Wood drying equipment for firewood production

Abstract

To minimize the area of a wood dryer installation place, to improve efficiency of installing and producing firewood, and to make a wood dryer compact and simple, and to sufficiently dry wood to improve the quality of firewood, and to reduce greenhouse effect gas to contribute to the protection of the natural environment.SOLUTION: The wood dryer for producing firewood, comprising a cylindrical or bag-shaped heat insulating sheet 4 storing a group of wood Gw including a plurality of wood pieces Wo, with at least the bottom face 4d and the upper face 4u thereof being air-permeable, and a mounting face 2u whereon the bottom face section 4d of the air-permeable heat insulating sheet 4 storing the group of wood Gw, is mounted, is characterized by comprising a base unit 2 of a prescribed height, comprising air permeable spaces Sp disposed on the side faces 2p thereof, a top plate 3b covering the upper face section Gwu of the group of wood Gw stored in the heat insulating sheet 4 and mounted on the mounting face 2u, with a prescribed gap Fs apart, and smoke stuck unit 3 comprising a smoke stuck 3s disposed on the center of the top plate 3b or on the vicinity thereof, to protrude in the upward direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wood drying device for firewood production, which is used to dry wood when producing firewood.

Background Art

[0002] Generally, in a firewood stove or an outdoor camp, dried firewood is used. Therefore, when producing firewood, it is necessary to dry the wood with a wood drying device. In the case of firewood used personally by a general household, etc., it is often left under the eaves of a house and dried naturally, but in order to efficiently secure a certain amount, it is also required to shorten the drying period as much as possible and obtain high-quality firewood.

[0003] Conventionally, a wood drying device for meeting such requirements has also been proposed. As this type of wood drying device, a wood drying device using an air heat collection method described in Patent Document 1 and a solar heat passive utilization wood drying device described in Patent Document 2 are known.

[0004] The wood drying device using the air heat collection method of Patent Document 1 is a wood drying device that circulates and uses the warm air obtained by an air heat collection type collector in which a porous sheet-like heat collection material that receives sunlight is inclinedly installed in a wind tunnel whose outer peripheral surface is covered with a transparent cover as the air for wood drying. The wood drying chamber has a double ceiling, an air circulation fan for the heat collection type collector is provided on the outer ceiling, and a drying air circulation fan that circulates the drying air sent into the double ceiling by the circulation fan through the drying chamber and the double ceiling is provided on the inner ceiling. The air circulation system for the heat collection type collector and the air circulation system for drying are each in a separate system.

[0005] Furthermore, the solar thermal passive wood drying apparatus described in Patent Document 2 aims to provide a solar thermal passive wood drying apparatus that utilizes low-temperature drying through the passive use of solar heat, by modifying an agricultural vinyl greenhouse. Specifically, the drying chamber, which is a modified agricultural vinyl greenhouse frame, has a roof structure that slopes gently to the south with the north side as the apex. Except for the north side wall, the roof and the east, west, and south side walls of the three side walls are covered with a double layer of transparent film. The roof and south side wall are divided into east and west sections by a partition film, and these are further divided into six parallel air passages in the north-south direction by transparent film. An air layer is formed between the two layers of transparent film with an insulating material in between, and a heat collection space is left inside and covered with another layer of transparent film. A carbon fiber sheet is then floated on top of this transparent film to make it semi-permeable. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 63-70048 [Patent Document 2] Japanese Patent Publication No. 2007-112009 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, the conventional wood drying equipment described above had the following problems.

[0008] Firstly, the process involves installing a drying chamber, placing the timber inside, and connecting it to a heat collection device installed elsewhere via ducts. By circulating warm air between the drying chamber and the heat collection device, the equipment becomes large-scale, leading to an overall increase in size and cost (initial cost) due to the need to use many blowers and structural materials.

[0009] Secondly, if the drying period is insufficient, moisture will remain. When moisture remains, the heat generated during combustion is used to evaporate the moisture, drastically reducing combustion efficiency. As a result, it becomes difficult to secure the necessary warmth, and large amounts of smoke and soot are easily produced. Moreover, it is prone to deterioration of the quality of the firewood (product) due to the growth of mold and fungi.

