TWM529830U - Portable biofuel stove - Google Patents

Description

Portable raw fuel furnace

The present invention relates to a combustion furnace, and more particularly to a portable biomass fuel furnace capable of effectively improving combustion efficiency.

A portable wood gas stove disclosed in Chinese Utility Model Patent No. CN203980352U, which comprises an inner cylinder seat, an outer cylinder seat, and a seal extending from the top of the inner cylinder base to the top of the outer cylinder base. The inner cylinder base includes an inner cylinder defining a combustion space, and a plurality of through holes extending radially through the inner cylinder. The outer cylinder base includes an outer cylinder surrounding the inner cylinder, and a plurality of air inlets penetrating the outer cylinder and located below the inner cylinder. The inner and outer cylinder bases and the sealing member cooperate to define a sandwich space communicating with the combustion space and the through holes, and the interlayer space can be divided into a wood gas flow path surrounding the outer peripheral surface of the inner cylinder And a secondary mezzanine space connecting the bottom end of the wood gas flow passage.

In use, the wood gas generated by the Dry Distillation of the biomass fuel in the combustion space flows into the wood gas flow passage through the through holes and follows the The combustion-supporting gas flowing into the gas port flows upward through the through holes adjacent to the sealing member and then flows into the combustion space to perform a secondary combustion operation.

Since the inner and outer cylinder bases of the portable wood gas stove are usually made of a metal material, the heat of the metal is small, so that the heat is also fast. Therefore, it can be understood that the wood gas flowing in the wood gas flow passage is the same. The thermal energy may not be insulated due to the fact that the inner and outer cylinders are easy to dissipate heat, so that the wood gas can not easily reach the ignition temperature due to the temperature drop, thereby allowing the portable wood gas stove to be used. There are shortcomings that are easy to waste fuel, resulting in poor combustion performance and insufficient firepower.

It should also be noted that although such a portable wood gas stove is provided with an electric air blowing device in the interlayer space, it should have the function of increasing the combustion gas, but since the portable wood gas furnace does not have a guide The fuel gas is smoothly flowed to the flow guiding member of the wood gas flow passage. Therefore, the combustion-supporting gas that accelerates the flow through the electric air blowing device will arbitrarily arbitrarily hit the outer and inner cylinder bases, thereby generating The phenomenon of local turbulence is not conducive to the smooth flow of the subsequent combustion gas to the wood gas flow channel, so that the portable wood gas furnace essentially has the defect that the intake air amount of the combustion-supporting gas cannot be effectively increased.

Accordingly, it is an object of the present invention to provide a portable biomass fuel furnace that can efficiently use fuel to improve combustion efficiency.

Thus, the novel portable biofuel furnace comprises a barrel unit and a holding unit.

The base unit includes an inner cylinder seat and a set of outer cylinder bases disposed outside the inner cylinder base, and the top of the inner cylinder base and the top of the outer cylinder base are in close contact with each other.

The inner cylinder block includes an inner cylinder body defining a combustion space, a plurality of upper flame holes radially extending through the inner cylinder body, and a plurality of lower smoke holes radially extending through the inner cylinder body and located below the upper flame holes . The outer cylinder base includes an outer cylinder surrounding the inner cylinder, and an air inlet extending through the outer cylinder and located below the inner cylinder. The inner and outer cylinder seats cooperate to define a sandwich space.

The thermal insulation unit can be disposed at least one of the outer circumferential surface of the outer cylinder base and the interlayer space. When the thermal insulation unit is located in the interlayer space, the thermal insulation unit surrounds the inner cylinder and defines a combustion space. And the heat-insulating space in which the upper flame hole and the lower smoke hole communicate with each other, wherein the wood gas generated after the dry distillation of the raw fuel in the combustion space passes through the lower smoke hole and follows The combustion-supporting gas flowing into the air inlet flows upward from the bottom end of the heat-insulating space, and then flows into the combustion space through the upper flame holes for secondary combustion.

