of wall relative thin is favourable with regard to manufacturability, because make the wall distortion around being easier in the hole.In another preferred embodiment, the hole comprises the boring that has gradient for wall.Be easier in the relatively thick situation of such Kong Zaibi make.
In addition, if the hole then is preferred along the basically equably distribution of profile of combustion chamber.This has following advantage: air stream can meet in the central somewhere of combustion chamber relatively, and this causes turbulent air mixture and improves combustion process.
According to another preferred embodiment, guiding device is set up air stream in the lower portion of combustion chamber.For this reason guiding device preferably the lower portion in the combustion chamber comprise a plurality of holes.Test verifiedly, add air stream in the lower portion of combustion chamber and will help to gasify and usually be difficult to the composition such as the charcoal that gasify.This will be of value to combustion process.
When preheating chamber is arranged at around the combustion chamber, be preferred, air stream this preheating chamber provides from the hair-dryer assembly to the combustion chamber is communicated with, and comprise air distributor, this air distributor comprises and is suitable for the heat reflector that the heat with radiation spontaneous combustion chamber is reflected back towards the combustion chamber.Air distributor guides air stream and reflect heat is got back in the combustion chamber.The air that enters the combustion chamber is carried out preheating, and low temperature is safe so that contact is got up and outer surface keeps fully when operation.
In a preferred embodiment, be provided for driving the rechargeable power supply of hair-dryer assembly and thermoelectric unit is provided, wherein thermoelectric unit is configured to provide power to hair-dryer assembly and rechargeable power supply.This is for the connection that gives more freedom and the timber stove is not relied on to lead to main electrical network or lead to external cell for (electricity) power source that drives the hair-dryer assembly.In addition, especially in view of timber stove according to the present invention usually by rechargeable energy source (as starting battery) this fact of powering, very favourable with regard to overall power consumption.In non-in advance published application IB2006/050920, describe particularly a kind of timber stove with thermoelectric unit, incorporated the content of this application in this mode by reference into.
Will be understood that and to make up above-described embodiment or its each side.
Description of drawings
Now will be by example and embodiment with reference to the accompanying drawings to describe the present invention, in the accompanying drawings:
Fig. 1 shows the perspective view of the solid fuel cooker that is suitable for cooking;
Fig. 2 is the sectional view of interior details that schematically shows the stove of Fig. 1;
Fig. 3 shows the schematic side sectional view according to the line I-I among Fig. 2.
The specific embodiment
With reference to Fig. 1, solid fuel cooker 10 comprises it being columniform shell 11, combustion chamber 12 basically, and this combustion chamber is formed in the upper part of shell and has the upper portion 15 that usually opens wide as cooking surface.Usually the upper portion 15 that opens wide comprises for a plurality of support columns 13 that support cook utensil such as pan etc. at the top.Usually the upper portion 15 that opens wide can be to be covered by mesh, grid or other open design (not shown) at least in part, still allows efficient Waermeableitung on upward direction simultaneously for further supporting cooking container.Stove 10 preferably is positioned on the smooth and stable surface 5.
Relative with the upper portion 15 that opens wide, the lower portion 17 of combustion chamber 12 (among Fig. 1 shown in the dotted line) provides and holds solid-fuelled.No matter when need new fuel supply, fuel is upper portion 15 manual the inputs in the combustion chamber 12 through opening wide usually.It should be noted that here term ' upper portion ' and ' lower portion ' only be used for being positioned as shown in fig. 1 in the combustion chamber it normal setting operating position the time difference combustion chamber canonical dissection.
Shell 11 comprises that in its lower end for a succession of air intake 14 of introducing air, this air is used for the forced air convection through combustion chamber 12, and this will be described hereinafter.Therefore stove 10 is preferably Portable furnace, can have the following handle (not shown) that detachably holds, and this detachably holds handle can be attached to support (also not shown) on the shell 11.The a series of upper hole 23 of combustion chamber 12 also in Fig. 1 as seen.
Fig. 2 shows the internal placement of a preferred embodiment of stove 10.Inner cylindrical wall 21 limits combustion chamber 12.The guiding device 40 of combustion chamber 12 comprises a succession of lower hole or air outlet slit 22 and a succession of upper hole or air outlet slit 23.Upper hole is so shaped that the air in the flowing in combustion chamber guides from the upper portion guiding lower portion of opening wide or with respect to stayed surface 5 downwards.These holes produce at least from the airflow component of upper portion guiding lower portion.Except downward component, the air stream speed in the combustion chamber preferably also will have from the velocity component of wall 21 towards central authorities' guiding of chamber.