[0010] Thirdly, when firewood (wood) is exposed to sunlight containing ultraviolet rays, it is prone to fading (discoloration), which can lead to a decline in the appearance (visual quality) of the firewood. Since firewood is sometimes stored indoors near a wood-burning stove before use, insect contamination cannot be ignored. In particular, insect contamination is a problem that can easily occur during firewood production, whether due to contamination during the drying period or eggs and larvae present in the wood before felling.

[0011] Fourthly, it is necessary to constantly circulate the air using multiple fans. Therefore, from the perspective of eliminating electricity consumption, reducing greenhouse gas emissions, and protecting the natural environment, this is a negative factor. Moreover, it increases running costs, making it less economical, and it is also less maintainable, as it is prone to malfunctions and other problems.

[0012] The present invention aims to provide a wood drying apparatus for firewood production that solves the problems present in the background technology described above. [Means for solving the problem]

[0013] To solve the above-mentioned problems, the present invention provides a wood drying apparatus 1 for firewood production that dries wood Wo... for producing firewood W... comprising: a cylindrical or bag-shaped heat-insulating sheet section 4 that accommodates a group of wood Gw including a plurality of pieces of wood Wo... cut to a predetermined size, and ensures ventilation at least at the bottom portion 4d and the top portion 4u; a base section 2 of a predetermined height that is breathable and has a mounting surface section 2u on which the bottom portion 4d of the heat-insulating sheet section 4 containing the group of wood Gw is placed, and has a ventilation space Sp on its side 2p; and a chimney unit section 3 that has a top plate section 3b that covers the top portion Gwu of the group of wood Gw contained in the heat-insulating sheet section 4 placed on the mounting surface section 2u with a predetermined interval Fs, and a chimney section 3s that is provided in the center or near the center of the top plate section 3b and protrudes upward.

[0014] In this case, according to a preferred embodiment of the invention, the group of wood Gw may include a plurality of pieces of wood Wo... arranged upright with one end face Wos... at the bottom of the heat-insulating sheet portion 4, or a plurality of pieces of wood Wo... arranged randomly. The top plate portion 3b may be provided with an inclined surface 3ui that slopes downward outward from the chimney portion 3s, and the top plate portion 3b may be provided with a side cover portion 11 that covers the upper part Gwpu of the side portion Gwp of the group of wood Gw. On the other hand, the chimney portion 3s may be provided with an upper end cover portion 12 at the top end to prevent at least rain from entering. Furthermore, a flexible container bag 13 can be used for the heat-insulating sheet portion 4. It is desirable that the entire heat-insulating sheet portion 4 be colored with a heat-absorbing color 4c that has high heat absorption. [Effects of the Invention]

[0015] The wood drying apparatus 1 for firewood production according to the present invention, having such a configuration, produces the following remarkable effects.

[0016] (1) The installation space can be minimized, as it can be installed in the minimum necessary space which is approximately the same width as the total width of the wood group Gw to be dried. This improves installation efficiency and, furthermore, production efficiency. Moreover, the drying device 1 can be made smaller, more compact, and simpler, and a blower fan is not required. Since only the minimum necessary structural materials are needed, a significant overall cost reduction can be achieved.

[0017] (2) Because the wood Wo… can be thoroughly dried, the adverse effects of residual moisture, specifically the inability to secure sufficient warmth due to reduced combustion efficiency and the tendency for large amounts of smoke and soot to be generated during combustion, can be eliminated, and stable, high-quality firewood W… can be produced efficiently. In addition, quality deterioration due to the growth of mold and fungi can be eliminated, and problems that would degrade the indoor environment can be avoided even when firewood W… is stored indoors.

[0018] (3) Because it utilizes convection and does not use fans or other blowing equipment, it does not consume electricity. Therefore, it can contribute to reducing greenhouse gases and protecting the natural environment, and can be effectively implemented by making effective use of farmland and vacant lots in remote areas where there are no power lines. Moreover, since there are almost no running costs, it is economically superior, and because malfunctions and other issues can be avoided, it can be provided as a wood drying apparatus 1 with excellent maintainability.