The utility model has the function of the thermal insulation unit, which has the design of the thermal insulation unit, thereby heating the wood gas and the combustion-supporting gas to achieve a faster ignition point, so that the fuel can be used more efficiently to achieve improved combustion efficiency. the goal of.

Referring to FIG. 1 to FIG. 3, an embodiment of the portable biomass fuel furnace 100 of the present invention comprises a barrel unit 1, a holding unit 2, a gas increasing unit 3, a flow guiding unit 4, and a diffusion seat 5.

The base unit 1 includes an inner cylinder base 11 and a set of outer cylinder bases 12 disposed outside the inner cylinder base 11, and the tops of the inner cylinder bases 11 and the tops of the outer cylinder bases 12 are in close contact with each other. In the present embodiment, the inner cylinder base 11 has a seal 13 extending to the outer cylinder base 12.

The inner cylinder block 11 includes an inner cylinder 111 defining a combustion space 90, a plurality of upper flame holes 112 radially extending through the inner cylinder 111, and a plurality of radial holes extending through the inner cylinder 111 and located on the upper flame. The lower smoke hole 113 below the hole 112. The outer cylinder base 12 includes an outer cylinder 121 surrounding the inner cylinder 111, and an air inlet 122 extending through the outer cylinder 121 and below the inner cylinder 111. In this embodiment, the outer cylinder 121 has a hollow body portion 123 and a cylinder cover portion 124 that is disposed at a bottom end of the tubular portion 123. The air inlet 122 can be formed in the cylinder. The cover portion 124 flows in to assist the combustion gas. It should be noted that a plurality of support members 8 (shown in FIG. 4) can also be disposed at the bottom of the outer cylinder base 12, thereby allowing more combustion gas to smoothly flow from the outside of the outer cylinder base 12 to the air inlet 122. It is also worth mentioning that the outer cylinder base 12 can also include a plurality of air inlets extending radially through the tubular body portion 123 of the outer cylinder 121 and located below the inner cylinder 111. It should be understood that as long as The same purpose and effect can be achieved by allowing the combustion gas to flow through the air inlet. Therefore, the position and number of the air inlet 122 need not be particularly limited to the embodiment.

The inner and outer sleeves 11, 12 and the sealing member 13 cooperate to define a sandwich space 91. In addition, the sealing member 13 needs to be tightly matched with the outer cylinder 121 to avoid gas. Leak out and take away heat. It is also worth mentioning that the portable biomass fuel furnace 100 can further include a grid 6 detachably disposed between the upper cylinder block 11 and between the upper flame holes 112 and the lower smoke holes 113. . The grid 6 includes a disk body 61 and a plurality of meshes 62 extending through the disk body 61. The novel has the design of the grid 6 to prevent the raw fuel (such as wood) located in the combustion space 90 from blocking the lower smoke holes 113, thus effectively preventing the gas from flowing smoothly, and because the net The frame 6 is detachably provided to the inner cylinder block 11, so the present invention also has the advantage of being easy to clean.

The heat retention unit 2 can be disposed on the outer circumferential surface of the outer cylinder block 12 and at least one of the interlayer spaces 91. When the outer peripheral surface of the outer cylinder block 12 is located, the heat insulating unit 2 can be used to prevent heat energy from being transmitted outward through the outer cylinder base 12. In this embodiment, the thermal insulation unit 2 is located in the interlayer space 91 and surrounds the inner cylinder 111 and defines a heat insulation connection with the combustion space 90, the upper flame holes 112 and the lower smoke holes 113. Space 92.

Referring to FIG. 3 and FIG. 7 , the heat preservation unit 2 includes a heat insulating material 21 disposed around an axis L1 and disposed on an inner circumferential surface of the outer cylinder 121 , and surrounding the axis L1 and interposed between the heat insulating material 21 and the The main reflector 22 between the inner cylinders 111 and the ring seat 23 surrounding the axis L1 and interposed between the main reflector 22 and the inner cylinder 111, respectively.

