TWM581666U - Flow guiding unit for portable biomass fuel furnace - Google Patents

Abstract

A flow guiding unit for a portable raw fuel furnace, the portable raw fuel furnace comprising an inner cylinder seat and a set of outer cylinder bases disposed outside the inner cylinder seat, the inner cylinder base and the outer cylinder base A sandwich space is defined, the outer cylinder seat has a lower air inlet, and the flow guiding unit is disposed corresponding to the air inlet of the outer cylinder seat and the interlayer space. The flow guiding unit comprises an outer cover seat and an air inlet port. The outer cover seat extends from the interlayer space toward the air inlet and has an outer diameter that is tapered, and includes a bowl-shaped outer ring wall. The air inlet port is defined by the bottom edge of the outer ring wall and communicates with the air inlet. Thereby, the combustion gas can be guided to flow smoothly to the interlayer space, thereby improving the overall combustion efficiency.

Description

Flow guiding unit for portable biomass fuel furnace

The present invention relates to a component of a combustion furnace, and more particularly to a flow guiding unit for a portable biomass fuel furnace which can effectively improve 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 upwardly through the through holes adjacent to the sealing member and then flows into the combustion space for secondary combustion. Burning work.

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 flow guiding unit for a portable biomass fuel furnace that can improve combustion efficiency.

Thus, the present invention is a flow guiding unit for a portable raw fuel furnace, the portable raw fuel furnace comprising an inner cylinder base and a set of outer cylinder bases disposed outside the inner cylinder seat, The inner cylinder seat cooperates with the outer cylinder seat to define a sandwich space, and the outer cylinder seat has a lower air inlet, and the flow guiding unit is disposed corresponding to the air inlet of the outer cylinder seat and the interlayer space. The flow guiding unit comprises an outer cover seat and an air inlet port.

The outer cover seat extends from the interlayer space toward the air inlet and has an outer diameter that is tapered, and includes a bowl-shaped outer ring wall.

The air inlet port is defined by the bottom edge of the outer ring wall and communicates with the air inlet.

The utility model has the advantages that by providing the outer cover seat and the air inlet port, the combustion-supporting gas can be smoothly flowed to the interlayer space to improve the combustion efficiency.

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

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

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

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. FIG. 1 is a perspective view illustrating an embodiment of the present invention for a flow guiding unit for a portable biomass fuel furnace. FIG. 2 is a perspective view showing a combined state of the portable biomass fuel furnace; FIG. 3 is a cross-sectional view showing an outer cylinder seat, an inner cylinder base and a portable base of the portable biomass fuel furnace The seals cooperate 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 the portable raw fuel furnace can flow upward in a spiral manner after passing through a ring seat. Figure 5 is a schematic view showing the ring seat of the portable biomass fuel furnace having a ring body and a plurality of splitter bodies respectively disposed on the ring body; Figure 6 is a schematic view showing that the opposite ends of the ring seat of the portable biomass fuel furnace are fixed to each other in a snap-fit manner; and Figure 7 is a cross-sectional view showing the direction along the line VII-VII of Figure 3 .

Referring to Figures 1 through 3, an embodiment of the present invention for a flow guiding unit 4 for a portable biomass fuel furnace 100 can be applied to the portable biomass fuel furnace 100, which includes a barrel unit 1 , a heat preservation unit 2, a gas boosting 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. In addition, the bottom of the outer cylinder base 12 can also be provided with a plurality of support members 8 (as shown in FIG. 4). As shown, thereby allowing more combustion gas to smoothly flow from the outside of the outer cylinder block 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 embodiment 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, thereby effectively preventing the gas from flowing smoothly, and because The grid 6 is designed to be detachably disposed in the inner cylinder block 11, so that it 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 is defined An insulated space 92 that communicates with the combustion space 90, the upper flame holes 112, and the lower smoke holes 113.

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 embodiment has the design of the heat insulating material 21 and the main reflection member 22, so that heat energy can be effectively reduced from the inner cylinder 111 to 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 at the same. The outer peripheral surface of the ring 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 heat preservation unit 2 of the embodiment can also be only one, and thus 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 limitation. The gas-enhancing 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 embodiment 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, thereby allowing the well-mixed wood gas and the combustion-supporting gas to reach a short stay. The phenomenon provides more flammable and combustion-supporting materials, which can help improve combustion efficiency.

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 follows the inlet port 122. The inflowing combustion-supporting gas flows upward from the bottom end of the heat insulating space 92. Since each ring seat 23 of the embodiment 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 to be spiraled. The manner is slowly increased. Compared with the conventional portable wood gas furnace which does not have the ring seats 23 and can only allow the gas to flow in the vertical direction, the present embodiment can extend the gas staying in the heat preservation by changing the gas flow direction. The time in the space 92 further allows the wood gas and the combustion-supporting gas to be more uniformly mixed with each other. It is also worth mentioning that each ring seat 23 of the present embodiment has the design of the splitter bodies 232, and can also produce local mixed flow at the periphery of the splitter bodies 232 to help the wood gas and combustion support. The gas is more thoroughly mixed. 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 flow guiding unit 4 of the present invention can guide the combustion gas to flow smoothly to the heat insulating space 92, the combustion gas can avoid local turbulence caused by the conventional portable wood gas furnace because of the more directional flow. Thereby, the combustion gas can be smoothly flowed to the heat preservation space 92, thereby effectively increasing the intake air amount of the combustion gas. In this way, in use, the combustible gas can be completely burned because the combustion gas is sufficient, and the combustible material is easy to reach the ignition point. Thereby improving the overall combustion efficiency.

In summary, the flow guiding unit of the present invention for a portable raw fuel furnace can guide the combustion gas body to flow smoothly to the interlayer space 91, thereby improving the overall combustion efficiency, so that the purpose of the present invention can be achieved.

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.

Claims (2)

A flow guiding unit for a portable raw fuel furnace, the portable raw fuel furnace comprising an inner cylinder seat and a set of outer cylinder bases disposed outside the inner cylinder seat, the inner cylinder base and the outer cylinder base Defining a sandwich space, the outer cylinder base has a lower air inlet, and the flow guiding unit is disposed corresponding to the air inlet of the outer cylinder seat and the interlayer space, and includes:  An outer cover seat extending from the interlayer space toward the air inlet and having an outer diameter tapered, and including a bowl-shaped outer ring wall;  An air inlet port is defined by the bottom edge of the outer ring wall and communicates with the air inlet.   The flow guiding unit for a portable raw fuel furnace according to claim 1, further comprising an inner cover seat inside the outer cover seat, the inner cover base having a bottom wall, and an upward extending from a periphery of the bottom wall And the outer ring wall with the outer diameter diverging, the outer and inner cover seats cooperate to define a flow guiding section which is narrower in width and narrower and communicates the air inlet and the interlayer space.