[0019] (4) In a preferred embodiment, if the group of wood Gw includes multiple pieces of wood Wo... stored in an upright position with one end face Wos... at the bottom of the heat-insulating sheet section 4, or multiple pieces of wood Wo... stored in a random state, then the drying apparatus 1 can be provided as a highly versatile device that can be flexibly adapted to existing production equipment (cutting process, etc.) for the wood Wo....

[0020] (5) In a preferred embodiment, if the top plate portion 3b is provided with an inclined surface 3ui that slopes downward outward from the chimney portion 3s, the convection action flowing from the bottom to the top can be made smoother, thereby avoiding unnecessary stagnation of air and further improving drying efficiency.

[0021] (6) In a preferred embodiment, if a side cover portion 11 that covers an upper part Gwpu of a side surface portion Gwp of the wood group Gw is provided on the top plate portion 3b, air containing moisture rising from the wood group Gw can be more reliably collected, so that a smoother and more efficient convection action can be ensured.

[0022] (7) In a preferred embodiment, if an upper end cover portion 12 that at least prevents rain from entering is provided at the upper end of the chimney portion 3s, unnecessary intrusion of rain and wind into the chimney portion 3s can be prevented, and unnecessary intrusion of dust and the like from the outside can also be prevented. In particular, since the ventilation space of the chimney portion 3s can be closed by a cap or the like, even when there are insects in the wood group Gw including the insects that have invaded and the larvae in the wood, by temporarily blocking the air permeability of the chimney portion 3s, the inside of the heat insulating sheet portion 4 can be made hotter, and the insects and the like that have mixed in can be killed and removed without using chemicals.

[0023] (8) In a preferred embodiment, if a flexible container bag 13 is used for the heat insulating sheet portion 4, so-called general-purpose commercially available products can be diverted (utilized), and further cost reduction can be achieved. In particular, by using a material excellent in weather resistance and light shielding properties such as the flexible container bag 13, fading, discoloration, coloring, etc. of the firewood W... due to sunlight and wind and rain can be prevented, contributing to the improvement of the appearance and commercial value of the firewood W....

[0024] (9) In a preferred embodiment, if the entire heat insulating sheet portion 4 is colored with a heat absorption color 4c having high heat absorption, the heat insulating effect can be enhanced by an easy method of only coloring, so that improvement of the drying ability can be easily and low-cost realized, and quality deterioration such as discoloration of the wood Wo... can be prevented.

Brief Description of the Drawings

[0025] [Figure 1] Front cross-sectional configuration diagram when using the firewood production wood drying device according to a preferred embodiment of the present invention, [Figure 2] Plan view when using the wood drying device, [Figure 3] Front view of the wood drying apparatus during use. [Figure 4] A partial cross-sectional side view of the base section of the wood drying apparatus. [Figure 5] Diagram illustrating the operation of the wood drying apparatus. [Figure 6] A flowchart explaining the procedure for using the wood drying apparatus. [Figure 7] A process diagram illustrating the procedure for using the wood drying apparatus. [Figure 8] Other process diagrams illustrating the operation procedure of the wood drying apparatus, [Modes for carrying out the invention]

[0026] Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0027] First, the configuration of the wood drying apparatus 1 for firewood production according to this embodiment will be described with reference to Figures 1-4 and Figure 8.

[0028] As shown in Figure 1, this wood drying apparatus 1 is broadly composed of a base section 2, a chimney unit section 3, and an insulating sheet section 4.

[0029] The base portion 2 is provided with a mounting surface portion 2u on which the bottom portion 4d of the heat-insulating sheet portion 4, which contains a group of wood Gw including multiple pieces of wood Wo… cut to a predetermined size and is breathable, is configured to a predetermined height with a ventilation space Sp on the side portion 2p.

[0030] As shown in Figure 1, the example base 2 uses metal rods 21r… with a circular cross-section, and as shown in Figure 4, both ends are joined by welding or the like to form a rectangular frame member 21, and multiple such frame members 21… are prepared (11 in this example). Then, as shown in Figures 1 and 2, each frame member 21… is arranged at regular intervals, and as shown in Figure 4, the inside of each frame member 21… is connected by welding or the like with six connecting plates 22…. In this case, each upper frame portion 21u… which constitutes the long side located above each frame member 21… is connected by three connecting plates 22… which are arranged at predetermined intervals and intersect, and each lower frame portion 21d… which constitutes the long side located below each frame member 21… is connected by three connecting plates 22… which are arranged at predetermined intervals and intersect.