In the present embodiment, the heat insulating material 21 of the heat retention unit 2 is fibrous. The material of the main reflector 22 has a melting point of at least 1000 degrees Celsius. Specifically, the main reflector 22 can be a copper foil, and the surface of the main reflector 22 has a smooth design, which can also help reduce The resistance encountered when the gas flows. Since the main heat transmission path is transmitted in the form of convection, conduction, and radiation, the present invention has the design of the heat insulating material 21 and the main reflection member 22, thereby effectively reducing the conduction of thermal energy from the inner cylinder 111 to the The outer cylinder 121, and the case where heat energy is prevented from being dissipated from the inner cylinder 111 toward the outer cylinder 121 in the form of radiation, thereby maintaining thermal energy so as to easily reach the ignition temperature required for combustion.

The ring seats 23 are located between the upper flame holes 112 and the lower smoke holes 113. Each of the ring seats 23 has a ring body 231 and a plurality of splitter bodies 232 that connect one of the inner and outer peripheral faces of the ring body 231, as shown in FIG. Preferably, the ring seat 23 further has a plurality of positioning members 233 connected to the ring body 231. The splitter bodies 232 are located on the inner circumferential surface of the ring body 231, and the positioning members 233 are located in the ring. The outer peripheral surface of the body 231 can be positioned on the heat insulating material 21 through the main reflector 22 as shown in FIG.

It is worth mentioning that each ring seat 23 can be formed by an original strip-shaped base body, and the two ends of the base body are wound together to form the ring body 231. Preferably, one end of the base has a latching groove 234, and the other end of the base has an engaging portion 235 which can be inserted through the latching groove 234, as shown in FIG. The splitter bodies 232 are foldably disposed on the ring body 231, wherein the two-way splitter bodies 232 and the inner cylinders 111 can cooperate with each other to define an oblique passage. In addition, the ring seats 23 are made of a metal material. Therefore, when the ring seats 23 are accommodated in the heat insulating space 92, the ring seats 23 automatically absorb heat energy and pass the same. The gas of the ring seat 23 is heated, so that the effect of preheating the gas can be achieved.

It is also worth mentioning that the number of the ring seats 23 of the thermal insulation unit 2 of the present invention can also be only one, so that the same purpose and effect can be achieved. It is also noted that the thermal insulation unit 2 can also be designed with a vacuum thermal insulation structure. For example, the thermal insulation unit 2 can be a ring member having a vacuum layer interposed therebetween.

The air entraining unit 3 is located in the sandwich space 91 and is disposed in the cylinder cover portion 124 of the outer cylinder base 12. The gas-increasing unit 3 includes a mandrel 31, a peripheral wall 32 surrounding the mandrel 31, and a plurality of blades 33 disposed on the mandrel 31. It is worth mentioning that the air-enhanced unit 3 can also adopt a fanless fan without a fan blade design, as long as it can help to transport the combustion-supporting gas to the heat-insulating space 92 in a large amount of time, without special restrictions. The gas-increasing unit 3 must have a plurality of blades 33.

Referring to FIG. 1 , FIG. 3 and FIG. 4 , the flow guiding unit 4 is disposed between the outer and inner cylinders 121 , 111 and connects the air entraining unit 3 and the thermal insulation unit 2 , and includes a heating unit 2 . An outer cover 41 extending downwardly and having an outer diameter tapered and hollow, and an inner cover 42 located inside the outer cover 41.

The outer cover 41 has a bowl-shaped outer ring wall 411 and an air inlet port 412 defined by the bottom edge of the outer ring wall 411. The inner cover 42 has a bottom wall 421 and an inner ring wall 422 extending upward from the periphery of the bottom wall 421 and having an outer diameter that is gradually enlarged. In this embodiment, the outer diameter of the mandrel 31 of the air entraining unit 3 is substantially equal to the outer diameter of the bottom wall 421 of the inner cover 42 , and the top edge of the peripheral wall 32 of the air entraining unit 3 can be connected. The bottom edge of the outer ring wall 411 of the outer cover seat 41.

