Shaped coal

Abstract

To provide shaped coal having an air hole into which air easily flows.SOLUTION: Shaped coal F1 includes a main body 100, a first protrusion, first air holes H1, and first recesses Re, and has a first surface on one side in a first direction Z and a second surface on the other side Z' in the first direction. The second surface has a first area and a second area adjacent to the first area. The first protrusion is provided on the second area of the second surface of the main body 100 so as to protrude toward the other side Z' in the first direction. The first air holes H1 penetrate in the first direction through the main body 100 from the first surface to a boundary part between the first area and the second area of the second surface. The first recesses Re are provided on an outer peripheral part of the first protrusion, penetrate through the first protrusion in the first direction, are in communication with the first air holes H1, and are recessed on a side opposite to the first area side in a direction generally orthogonal to the first direction Z and are open to the first area side.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to briquettes. [Background technology]

[0002] Patent Document 1 below describes a conventional briquette. This briquette has a cylindrical main body, three legs spaced apart around the outer periphery of the underside of the main body, and multiple air holes that penetrate the main body from top to bottom. Air can flow between the three legs through the space below the main body and into the multiple air holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jikko No. 46-023324 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional briquettes, multiple air vents penetrate the main body and connect to the space below the main body, making it difficult for air that flows into the space below the main body from between the three legs to flow into the multiple air vents.

[0005] The present invention provides charcoal briquettes that allow air to easily flow into the ventilation holes. [Means for solving the problem]

[0006] A charcoal briquettes according to one aspect of the present invention includes a main body, at least one first protrusion, at least one first vent hole, and at least one first recess. The main body has a first surface on one side in a first direction, which is the height direction of the main body, and a second surface on the other side in the first direction. The second surface has a first area and a second area different from the first area and adjacent to the first area. The at least one first protrusion is provided in the second area of the second surface of the main body so as to be convex toward the other side in the first direction. The at least one first vent hole penetrates the main body in the first direction from the first surface to a boundary portion between the first area and the second area of the second surface. The at least one first recess is provided on the outer periphery of the at least one first protrusion, penetrates the at least one first protrusion in the first direction, communicates with the at least one first vent hole, is recessed on the side opposite to the first area in a direction approximately perpendicular to the first direction, and is open to the first area in the approximately perpendicular direction. [Effects of the Invention]

[0007] In the case of the briquettes according to one embodiment of the present invention, the air around the briquettes passes through the space below the first area on the second surface of the main body of the briquettes and hits the wall surface of at least one first recess in the briquettes, making it easier for the air to flow into at least one first air hole that communicates with at least one first recess. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of briquettes according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the coal briquettes of Example 1. [Figure 3] FIG. 2 is a bottom view of the coal briquettes of Example 1. [Figure 4] FIG. 4 is a cross-sectional view of the coal briquettes of Example 1 taken along line 4-4 in FIG. [Figure 5] FIG. 2 is a perspective view of the briquettes of Example 1 as viewed from the bottom side. [Figure 6] FIG. 10 is a front view of charcoal briquettes according to a second embodiment of the present invention. [Figure 7]FIG. 10 is a plan view of the briquettes of Example 2. [Figure 8] FIG. 10 is a bottom view of the briquettes of Example 2. [Figure 9] 9 is a cross-sectional view of the coal briquettes of Example 2 taken along line 9-9 in FIG. 8. FIG. [Figure 10] FIG. 10 is a perspective view of the briquettes of Example 2, as viewed from the bottom side. [Figure 11] FIG. 2 is a front view of a first design modification of the charcoal briquettes of the first embodiment. [Figure 12] FIG. 2 is a plan view of coal briquettes according to a first design modification of the first embodiment. [Figure 13] 13 is a cross-sectional view of the coal briquettes of the first design modification of the first embodiment taken along line 13-13 in FIG. 12. FIG. [Figure 14] FIG. 10 is a front view of a first design modification of the briquettes of Example 2. [Figure 15] FIG. 10 is a plan view of coal briquettes according to a first design modification of the second embodiment. [Figure 16] FIG. 16 is a cross-sectional view of the coal briquettes of the first design modification of the second embodiment taken along line 16-16 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, several embodiments of the present invention will be described, including Examples 1 and 2 and their respective design variations. Note that the components of the examples and design variations described below can be combined with each other as long as they are not inconsistent. Also, note that the materials, shapes, dimensions, numbers, and arrangements of the components in each aspect of the examples and design variations described below are merely examples, and that any design variation is possible as long as the same functions can be achieved. [Example]