[0031] As a result, as shown in Figure 1, a mounting surface 2u is formed by the upper ends of each upper frame section 21u..., and a heat-insulating sheet section 4, described later, which contains multiple pieces of wood Wo... cut to the size of firewood W..., i.e., a group of wood Gw, can be placed on this mounting surface 2u. In addition, ventilation is ensured by the gaps created by the spacing between each frame member 21... Furthermore, as shown in Figure 4, a rectangular frame-shaped ventilation space Sp is formed on the side surface 2p of the base section 2, and the left and right frame sections 21p and 21q that constitute the short sides of each frame member 21... form a base section 2 with a predetermined height.

[0032] The configuration of the base portion 2 shown in Figure 1 is just one example; the mounting surface portion 2u may be made of plate material or net material, etc. Basically, the base portion 2 should be of a predetermined height, with a mounting surface portion 2u that is breathable and on which the bottom portion 4d of the heat-insulating sheet portion 4 containing the wood group Gw is placed, and a ventilation space Sp on the side 2p.

[0033] As shown in Figures 1 and 8, the chimney unit 3 comprises a top plate 3b that covers the upper surface portion Gwu of the wood group Gw, including the entire wood Wo placed on the mounting surface 2u, with a predetermined interval Fs between them, and a chimney portion 3s that is provided in the center (or near the center) of the top plate 3b and protrudes upward. In this case, the top plate 3b is formed in a disc shape as a whole and has an inclined surface 3ui that slopes downward outward from the chimney portion 3s. By forming such an inclined surface 3ui, the convection action flowing from bottom to top can be made smoother, thereby avoiding unnecessary stagnation of air and improving drying efficiency.

[0034] Furthermore, a downward-hanging side cover portion 11 is integrally provided on the outer edge of the top plate portion 3b, covering a portion of the upper part Gwpu of the side portion Gwp of the wood group Gw. By providing such a side cover portion 11, moisture-containing air rising from the wood group Gw can be collected more reliably, thereby ensuring a smoother and more efficient convection effect.

[0035] On the other hand, the chimney section 3s includes a pipe-shaped chimney body section 26 that rises upward from an outlet 25 formed in the center (or near the center) of the top plate section 3b, and an upper end cover section 12 is provided at the upper end of this chimney body section 26 to prevent rain from entering. As shown in Figure 1, the example upper end cover section 12 is formed in an inverted cup shape, and this upper end cover section 12 is positioned to cover the upper end opening of the chimney body section 26, and the other ends of a plurality of support stays 26s..., one end of which is fixed to the outer circumferential surface near the upper end opening of the chimney body section 26, are fixed to the inner circumferential surface of the upper end cover section 12. In this way, the upper end cover section 12 is supported at the upper end of the chimney body section 26. By providing such an upper end cover section 12, it is possible to prevent unnecessary intrusion of rain and wind into the chimney section 3s, as well as unnecessary intrusion of debris from the outside.

[0036] In this case, it becomes possible to block the ventilation space of the chimney section 3s with a cap or the like. Therefore, even if insects are present in the wood group Gw, including invading insects and larvae inside the wood, temporarily blocking the ventilation of the chimney section 3s will raise the temperature inside the heat-insulating sheet section 4, allowing for the killing or extermination of any insects present without the use of chemicals.

[0037] The chimney unit 3 may be constructed as a combination of parts made of heat-resistant plastic material, or it may be formed by processing metal material (metal panel). It may also be constructed as a combination of plastic material, metal material, or other materials, and the type of material is not limited.

[0038] The heat-insulating sheet section 4 is formed to shield the side portion Gwp of the wood group Gw, a part of the side portion 3sp of the chimney section 3s, and the upper surface portion 3bu of the top plate section 3b. In this case, a flexible container bag (FIBC) 13 as shown in Figure 8 can be used for the heat-insulating sheet section 4. The FIBC 13 is a bag made of chemical fibers such as polyethylene or polypropylene, and is originally intended to contain grains, feed, soil, etc., but is repurposed as the heat-insulating sheet section 4. By using such an FIBC 13 for the heat-insulating sheet section 4, it is possible to repurpose (utilize) a general-purpose commercially available product, thereby achieving further cost reductions. In this case, the FIBC 13 may be unused or a reused second-hand product.