In the present embodiment, the outer and inner casings 41, 42 cooperate to define a flow guiding section 43 which is narrower in width and width. The flow guiding section 43 has a neck section 431 adjacent to the lower smoke holes 113 and communicating with the heat insulating space 92. Further, the heat insulating space 92 has a sectional area larger than the sectional area of the neck section 431, according to Bernoulli's theorem (Bernoulli's Theorem), when the combustion-supporting gas continuously flows from the flow guiding section 43 to the heat-insulating space 92, the neck section 431 becomes a low-pressure zone, so that it is generated in the combustion space 90 and adjacent to the lower smoke holes 113. The wood gas is continuously sucked into the heat insulating space 92 by the negative pressure, and then flows upward with the combustion-supporting gas as indicated by the dotted arrows in Figs. 3 and 4.

In this embodiment, the thermal insulation unit 2 further includes a secondary heat insulating material 24 between the inner cylinder 111 and the inner casing 42 of the flow guiding unit 4, and a secondary heat insulating material 24 and The secondary reflector 25 between the inner cylinders 111. Specifically, the secondary reflector 25 can be one of a copper foil and an aluminum foil. The heat insulating material 24 is mainly used to prevent heat generated in the combustion space 90 from being transmitted to the gas boosting unit 3 to extend the life of the gas boosting unit 3.

The diffusion seat 5 is provided in the holder unit 1 and has a hollow shape. The diffusion seat 5 includes an outer ring portion 51 disposed on the inner cylinder 111, an inner ring portion 52 extending from the outer ring portion 51 toward the combustion space 90, and a plurality of slots formed in the inner ring portion 52. 53. The diffuser 5 and the inner cylinder 111 cooperate to define a wood gas retention zone 54 adjacent the upper flame apertures 112. It should be noted that, as seen from the side view of the cross section (as shown in FIG. 3 ), the inner ring portion 52 of the diffuser seat 5 can be disposed at an acute angle with the inner cylinder 111, but may not be limited by the acute angle setting. Alternatively, the inner ring portion 52 of the diffuser 5 and the inner cylinder 111 may be disposed at an obtuse angle to each other. The novel has the design of the wood gas retention zone 54 which can help prevent the wood gas and the combustion-supporting gas which have been uniformly mixed with each other from directly escaping into the air, by allowing the fully mixed wood gas and the combustion-supporting gas to reach a short stay. The phenomenon provides sufficient flammable and combustion-supporting materials, which can help to improve the combustion efficiency of the new model.

In use, the wood gas generated by the dry distillation of the biomass fuel located in the combustion space 90 passes through the lower smoke holes 113 and is accompanied by the combustion gas flowing in from the air inlet 122. The bottom end of the heat insulating space 92 flows upward. Since each ring seat 23 of the present invention has the design of the splitter bodies 232, the wood gas and the combustion-supporting gas flowing through the heat-insulating space 92 can be passed through the oblique passages in a spiral manner. Slowly rising, the present invention can extend the gas staying in the insulated space 92 by changing the direction of gas flow compared to a conventional portable wood gas furnace that does not have the ring seats 23 and can only allow gas to flow in a vertical direction. The time inside, which further allows the wood gas and the combustion gas to be more evenly mixed with each other. It is also worth mentioning that each ring seat 23 of the present invention has the design of the splitter bodies 232, and can also generate local mixed flow at the periphery of the splitter bodies 232 to help the wood gas and the combustion gas. Mix more fully. Finally, the wood gas that has been sufficiently mixed with the combustion-supporting gas flows into the combustion space 90 through the upper flame holes 112 for secondary combustion.

In addition, the user can decide whether to activate the air-enhancing unit 3 according to actual needs. When the air-enhancing unit 3 is activated, the combustion-supporting gas flowing in through the air inlet 122 can be acceleratedly sent through the air-enhancing unit 3 The air inlet port 412 flows through the inner surface of the outer ring wall 411 of the outer cover 41 and then flows into the heat insulating space 92. Since the present invention has the flow guiding unit 4 capable of guiding the combustion gas to flow smoothly to the heat insulating space 92, the combustion gas can avoid local turbulence as in the conventional portable wood gas furnace because of the more directional flow. The phenomenon allows the combustion gas to flow smoothly to the heat preservation space 92, thereby effectively increasing the amount of intake air of the combustion gas. In this way, the novel type can effectively burn the combustible material completely because the combustion gas is sufficient, and the combustible material is easy to reach the ignition point, thereby improving the overall combustion efficiency of the novel.

