Picnic stove
Technical field
The present invention relates to a kind of picnic stove, be specifically related to a kind of horizontal air inlet and there is inside and outside double-deck picnic stove.
Background technology
Picnic stove is people's standing cooking utensils of picnicing of going out, and becoming in recent years many consumers, to make earnest efforts the safari suit bought standby, and the picnic stove of design small volume and less weight, safety and environmental protection becomes the focus that businessman falls over each other developmental research.Current, to compare with the Novel furnace that relies on solar energy heating, the picnic stove that uses naked light to cook is simple in structure with it, heating remains popular the most general selection fast.Chinese utility model patent " one lights picnic stove " (Granted publication CN2126385U) discloses a kind of picnic stove, comprise a furnace shell, in furnace shell, be set with the muff that refractory material is made, in muff, be placed with ignited briquet, there is the little portable advantage of volume.Because this picnic stove in use must assembling coal combustion, after coal combustion exhausts, cannot be with the replacement of other fuel, limited picnic stove spendable feature all whenever and wherever possible.And use in the wild while picnicing stove, people more wish to gather materials on the spot and select leaf, branch etc. as fuel, to remove the trouble of carrying fuel from, have also saved the energy simultaneously.The problem that the living beings such as branch of usining run into often as fuel has that fuel combustion is insufficient, easy flame-out, over-emitting black exhaust etc., addresses this problem and normally on body of heater, designs air inlet.Chinese utility model patent " wind-proof type living beings picnic furnace " (Granted publication CN202813447U) discloses a kind of picnic furnace, in lower furnace portion, fire grate is set, on the bottom perisporium of body of heater shell, fresh air inlet is set or bottom is provided with stove pin, the air intake mode of this structure is undergrate blast, lower furnace portion arranges fire grate, the fuel that combustion air is from bottom to top flowed through and burnt, the ashes of burning leak down to be deposited in stove bottom from fire grate simultaneously.This design has improved the efficiency of combustion of fuel to a certain extent, but also has following defect: 1, burner hearth bottom arranges fire grate, is difficult to preserve the fire in a stove before fuel is added, flame-out taking place frequently in use procedure; 2, after burned for long time, a certain amount of ashes can be gathered in fire grate bottom, and the air draught pouring into from bottom easily causes flying dust; 3, the size due to air draught is to depend on natural wind, and the intensity of natural wind is unsettled, is unfavorable for that fuel keeps efficient efficiency of combustion constantly.In addition, due to picnic stove environment for use be generally spacious open air, the heat exchange between stove and surrounding enviroment also loss a large amount of calory burnings, how to reduce picnic stove heat loss be also problem in the urgent need to address.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of flame-out, the abundant picnic stove that can avoid again flying dust simultaneously of fuel combustion that is difficult for for above-mentioned prior art.
Another technical problem to be solved by this invention is to provide a kind of picnic stove that can effectively improve calory burning utilization rate for above-mentioned prior art.
The present invention addresses the above problem adopted technical scheme: a kind of picnic stove, include body of heater and be enclosed within the flue in body of heater, between the bottom of described flue and the bottom of body of heater, there is certain distance, it is characterized in that: the bottom of described flue seals, open top and being connected with body of heater top seal, is formed with air flow lumen between the side of described flue and body of heater; On the bottom perisporium of described flue, be provided with several fresh air inlets, the height of described fresh air inlet and flue bottom maintain a certain distance; And be provided with air is blasted in described air flow lumen and makes air laterally enter into the air blast of described flue inside in the bottom of described body of heater.
Preferred scheme is that described fresh air inlet is circumferentially uniform along flue, and the circle that at least distributes, and guarantees that combustion air enters into flue inside equably from flue surrounding, and fuel is fully burned.