[0039] The flexible container bag 13 used in the embodiment, as shown in Figure 8, has a cylindrical body portion 31, an inlet 32 ​​provided at one end of the body portion 31, a closing surface 33 that closes the other end of the body portion 31, and a small cylindrical discharge pipe 34 extending from an outlet 33h provided in the center of the closing surface 33. Alternatively, as shown by dashed lines in Figure 8, the closing surface 33 and the discharge pipe 34 may be removed from the body portion 31, and an opening 35s similar to the inlet 32 ​​may be provided at the other end of the body portion 31.

[0040] In this case, all of the flexible container bags 13 shown in Figure 8 are cylindrical in shape with openings at one end and the other. However, the other end (opening 35s) may be closed with a breathable net or the like to form a bag shape. When formed into a bag shape, the other end (opening 35s) can be positioned downwards, with the opening at one end facing upwards, and the cut lumber Wo… can be inserted through the opening at the one end. Multiple pieces of lumber Wo… in this state form a randomly arranged group of lumber Gw.

[0041] Therefore, the wood group Gw may consist of multiple pieces of wood Wo... stored in an upright position with one end face Wos... at the bottom of the heat-insulating sheet section 4, or it may consist of multiple pieces of wood Wo... stored in a random state. In this way, the wood group Gw can include various configurations of storage in the heat-insulating sheet section 4, allowing for flexible adaptation of existing production equipment (cutting processes, etc.) for the wood Wo..., thus providing a highly versatile drying apparatus 1.

[0042] Furthermore, it is desirable to color the entire heat-insulating sheet portion 4 with a highly heat-absorbing color 4c, specifically black. By coloring with such a heat-absorbing color 4c, the heat-insulating effect can be enhanced by a simple coloring method, thereby easily and inexpensively improving drying capacity and preventing quality deterioration such as discoloration of the wood Wo….

[0043] In particular, using a material with excellent weather resistance and light-blocking properties, such as the flexible container bag 13, can prevent fading, discoloration, and staining of the firewood W due to sunlight and wind and rain, thereby contributing to an improvement in the appearance and marketability of the firewood W. Therefore, it is also possible to create a dedicated heat-insulating sheet section 4 using a material with the same (or equivalent) weather resistance and light-blocking properties as the flexible container bag 13.

[0044] Based on the above, a wood drying apparatus 1 for firewood production is configured to dry the wood Wo... which will produce firewood W....

[0045] Next, the method of using the wood drying apparatus 1 for firewood production according to this embodiment will be explained in accordance with the flowchart in Figure 6 and the process diagrams in Figures 7-8, with reference to each figure.

[0046] First, the base unit 2 is installed outdoors in a place with good sunlight, as shown in Figure 7 (Step S1). The example shows the base unit installed directly on a flat ground E. Next, a predetermined quantity of wood (undried firewood) Wo... cut to the size of firewood W... is placed upright on the mounting surface 2u of the base unit 2, with one end face Wos... facing downwards, as shown in Figure 7 (Step S2). The figure shows the group of wood Gw installed on the mounting surface 2u. If necessary, the multiple pieces of wood Wo... (group of wood Gw) may be temporarily secured with string or the like to prevent them from collapsing.

[0047] Next, as shown in Figure 8, the top plate portion 3b of the chimney unit portion 3 is placed on the group of wood Gw installed on the mounting surface portion 2u (step S3). At this time, the outer edge of the top plate portion 3b abuts against the outer edge of the group of wood Gw to support the chimney unit portion 3, and a part of the upper part Gwpu of the side portion Gwp of the group of wood Gw is covered by the side cover portion 11 provided on the top plate portion 3b. Figure 8 shows this state. This side cover portion 11 allows for more reliable collection of moisture-containing air rising from the group of wood Gw, thereby ensuring a smoother and more efficient convection action.