[0010] Hereinafter, coal briquettes F1 according to a plurality of examples including Example 1 of the present invention and its design variations will be described with reference to Figs. 1 to 5. Figs. 1 to 5 show the coal briquettes F1 of Example 1. Figs. 1, 4, and 5 show the Z-Z' direction (first direction). The Z-Z' direction includes the Z direction and the Z' direction.

[0011] Briquette charcoal F1 is powdered charcoal made by carbonizing and crushing raw materials (for example, natural fibers (e.g., palm tree or mangrove fibers), sawdust, wood (e.g., cedar, cypress, or other broad-leaved trees), or coffee bean residue, etc.), or powdered charcoal made by mixing binders and water with powdered charcoal made by crushing coal or coke and then pressurizing the powdered charcoal, or powdered charcoal made by pressurizing the raw materials and then carbonizing them.

[0012] The coal briquettes F1 include a main body 100. The main body 100 is, for example, a substantially cylindrical or substantially polygonal columnar portion of the coal briquettes F1. The main body 100 has a first surface 101 on the Z-direction side and a second surface 102 on the Z'-direction side. The second surface 102 has a first area, which is an arbitrary part of the second surface 102, and a second area different from the first area. The first area and the second area are adjacent to each other. For example, the second area can be the central area of the second surface 102, and the first area can be the area surrounding the central area of the second surface 102, but this is not limited to this. The Z-Z' direction is the height direction of the main body 100.

[0013] The coal briquettes F1 further include protrusions 200 (first protrusions). The protrusions 200 are provided in a second area of the second surface 102 and extend convexly in the Z' direction from the second area of the second surface 102. The protrusions 200 can be, for example, substantially cylindrical (see FIGS. 1 to 5), substantially polygonal prism-shaped (not shown), substantially circular ring-shaped (not shown), or substantially polygonal ring-shaped (not shown).

[0014] The projection area of the protrusion 200 in the Z′ direction is smaller than the area of the second surface 102 of the main body 100 .

[0015] The protrusion 200 has a protrusion main body 210. The protrusion main body 210 is in the shape of a generally cylindrical column (see FIGS. 1 to 5), a generally polygonal column (not shown), a generally circular ring (not shown), or a generally polygonal ring (not shown) that protrudes from the second area of the second surface 102 of the main body 100 toward the Z' direction.

[0016] The protrusion 200 may further have a tapered portion 220 around the protrusion main body 210. When the protrusion main body 210 is substantially cylindrical or substantially annular, the outer peripheral surface of the tapered portion 220 has a substantially truncated conical side shape in which the outer diameter of the tapered portion 220 gradually decreases in the Z' direction. When the protrusion main body 210 is substantially polygonal prism or substantially polygonal annular, the outer peripheral surface of the tapered portion 220 has a substantially truncated polygonal pyramid side shape in which the outer diameter of the tapered portion 220 gradually decreases in the Z' direction. When the tapered portion 220 is not provided, the outer peripheral surface of the protrusion main body 210 (the outer peripheral surface of the protrusion 200) is a substantially cylindrical or substantially polygonal tube shape extending in the Z-Z' direction.

[0017] When the tapered portion 220 is provided, the tapered portion 220 may be the outer periphery of the protrusion 200, or the tapered portion 220 and the outer periphery of the protrusion main body 210 may be the outer periphery of the protrusion 200. When the tapered portion 220 is not provided, the outer periphery of the protrusion main body 210 is the outer periphery of the protrusion 200. In either case, the outer periphery of the protrusion 200 has the above-mentioned outer periphery surface.