In summary, the new portable biofuel furnace can achieve the purpose of the present invention.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Patient unit
11‧‧‧Inner tube holder
111‧‧‧Inner cylinder
112‧‧‧Upper flame hole
113‧‧‧Under the smoke hole
12‧‧‧Outer tube holder
121‧‧‧Outer cylinder
122‧‧‧air inlet
123‧‧‧Body section
124‧‧‧Capping
13‧‧‧Seal
2‧‧‧Insulation unit
21‧‧‧Insulation
22‧‧‧Main reflector
23‧‧‧ ring seat
231‧‧‧ ring body
232‧‧‧Split sheet
233‧‧‧ Positioning parts
234‧‧‧ card slot
235‧‧‧ embedded card department
24‧‧‧ times insulation
25‧‧‧reflective parts
3‧‧‧ aeration unit
31‧‧‧ mandrel
32‧‧‧Weibi
33‧‧‧ fan leaves
4‧‧‧Guide unit
41‧‧‧ outer cover
411‧‧‧ outer ring wall
412‧‧‧ inlet port
42‧‧‧ inner cover
421‧‧‧ bottom wall
422‧‧‧ inner ring wall
43‧‧‧ Diversion interval
431‧‧‧ neck section
5‧‧‧Diffuse seat
51‧‧‧Outer Rings
52‧‧‧ Inner Ring Department
53‧‧‧ slotting
54‧‧‧ Wood gas detention area
6‧‧‧ Grid
61‧‧‧ dish
62‧‧‧ mesh
8‧‧‧Support
90‧‧‧ burning space
91‧‧‧Mezzanine space
92‧‧‧Insulation space
100‧‧‧ portable raw fuel furnace
L1‧‧‧ axis

Other features and effects of the present invention will be apparent from the following description of the drawings, in which: 1 is a perspective view showing an embodiment of the present portable biomass fuel furnace; FIG. 2 is a perspective view showing a combined state of the embodiment; FIG. 3 is a cross-sectional view showing an outer cylinder holder of the embodiment, An inner cylinder seat cooperates with a sealing member to define a sandwich space; FIG. 4 is a schematic view showing that the wood gas and the combustion-supporting gas flowing in a heat-insulating space in this embodiment can be spirally arranged after passing through a ring seat. Figure 5 is a schematic view showing the ring seat of the embodiment having a ring body and a plurality of splitter bodies respectively disposed on the ring body; Fig. 6 is a schematic view showing the embodiment of the ring body The opposite ends of the ring seat are fixed to each other by means of a card insertion; and Fig. 7 is a cross-sectional view showing the direction along the line VII-VII of Fig. 3.

1‧‧‧Patient unit

31‧‧‧ mandrel

11‧‧‧Inner tube holder

32‧‧‧Weibi

111‧‧‧Inner cylinder

33‧‧‧ fan leaves

112‧‧‧Upper flame hole

4‧‧‧Guide unit

113‧‧‧Under the smoke hole

41‧‧‧ outer cover

12‧‧‧Outer tube holder

411‧‧‧ outer ring wall

121‧‧‧Outer cylinder

412‧‧‧ inlet port

122‧‧‧air inlet

42‧‧‧ inner cover

123‧‧‧Body section

421‧‧‧ bottom wall

124‧‧‧Capping

422‧‧‧ inner ring wall

13‧‧‧Seal

5‧‧‧Diffuse seat

2‧‧‧Insulation unit

6‧‧‧ Grid

21‧‧‧Insulation

61‧‧‧ dish

22‧‧‧Main reflector

62‧‧‧ mesh

23‧‧‧ ring seat

8‧‧‧Support

24‧‧‧ times insulation

90‧‧‧ burning space

25‧‧‧reflective parts

100‧‧‧ portable raw fuel furnace

3‧‧‧ aeration unit

Claims (10)