Considering to pass through respectively the air that upper hole and lower hole enter the combustion chamber, if most air enters through upper hole, then is preferred.A kind of favourable distribution shows as 75% air and enters through upper hole, and all the other 25% enter through lower holes.Can easily realize this point by the adequate rate that is chosen between bottom side portion and lower portion total hole surface separately.
12 outline becomes 2 row along the combustion chamber in upper hole 23.The hole of preferably, embarking on journey distributes basically equably along this profile.In addition, if the hole of two row all provides certain alternately perforation as shown in fig. 1 and more clearly as shown in Figure 2, then be preferred.With regard to the air of drawing from the combustion chamber, this has shown as is favourable.In addition, Kong Eryan as much as possible is just arranged in little surface, this is favourable.
The annular space 18 that serves as preheating chamber is formed between cylindrical wall 21 and the shell 11.Annular space is filled with air distributor 24, and this air distributor preferably includes a succession of cylindrical metal sheets 24a, and wherein punching rib 24b keeps interval between the sheet so that air duct to be provided.Sheet metal 24a guiding air stream and reflect heat got back in the combustion chamber 12, low temperature is safe in order to touch thereby the outer surface that preheating enters the air of combustion chamber through upper air outlet slit 23 and guarantees shell 11 keeps fully when operation.Cylindrical metal sheets is held in place by supporting construction 24c.
Be used for keeping solid-fuelled stayed surface 29 to be arranged at lower portion 27.
The normal combustion process of solia particle so that occur in the air stream in the combustion chamber.These particulates can be arbitrary class solid materials, but preferably use timber.The present invention does not relate to the combustion process of fluid bed type.
The base portion of cylindrical chamber 21 comprises the heat insulation structural 25 that serves as heat shielding, and this heat shielding reduces heat towards the medial compartment 26 of shell 11 and the downward radiation of lower chamber 27.Medial compartment 26 is separated by the wall 28 with opening (not shown) with lower chamber 27.Be adjacent to these holes hair-dryer assembly 50 is installed, this hair-dryer assembly preferably has central motor 52 and whole to extraradial blade 53, and these blades form in order to the impeller through the opening direct air in the wall 28.Preferably by another heat shield element 51 protections, this unit can be the thin layer that is arranged at the heat-reflecting material (such as aluminium foil) on the motor to central motor 52.Lower chamber 27 is by shell 11 limited ranges that comprise air intake 14.
In use, hair-dryer assembly 50 is blown into it in the medial compartment 26 through the opening that air intake 14 draws air and process wall 28.Medial compartment 26 serves as in order to air is fed to the distributor chamber in annular space 18 and the air distributor 24.Air flows to add hot-air and with lower air intake 22 and the upper air intake 23 of its oriented combustion chamber 12 between the sheet 24a of air distributor 24.
In one embodiment, hair-dryer assembly or fan 50 comprise the 1W brushless DC fan that is driven by 3V to the 7V power supply (not shown) with 5V motor compatibility.In another embodiment, fan is the 12V by 6V to 14V power drives.Power supply is normally installed battery from the inside that the base portion of stove can be taken.Replace, no matter when available, can use external power source.Test has shown that stove 11 can boil a premium on currency in 4 minutes and without obviously cigarette ash and flue dust, wherein ignition temperature is greater than 1000 ℃.Food can be stewed in the low voltage scope and boils or boil in the high voltage scope, and good culinary art control is provided thus.
Medial compartment 26 preferably has thermoelectric unit 31, and this unit has the first active surface of close combustion chamber 12 and locates in order to receive the second active surface of low-temperature airflows from hair-dryer assembly 50.Shown in the preferred arrangements, the second active surface of thermoelectric unit with arranged that by fan-cooled radiator 32 direct heat are related or form the part that this radiator is arranged.The first active surface of thermoelectric unit can closely directly contact with lower wall or the isolation structure 25 of combustion chamber 12.Thermoelectric unit 31 can embed in the isolation structure 25 to be increased in the available temperature in the first active surface.In view of the heat shielding effect of thermoelectric unit 31 and radiator 32, with regard to this layout, can not need the independent heat shielding for motor 52.
Thermoelectric unit 31 is any suitable devices that thermal power transfer become electric energy, such as hot coupling or amber ear note (Peltier) unit.Such thermoelectric unit comes formation voltage based on the thermal gradient of striding device between its first active surface and the second active surface routinely.Thermoelectric unit provides electrical power to hair-dryer assembly 50.In use, hair-dryer assembly 50 provides air stream to radiator 32 and thermoelectric unit 31 and to air distributor 24.In this way, the second active surface of thermoelectric unit is maintained at than significantly lower temperature in other situations in addition, and this has increased the available horsepower output from this unit, and therefore increases the available air stream of going to combustion chamber 12.