[0048] Next, prepare the flexible container bag 13 (insulating sheet portion 4), and as shown in Figure 8, with the opening 32 of the flexible container bag 13 facing downwards, attach it by covering the upper end of the chimney unit portion 3 along the arrow line (step S4). As a result, the side portion Gwp of the wood group Gw is covered by the main body portion 31 of the flexible container bag 13, the closing surface 33 of the flexible container bag 13 is placed on the upper surface portion 3bu of the top plate portion 3b of the chimney unit portion 3, and furthermore, a part of the side portion 3sp of the chimney portion 3s is covered by the discharge pipe 34 of the flexible container bag 13. This positional relationship is as shown in Figure 1.

[0049] Once the flexible container bag 13 is installed, as shown in Figure 3, the discharge pipe 34 is fixed to the side portion 3sp of the chimney section 3s by fixing members 41... such as strings, thereby ensuring airtightness between the side portion 3sp and the discharge pipe 34 (step S5). Note that the fixing members 41... shown in the example are merely an example illustrating the principle, and in practice, airtightness (watertightness) can be achieved by known means such as interposing a packing such as a rubber sheet.

[0050] With the installation of the wood drying device 1 completed, the wood is left to stand naturally for a predetermined period of time (step S6).

[0051] Figure 5 shows the internal workings of the wood drying apparatus 1 when left to dry naturally. When left to dry naturally, sunlight Ds… indicated by the dotted arrows irradiates the outer surface of the flexible container bag 13, warming the air inside the flexible container bag 13 (steps S7, S8). This dries the wood Wo… (step S9). Then, the air Da… containing moisture components inside the wood Wo… rises due to convection, as indicated by the solid arrows (step S10). The rising air Da… enters the chimney body 26 along the inclined surface 3ui, and after rising through the chimney body 26, is discharged to the outside through the upper end cover 12 (step S11).

[0052] Furthermore, due to this convection, outside air Dc... enters the interior of the flexible container bag 13 through the inlet 32 ​​at the lower end of the flexible container bag 13. This outside air Dc... passes through the ventilation space Sp provided on the side surface 2p of the base portion 2 and enters the interior of the flexible container bag 13 through the breathable mounting surface 2u of the base portion 2 (step S12).

[0053] Then, after the predetermined period has elapsed, the wood drying apparatus 1 is disassembled in the reverse order of installation as described above, and the firewood W obtained by drying is removed (steps S13, S14, S15).

[0054] Therefore, according to the wood drying apparatus 1 for firewood production according to this embodiment, the basic configuration includes a cylindrical or bag-shaped heat-insulating sheet section 4 that accommodates a group of wood Gw including a plurality of pieces of wood Wo… cut to a predetermined size, and ensures ventilation at least at the bottom portion 4d and the top portion 4u; a base section 2 of a predetermined height that is breathable and has a mounting surface section 2u on which the bottom portion 4d of the heat-insulating sheet section 4 containing the group of wood Gw is placed, and has a ventilation space Sp on the side 2p; and a top plate section 3b that covers the top portion Gwu of the group of wood Gw contained in the heat-insulating sheet section 4 placed on the mounting surface section 2u with a predetermined interval Fs, and a chimney unit section 3 that has a chimney section 3s provided in the center or near the center of the top plate section 3b and protruding upward. As such, it can be installed with the minimum necessary space that is approximately the same width as the total width of the group of wood Gw to be dried, thus minimizing the installation space, which improves installation efficiency and further improves production efficiency. Furthermore, the drying apparatus 1 can be made smaller, more compact, and simpler, and a blower fan is no longer required. Since only the minimum necessary structural materials are needed, a significant overall cost reduction can be achieved.

[0055] Furthermore, because the wood Wo… can be thoroughly dried, the adverse effects of residual moisture, specifically the inability to secure sufficient warmth due to reduced combustion efficiency and the tendency for large amounts of smoke and soot to be generated during combustion, are eliminated, enabling the efficient production of stable, high-quality firewood W…. In addition, quality deterioration due to the growth of mold and fungi is eliminated, and problems such as deterioration of the indoor environment when firewood W… is stored indoors are avoided. Moreover, because convection is utilized and no blowing equipment such as fans is used, there is no electricity consumption. Therefore, it can contribute to the reduction of greenhouse gases and the protection of the natural environment. Moreover, since running costs are almost unnecessary, it is economically superior, and because malfunctions and other issues are avoided, it can be provided as a wood drying device 1 with excellent maintainability.