Such scheme further preferably, is provided with several benefit wind fresh air inlets on the top perisporium of described flue, circumferentially uniform along flue, and the circle that at least distributes respectively.When the disposable fuel overfill adding, the air admission hole of flue bottom is easily stopped up from inside by fuel, or after burning for a long time, air admission hole is easily stopped up by dust stratification, and now combustion air is difficult to enter flue inside from air admission hole.By arranging, mend wind fresh air inlet, can, to the required oxygen that burns of by-carriage in flue, guarantee that burning can continue, and has avoided the consequence of fuel because of insufficient over-emitting black exhaust that burns.
Preferably, the perisporium of described body of heater is provided with heat-insulation layer.The arranging of insulating layer of furnace body can be reduced the heat exchange of picnic stove and external environment, the utilization rate of the raising combustion heat effectively; In addition, heat-insulation layer is set and can makes the air in air flow lumen obtain preheating, the air of preheating can improve the temperature of combustion flame, thereby shortens the time of culinary art.
Picnic stove in use for some time, the temperature of flue can raise, especially at furnace body inside, arrange after heat-insulation layer, a large amount of heat accumulations is inner at body of heater, hot environment is totally unfavorable to the normal operation of air blast, in order to guarantee that air blast can normal operation, the further preferred scheme of the present invention is that body of heater inside is provided with and is positioned at the top of described air blast, the thermal insulation board of the below of flue, and this thermal insulation board and described air blast, the certain spacing of flue bottom maintenance; On described thermal insulation board, have several through holes of allowing circulation of air, described through hole is circumferentially uniform along the center of thermal insulation board.By thermal insulation board is set, thermal source flue and air blast are kept apart, guaranteed that air blast can not stop running because of hot environment.In addition, under the prerequisite without prejudice to inventive concept, thermal insulation board can also be designed to other structures, as grid structure.
Concrete, the opening edge of described flue is along being arranged to outside flange, and described flue rides over body of heater top by flange, and makes to be tightly connected between described flue top and body of heater top.The combustion air being blasted by air blast so can be not excessive from Air Flow top of chamber, and enter in flue as much as possible.
Preferably, in order further to improve the thermal efficiency of flame, to add thermal-flame puts together, the upper end of described flue opening is provided with flame-gathering cover, this flame-gathering cover be up and down communicate, up-small and down-big bullet, flame-gathering cover upper end is crater, and lower end is for gathering burner, and the bore of poly-burner is more than or equal to the bore of flue opening.
The design coordinating with flame-gathering cover is, described body of heater top is provided with pan support, and the bearing height of this pan support is greater than the crater height of described flame-gathering cover.
Concrete, described bottom of furnace body is provided with stove pin, or described upper of furnace body is provided with three-legged support, and three-legged support top is provided with the bracing ring that supports body of heater.Between body of heater and ground, just can maintain a certain distance like this, the air blast of being convenient to bottom of furnace body constantly blasts combustion air in air flow lumen from picnic furnace bottom in a steady stream.
Compared with prior art, the invention has the advantages that: because the bottom of flue seals, the height of the enterprising pore of flue and furnace bottom maintain certain distance, be different from bottom air inlet, in the present invention, combustion air is laterally to enter in flue from the air admission hole of flue bottom, avoid combustion air directly to contact with flue bottom single spark, be conducive to preserve to greatest extent the fire in a stove before fuel is added, facilitated secondary to ignite.In addition, the picnic stove of this structure, the ashes that flue internal combustion produces be Direct precipitation in flue bottom, can not spill body of heater outside, be combustion air current or naturally blow and can not cause flying dust phenomenon, protected environmental sanitation.At bottom of furnace body, be provided with air blast, do not need to rely on natural wind and can obtain stable combustion air, be conducive to constantly keep the efficiency of combustion of fuel.To sum up, picnic stove of the present invention has been realized and has been difficult for flame-out, fuel combustion and fully can avoids the object of flying dust again simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the tripod picnic stove of the embodiment of the present invention.