[0018] When the second area of the main body portion 100 is the central area of the second surface 102, the protrusion 200 may be arranged so that the central axis of the protrusion 200 and the central axis of the main body portion 100 are aligned in approximately a straight line in the Z-Z' direction (the protrusion 200 may be arranged concentrically with the main body portion 100 (see Figures 1 to 5)), or may be arranged so that the central axis of the protrusion 200 and the central axis of the main body portion 100 are misaligned (not shown).

[0019] The protrusion 200 further has a contact surface on the Z' direction side.

[0020] The coal briquettes F1 further include a plurality of first ventilation holes H1. The plurality of first ventilation holes H1 penetrate the main body 100 in the Z-Z' direction from the first surface 101 to the boundary between the first area and the second area of the second surface 102. The plurality of first ventilation holes H1 are, for example, holes in the shape of a substantially polygonal prism (in FIGS. 1 to 5, the first ventilation holes H1 are holes in the shape of a substantially hexagonal prism) or holes in the shape of a substantially cylindrical column, but are not limited thereto. When the plurality of first ventilation holes H1 are holes in the shape of a substantially polygonal prism, the wall surface of the plurality of first ventilation holes H1 is in the shape of a substantially polygonal cylinder. When the plurality of first ventilation holes H1 are holes in the shape of a substantially cylindrical column, the wall surface of the plurality of first ventilation holes H1 is in the shape of a substantially cylindrical column.

[0021] The multiple first ventilation holes H1 have first hole portions H11 and second hole portions H12. The first hole portions H11 penetrate the main body portion 100 in the Z-Z' direction from the first surface 101 to a first area of the second surface 102. The second hole portions H12 penetrate the main body portion 100 in the Z-Z' direction from the first surface 101 to a second area of the second surface 102 and communicate with the first hole portions H11. The wall surfaces of the first hole portions H11 and the second hole portions H12 form the wall surfaces of the first ventilation holes H1. The wall surfaces of the first hole portions H11 are part of the wall surfaces of the first ventilation holes H1 and extend in the Z-Z' direction. The wall surfaces of the second hole portions H12 are the remaining part of the wall surfaces of the first ventilation holes H1 and extend in the Z-Z' direction.

[0022] When the protrusion 200 is provided in the second area, which is the central area of the second surface 102 of the main body 100, the multiple first ventilation holes H1 may be arranged so that the first hole portions H11 are located outward from the protrusion 200. For example, the multiple first ventilation holes H1 may be arranged so that the first hole portions H11 are located around the protrusion 200 at intervals in the circumferential direction of the protrusion 200, but this is not limitative.

[0023] The coal briquette F1 further includes a plurality of recesses Re (first recesses). The number of recesses Re corresponds to the number of first vent holes H1. That is, the recesses Re and the first vent holes H1 correspond to each other one-to-one.

[0024] Each recess Re is provided on the outer periphery of the protrusion 200. Each recess Re penetrates the protrusion 200 in the Z-Z' direction and communicates with the second hole H12 of the corresponding first vent hole H1. If the protrusion 200 has a tapered portion 220, each recess Re may penetrate the tapered portion 220 of the protrusion 200 in the Z-Z' direction (see FIGS. 1 to 5), or may penetrate the outer periphery of the protrusion main body 210 of the protrusion 200 and the tapered portion 220 in the Z-Z' direction (see FIGS. 6 to 10). If the protrusion 200 does not have a tapered portion 220, each recess Re may penetrate the outer periphery of the protrusion main body 210 of the protrusion 200 in the Z-Z' direction (not shown). Each recess Re is located on the Z' direction side of the main body 100.

[0025] When each first air vent H1 is a hole having an approximately polygonal columnar shape, the wall surface of each recess Re has the shape of multiple sides (a smaller number of sides) of all sides of the approximately polygonal ring when viewed from the Z' direction side (an angular approximately U-shape (including an approximately concave shape) or an approximately V-shape).