Electronic control unit 33 control hair-dryer assemblies or fan and also be contained in the lower chamber 27 wherein also protect this unit to avoid the heat of stove in this time chamber.Electronic control unit 33 comprises that rechargeable battery and configuration are in order to operate the controller of stove.Thermoelectric unit provides electrical power to fan 50 and rechargeable battery, extends the life of a cell thus.In a preferred embodiment, electronic control unit is suitable for every kind of enabled mode of automatic sequential traversal timber stove, such as start or shutdown mode.Preferably, electronic control unit is adjusted subsequent step according to the operating condition of sensing such as the heat of stove fire.The temperature sensor (not shown) can be used for determining calory burning, perhaps can export to infer this heat according to the electricity of thermoelectric unit 31.
Rechargeable battery only is used for supplying power usually in start-up phase.When normal operating, then battery can recharge usefulness for next time start fully by thermoelectric unit.
Fig. 3 shows the cross section according to the line I-I among Fig. 2, and this cross section more specifically shows one of hole.The top edge 61 that it shows particularly the part of cylindrical wall and illustrates the hole slopes inwardly with respect to the combustion chamber.Lower limb 62 is outward-dipping with respect to the combustion chamber.Preferably, cylindrical wall comprises heat resistant metallic sheet such as stainless steel.This any air stream that allows to enter through via hole will be directed downwardly, namely from its lower portion of upper portion guiding of combustion chamber.This is especially favourable in the situation of wall relative thin, wherein is easier in the hole make the wall distortion on every side.When wall thicker the time, the hole can comprise the boring that has gradient with respect to wall.In this case, the wall of combustion chamber will keep smooth basically.
An alternative advantageous embodiment is to have the guiding device that comprises nozzle, and these nozzles have the outlet that is directed to lower portion from upper portion.The outlet of nozzle can extend past the wall of combustion chamber.Replace, such nozzle can be arranged in beyond the combustion chamber at the upper portion of combustion chamber.
When the air stream A among Fig. 3 runs into the air stream B that flows through relative opening, two air streams will influence each other and produce simultaneously the turbulent air mixture that is considered as being configured as anchor ring.Experiment has shown that this air stream works to the combustion process that more cleans significantly.
That instrument such as Metallic rod are pierced through the hole with straight flange in order to the easy means that produces hole shown in Fig. 3.The Shear tool subsequently, and the part beyond in the combustion chamber is inclined upwardly.Make the edge plastic deformation in hole with this.Preferably, the diameter of Metallic rod is slightly less than the diameter in hole.This provides a kind of simple and easy and reliable fashion that produces appropriate well.
In order to produce required air stream, the specific dimensions in hole and number are preferred.Consider the fact that stove is intended for cooking, the scope of the thermal power of wanting is 2-5kW.This so determine burn rate take gram timber per minute as unit.This and then definite required air flow.Very a large amount of air residues are used for guaranteeing clean burning.Find that after careful experiment scope that required air flows is for regard to 100 liter/mins of clocks with regard to the low-power setting and 200 liter/mins of clocks with regard to the high power setting.About 75% air is as secondary combustion air.
The macropore of a large amount of aperture small amounts is preferred.Find that the hole that 64 diameters are 2.5mm is optimum.
Find to use 32 holes of two row of several millimeters of vertically dislocation that ignition quality is had a little improvement.Each row is arranged in upper portion at a distance of a certain distance.Preferably, two row are arranged with alternate configurations.This layout shows as and realizes that fuel gas mixes with the better of available air.The typical external dimensions of timber stove is 30 centimetres height and 20 centimetres diameter.
Timber stove according to the present invention is applied to household usually, wherein benefits from the combustion process of cleaning.Yet the timber stove also can be applied to outdoor, such as using in the process of camping, because it can operate by (rechargeable) battery usually.Another may application be the disaster area, at this moment people just (promptly) cook and heat with regard to the fire that need to be easy to set up.
A remarkable advantage of above-mentioned stove design is to protect fully fan to avoid the impact of direct heat source; can use the low-cost motor of the large-scale production with plastic components; even motor is positioned over and combustion chamber short distance place, also is so, thereby realizes compact stove.Such motor also proves more reliable and has longer projected life.Motor is positioned to supply means in the air stream that motor is from cooling, and also can be used for expediently the low temperature side of cooling electric hot cell.