A portable biomass fuel furnace comprising: a barrel base unit, comprising an inner cylinder base, and a set of outer cylinder bases disposed outside the inner cylinder base, the top of the inner cylinder base being in close contact with the top of the outer cylinder base The inner cylinder block includes an inner cylinder body defining a combustion space, a plurality of upper flame holes radially extending through the inner cylinder body, and a plurality of lower smoke holes radially extending through the inner cylinder body and located below the upper flame holes The outer cylinder base includes an outer cylinder surrounding the inner cylinder body, and an air inlet opening through the outer cylinder body and located below the inner cylinder body, the inner and outer cylinder seats cooperate to define a sandwich space; And an insulation unit, which is disposed at least one of an outer circumferential surface of the outer cylinder base and a space of the interlayer, and when the heat preservation unit is located in the interlayer space, the heat preservation unit surrounds the inner cylinder and defines a The combustion space, the upper flame holes and the insulated spaces of the lower smoke holes communicate with each other. The portable biomass fuel furnace according to claim 1, wherein the heat retention unit is located in the interlayer space and includes a heat insulating material disposed around an axis and disposed on an inner circumferential surface of the outer cylinder. The portable biomass fuel furnace according to claim 2, wherein the heat retention unit further comprises a main reflection member surrounding the axis and interposed between the heat insulating material and the inner cylinder. The portable biomass fuel furnace according to claim 3, wherein the heat retention unit further comprises at least one surrounding the axis and interposed between the main reflector and the inner cylinder The ring seat has a ring body and a plurality of splitter bodies disposed on one of the inner and outer peripheral surfaces of the ring body. The portable biomass fuel furnace according to claim 4, wherein the heat insulating material of the heat insulating unit is fibrous, and the ring seat further has a plurality of positioning members disposed on the ring body, wherein the splitting bodies are located The inner circumferential surface of the ring body is located on the outer circumferential surface of the ring body and can be positioned on the heat insulating material through the main reflection member. The portable biomass fuel furnace according to any one of claims 1 to 5, further comprising a hollow diffusion seat disposed on the base unit, the diffusion seat including an outer ring disposed on the inner cylinder a portion, an inner ring portion extending from the outer ring portion toward the combustion space, and a plurality of slots formed in the inner ring portion. The portable biomass fuel furnace according to any one of claims 1 to 5, further comprising a grid detachably disposed between the upper flame holder and the lower smoke holes The grid includes a disk body and a plurality of meshes extending through the disk body. The portable biomass fuel furnace according to any one of claims 1 to 5, wherein the heat retention unit is located in the interlayer space, the portable biomass fuel furnace further comprising a space located in the interlayer space and disposed on the outer cylinder seat a gas-increasing unit, and a flow guiding unit connecting the gas-increasing unit and the heat-insulating unit, the flow guiding unit comprising an outer casing extending downward from the heat-insulating unit and having an outer diameter tapered, the outer casing having a bowl shape The outer annular wall and an inlet port defined by the bottom edge of the outer annular wall. The portable biomass fuel furnace of claim 8, wherein the flow guiding unit further comprises an inner casing seat inside the outer casing, the inner casing has a bottom wall, and an inner wall extending upward from the periphery of the bottom wall And an outer ring wall having an outer diameter gradually expanding, the air entraining unit includes a mandrel having an outer diameter substantially equal to an outer diameter of the bottom wall of the inner casing, a peripheral wall surrounding the mandrel and connecting the bottom edge of the outer casing And a plurality of blades disposed on the mandrel, the outer and inner shrouds cooperate to define a flow guiding section that is narrower in width and width. The portable biomass fuel furnace according to claim 9, wherein the heat retention unit further comprises a secondary heat insulating material between the inner cylinder and the inner casing of the flow guiding unit, and a secondary insulation A secondary reflector between the hot material and the inner cylinder.