[0026] When each first air hole H1 is a substantially cylindrical hole, the wall surface of each recess Re has a shape of a part of a substantially circular ring (a substantially arc-shaped or a substantially semicircular shape) when viewed from the Z' direction side.

[0027] Each recess Re is recessed on the side opposite to the first area side of the second surface 102 of the main body 100 in a direction approximately perpendicular to the Z-Z' direction and is open to the first area side in the approximately perpendicular direction. The wall surface of each recess Re extends in the Z' direction from the wall surface of the second hole portion H12 of the corresponding first air hole H1 and faces the first area side.

[0028] When the first hole portions H11 of the multiple first ventilation holes H1 are arranged around the protrusion 200 at intervals in the circumferential direction of the protrusion 200, the multiple recesses Re are also arranged at intervals in the circumferential direction. In this case, the multiple recesses Re are recessed toward the central axis side of the protrusion 200 (the side opposite to the first area side) and are open to the opposite side (the first area side around the protrusion 200).

[0029] The coal briquettes F1 may further include second ventilation holes H2. The second ventilation holes H2 penetrate the main body 100 and the protrusions 200 in the Z-Z' direction from the first surface 101 to the contact surface of the protrusions 200. The second ventilation holes H2 are generally polygonal prism-shaped holes (in FIGS. 1 to 5, the second ventilation holes H2 are generally hexagonal prism-shaped holes) or generally cylindrical holes, but are not limited thereto. The second ventilation holes H2 may be omitted.

[0030] A method for producing the coal briquettes F1 will be described in detail below. First, powdered coal is prepared by carbonizing and pulverizing the raw materials described above, or powdered coal is prepared by pulverizing coal or coke.

[0031] Then, a binder and water are mixed into the powdered coal to form a lump. This powdered coal is placed in a molding die of a press molding machine and press-molded. As a result, the powdered coal is molded into the main body 100 and the protrusions 200, and multiple first convex portions of the molding die penetrate the parts of the powdered coal corresponding to the main body 100 and the parts corresponding to the outer periphery of the protrusions 200 in the Z-Z' direction and partially cut out the parts of the powdered coal corresponding to the outer periphery of the protrusions 200, thereby forming multiple first ventilation holes H1 in the main body 100 and multiple recesses Re in the outer periphery of the protrusions 200. If the coal briquette F1 has second ventilation holes H2, the second convex portions of the molding die penetrate the main body 100 and the protrusions 200 in the Z-Z' direction during press-molding, thereby forming second ventilation holes H2 in the main body 100 and the protrusions 200.

[0032] Alternatively, the raw material is placed in a molding die of a pressure molding machine and pressure-molded. As a result, the raw material is molded into the shape of the main body 100 and the protrusions 200, and multiple first protrusions of the molding die penetrate the portion of the raw material corresponding to the main body 100 and the portion corresponding to the outer periphery of the protrusions 200 in the Z-Z' direction and cut out the portion of the raw material corresponding to the outer periphery of the protrusions 200, thereby forming multiple first ventilation holes H1 in the portion of the raw material corresponding to the main body 100 and multiple recesses Re in the portion of the raw material corresponding to the outer periphery of the protrusions 200. If the coal briquettes F1 have second ventilation holes H2, multiple second ventilation holes H2 are formed in the portions of the raw material corresponding to the main body 100 and the protrusions 200 by the second protrusions of the molding die penetrating the raw material in the Z-Z' direction during pressure molding. The pressure-molded raw material is then carbonized.

[0033] The briquettes F1 are produced in the above manner.