Fig. 2 is the use schematic diagram of the picnic stove of another embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Figure 1, the picnic furnace structure in the present embodiment includes body of heater 1 and is enclosed within the flue 3 of body of heater inside, between the bottom of flue and the bottom of body of heater, has certain distance; The bottom of flue 3 seals, open top, and outside flange 31 is arranged at the edge of opening, and flue rides over body of heater top by flange, and flue top is connected with body of heater top seal by this flange.Combustion air can be not excessive from top like this, and enter in flue as much as possible.And the external diameter of flue 3 is less than the internal diameter of body of heater 1, between the side of flue and body of heater, be formed with air flow lumen 5; On the bottom perisporium of described flue, be provided with the several fresh air inlets 6 that are uniformly distributed circumferentially, the height of described fresh air inlet and flue bottom maintain a certain distance; In this embodiment, on the top perisporium of flue, be also provided with several benefit wind fresh air inlets 4, respectively circumferentially uniform along flue.
The bottom of body of heater is provided with air blast 8, and air enters in air flow lumen by air blast, via fresh air inlet, enters flue inside.The perisporium of body of heater is provided with heat-insulation layer 2, the combustion air in can preheated air flow cavity 5 when reducing heat loss.Described body of heater inside is provided with the thermal insulation board 7 that air blast 8 and flue 3 bottoms are separated simultaneously, and thermal insulation board is positioned at the top of air blast, the below of flue, and all keeps certain spacing; On described thermal insulation board 7, have several through holes 71 of allowing circulation of air, described through hole is circumferentially uniform along the center of thermal insulation board.
In this embodiment, the upper end of described flue opening is provided with flame-gathering cover 9, this flame-gathering cover be up and down communicate, up-small and down-big bullet, the upper end of described flame-gathering cover is crater, lower end is poly-burner, and the bore of poly-burner is more than or equal to the bore of flue opening.At body of heater top, pan support 10 is also installed, the bearing height of this pan support is greater than the crater height of described flame-gathering cover 9.For coordinating air blast operation, body of heater need maintain a certain distance with ground, and body of heater is provided with three-legged support 11, three-legged support top is the bracing ring of support body of heater, or stove pin 12 is set below body of heater, as shown in Figure 2, support whole body of heater, be convenient to air blast and blast combustion air from bottom.
While using picnic stove of the present invention to cook, in from flame-gathering cover to flue, drop into the fuel of lighting in advance, open air blast, combustion air is blasted in body of heater, through hole on thermal insulation board enters the air flow lumen between flue and body of heater, accumulate to certain pressure and laterally enter flue inside by the air admission hole by flue side (with mending wind air admission hole), the oxygen that aftercombustion is required, guarantees the abundant burning of fuel.And owing to having certain distance between flue bottom and air admission hole, the ashes that burning produces are deposited on flue bottom, have avoided flying dust, have farthest preserved the fire in a stove before fuel is added simultaneously, again light use when facilitating continuous bavin.Heat-insulation layer on body of heater perisporium has reduced the combustion heat loss of picnic stove, and after burning a period of time, the air in air flow lumen has also obtained preheating, has improved the thermal efficiency of flame.Further, the flame-gathering cover of flue open upper end is gathered the flame of dispersion, has concentrated firepower, has shortened cooking time.In combustion process, can from flame-gathering cover, fill into fuel at any time, the fire in a stove before fuel is added that preserve flue bottom is convenient to secondary and is ignited and avoided flame-out.After picnic stove uses, treat that body of heater is completely cooling, flue is taken out to deashing.Picnic stove of the present invention has really met the requirement that sufficient combustion, the thermal efficiency are high, be difficult for flame-out and environmentally-friendly sanitary.
The foregoing is only the preferred embodiment of the present invention; for a person skilled in the art; do not departing under principle of the present invention; can also make multiple improvement to the structure of picnic stove; for example air blast is located to body of heater outside; at bottom of furnace body, blast channel is set, by blast pipe, the air outlet of air blast is connected with blast channel, the distortion of this class formation also all should be considered as in protection scope of the present invention.