Although illustrate particularly and described the present invention in accompanying drawing and preamble description, such diagram and description should be considered as explanation or give an example rather than restriction; The invention is not restricted to disclosed embodiment.Those skilled in the art are according to claimed other distortion that is appreciated that and realizes when of the present invention disclosed embodiment is being implemented in the research of accompanying drawing, disclosure and appended claims.In the claims, wording " comprises " does not get rid of other unit or step, and that indefinite article "/a kind of " is not got rid of is a plurality of/and multiple.Single processor or other unit can be implemented in the several functions of putting down in writing in the claim.The name fact of some measure of record in mutually different dependent claims does not show the combination that can not advantageously use these measures.Any label in the claims should not be construed as limited field.
The present invention relates to a kind of solid fuel cooker, this solid fuel cooker comprises be used to the combustion chamber that comprises combustion fuel (12) and disposes in order to the hair-dryer assembly (50) of the air stream that enters the combustion chamber to be provided under operating condition.When guiding device (40) is set up basically when downward direction enters the air stream of combustion chamber, the combustion process of stove clean very much and efficient high.

Claims (8)

1. a solid fuel cooker (10) comprising:
Combustion chamber (12) is used for comprising combustion fuel, and described chamber has be used to the lower portion of holding fuel (17) and has unlimited upper portion (15);
Hair-dryer assembly (50), configuration is in order to provide the air stream that enters described combustion chamber under operating condition;
Guiding device (40) is in order to direct into described air stream in the described combustion chamber;
Wherein said guiding device (40) directs into described lower portion with described air stream from described unlimited upper portion
The a plurality of holes (23) that provide in the wall (21) of the upper portion (15) that opens wide of described combustion chamber (12) are provided wherein said guiding device (40),
Wherein said guiding device (40) is set up air stream in the lower portion of described combustion chamber,
Wherein said guiding device (40) is included in a plurality of holes (22) that the lower portion (17) of described combustion chamber (12) is located, and
Wherein most of air enter through a plurality of holes (23) of locating at the upper portion (15) that opens wide.
2. stove as claimed in claim 1 (10), the top edge of its mesopore (61) slopes inwardly with respect to described combustion chamber (12), and the lower limb in hole (63) is outward-dipping with respect to described combustion chamber.
3. stove as claimed in claim 1 (10), wherein said hole (23) comprise the boring that has gradient with respect to described wall (21).
4. stove as claimed in claim 1 (10), wherein said hole (23) distribute basically equably along the profile of described combustion chamber.
5. stove as claimed in claim 1 (10), wherein preheating chamber (18) is arranged at around the described combustion chamber, air stream described preheating chamber (18) provides from described hair-dryer assembly to described combustion chamber is communicated with, and comprise air distributor (24), described air distributor comprises and is suitable for heat reflector (14a) that the heat of radiation from described combustion chamber (12) is reflected back towards described combustion chamber.
6. stove as claimed in claim 1 (10), wherein be provided for driving the rechargeable power supply of described hair-dryer assembly and thermoelectric unit (31) is provided, and wherein said thermoelectric unit is configured to provide power to described hair-dryer assembly and described rechargeable power supply.
7. stove as claimed in claim 1 (10), wherein said hair-dryer assembly (50) comprise dc brushless motor (52) and the impeller (53) of coupling with it.
8. stove as claimed in claim 1 (10) wherein provides electronic control unit (33), and described unit is suitable for to described hair-dryer assembly (50) supply variable drive power to control the ignition temperature in the described stove.
CN2007800239701A 2006-06-26 2007-06-20 A solid fuel stove with improved combustion Expired - Fee Related CN101479533B (en)

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PCT/IB2007/052373 WO2008001276A2 (en) 2006-06-26 2007-06-20 A solid fuel stove with improved combustion

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RU2009102232A (en) 2010-08-10
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WO2008001276A2 (en) 2008-01-03
AP2535A (en) 2012-12-19
BRPI0713368A8 (en) 2015-10-13
JP2009541710A (en) 2009-11-26
EP2035751A2 (en) 2009-03-18
CA2656187A1 (en) 2008-01-03
JP5938455B2 (en) 2016-06-22
BRPI0713368A2 (en) 2012-03-13
AP2009004748A0 (en) 2009-02-28
KR20090026194A (en) 2009-03-11
ZA200900557B (en) 2010-03-31
CN101479533A (en) 2009-07-08
US20090165769A1 (en) 2009-07-02
JP2015014453A (en) 2015-01-22
RU2436015C2 (en) 2011-12-10
KR101423479B1 (en) 2014-07-28
MA30538B1 (en) 2009-06-01
EG26627A (en) 2014-04-13

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