[0056] Although preferred embodiments have been described in detail above, the present invention is not limited to these embodiments, and the details of the configuration, shape, materials, quantity, numerical values, etc. can be arbitrarily changed, added, or deleted without departing from the spirit of the present invention.

[0057] For example, when forming the mounting surface 2u, it is desirable to form it so that it can make point contact or line contact with one end surface Wos… of the wood Wo…, but this is not an essential component. It is desirable to provide an inclined surface 3ui of the top plate 3b that slopes outward from the chimney 3s, but this does not preclude the case of forming it as a flat surface. Furthermore, it is desirable to provide a side cover portion 11 on the top plate 3b that covers the upper part Gwpu of the side portion Gwp of the wood group Gw, but this is not an essential component. The upper end cover portion 12 provided on the chimney 3s only needs to have the function of preventing rain from entering the upper end of the chimney 3s, and its configuration and shape are arbitrary. On the other hand, although an example using a flexible container bag 13 has been shown for the heat-insulating sheet portion 4, it can be replaced with heat-insulating sheet portions of various materials and shapes that have similar functions. Therefore, it is possible to implement this using various heat-insulating sheet portions, such as creating a dedicated heat-insulating sheet portion or wrapping a single heat-insulating sheet portion. [Industrial applicability]

[0058] The wood drying apparatus for firewood production according to the present invention can be used to produce firewood for use in wood-burning stoves, outdoor camping, etc., by drying wood. [Explanation of symbols]

[0059] 1: Wood drying device for firewood production, 2: Base section, 2u: Mounting surface section, 2p: Side of base section, 3: Chimney unit section, 3b: Top plate section, 3s: Chimney section, 3ui: Inclined surface, 3sp: Side part of chimney section, 3bu: Top surface part of top plate section, 4: Heat retention sheet section, 4c: Highly heat-absorbing color, 11: Side cover section, 12: Top cover section, 13: Flexible container bag, W…: Firewood, Wo…: Wood, Wos…: One end surface of wood, Sp: Ventilation space, Gw: Group of wood, Gwu: Top surface part of group of wood, Gwp: Side part of group of wood, Gwpu: Upper part of side part of group of wood, Fs: Predetermined interval

Claims

1. A wood drying apparatus for firewood production, comprising: a cylindrical or bag-shaped heat-insulating sheet section for containing a group of wood including multiple pieces of wood cut to a predetermined size, and ensuring ventilation at least at the bottom and top surfaces; a base section of a predetermined height that is breathable and has a mounting surface on which the bottom surface of the heat-insulating sheet containing the group of wood is placed, and has ventilation spaces on its sides; a top plate section that covers the top surface of the group of wood contained in the heat-insulating sheet placed on the base section at predetermined intervals; and a chimney unit section having a chimney section provided in the center or near the top plate section and projecting upward.

2. The wood drying apparatus for firewood production according to claim 1, characterized in that the group of wood includes a plurality of pieces of wood stored in an upright position with one end face facing downwards relative to the heat-insulating sheet portion, or a plurality of pieces of wood stored in a random state.

3. The wood drying apparatus for firewood production according to claim 1, characterized in that the top plate portion has an inclined surface that slopes downward outward from the chimney portion.

4. The wood drying apparatus for firewood production according to claim 1 or 3, characterized in that the top plate portion has a side cover portion that covers the upper part of the side portion of the wood group.

5. The wood drying apparatus for firewood production according to claim 1, characterized in that the chimney section has at least an upper end cover section at its upper end that prevents rain from entering.

6. The wood drying apparatus for firewood production according to claim 1, characterized in that the heat-insulating sheet portion uses a flexible container bag.

7. The wood drying apparatus for firewood production according to claim 1 or 6, characterized in that the heat-insulating sheet portion is colored with a heat-absorbing color that has high heat absorption.

Images