[0034] A method of using the charcoal briquettes F1 will be described in detail below. The charcoal briquettes F1 are placed on the placing portion P so that the contact surface of the protrusion 200 is in contact with the placing portion P (for example, on a grate in the fire bed of a barbecue grill, a grate in the fire bed of a fire pit, the bottom of the fire bed of a barbecue grill, the bottom of the fire bed of a fire pit, a heat-resistant plate, or the ground). In this state, a ventilation space S is defined by the first area of the second surface 102 of the main body 100 of the charcoal briquettes F1, the placing portion P, and the protrusion 200. The ventilation space S is adjacent to the protrusion 200 below the first area. The multiple recesses Re of the charcoal briquettes F1 are open to the ventilation space S side (first area side), and the wall surfaces of the multiple recesses Re face the ventilation space S side (first area side). When the protrusion 200 is provided in the second area, which is the central area of the second surface 102 of the main body 100, the ventilation space S becomes an approximately annular space around the protrusion 200 below the first area, and the multiple recesses Re are open to the ventilation space S side, and the wall surfaces of the multiple recesses Re face the ventilation space S side.

[0035] Thereafter, the coal briquette F1 is ignited. Then, the air around the coal briquette F1 flows into the plurality of recesses Re of the coal briquette F1 through the ventilation space S below the first area, hits the wall surfaces of the plurality of recesses Re, and flows into the plurality of first air holes H1 of the coal briquette F1. The air that has flowed into the plurality of first air holes H1 of the coal briquette F1 rises inside the plurality of first air holes H1 due to the chimney effect.

[0036] The above-described coal briquettes F1 have the following technical features and effects (1) to (5).

[0037] (1) The air around the coal briquette F1 flows in from the ventilation space S and hits the wall surfaces of the recesses Re of the coal briquette F1, and therefore easily flows into the first ventilation holes H1. Therefore, a chimney effect is easily generated in the first ventilation holes H1 of the coal briquette F1, and as a result, the combustion efficiency of the coal briquette F1 is improved.

[0038] (2) When the protrusion 200 is provided in the second area, which is the central area of the second surface 102 of the main body 100, and the plurality of recesses Re are arranged at intervals in the circumferential direction of the protrusion 200, a ventilation space S is formed around the protrusion 200, and the plurality of recesses Re are open to the ventilation space S side, so that air around the coal briquette F1 flows in from the ventilation space S and hits the wall surfaces of the plurality of recesses Re, and is likely to flow into the plurality of first vent holes H1. Therefore, a chimney effect is likely to occur in the plurality of first vent holes H1 around the protrusion 200 of the coal briquette F1, and as a result, the combustion efficiency of the coal briquette F1 is further improved.

[0039] (3) When the placement portion P on which the charcoal briquettes F1 are placed is a grate in the fire bed of a barbecue grill or a fire pit, air flows in from the Z' direction side of the charcoal briquettes F1 through the holes or mesh of the grate. However, when the placement portion P is flat (for example, the bottom of the fire bed of a barbecue grill, the bottom of the fire bed of a fire pit, a heat-resistant plate, or the ground), air does not flow in from the Z' direction side of the charcoal briquettes F1 through the placement portion P. However, when the contact surfaces of the protrusions 200 are in contact with the placement portion P, a ventilation space S is formed below the first area of the second surface 102 of the main body 100. Therefore, air around the charcoal briquettes F1 flows in from the ventilation space S, hits the wall surfaces of the multiple recesses Re, and flows into the multiple first air holes H1. Therefore, the charcoal briquettes F1 are easy to burn even when the placement portion P is flat.

[0040] (4) The coal briquettes F1 can be easily produced. During pressure molding, the multiple first convex portions of the molding die penetrate the portion of the powder coal corresponding to the main body 100 and the portion corresponding to the outer periphery of the protrusions 200 in the Z-Z′ direction and partially cut out the portion of the powder coal corresponding to the outer periphery of the protrusions 200, thereby forming multiple first ventilation holes H1 in the main body 100 and multiple recesses Re in the outer periphery of the protrusions 200, or the multiple first convex portions of the molding die penetrate the portion of the raw material corresponding to the main body 100 and the portion of the raw material corresponding to the outer periphery of the protrusions 200 and cut out the portion of the raw material corresponding to the outer periphery of the protrusions 200, thereby forming multiple first ventilation holes H1 in the portion of the raw material corresponding to the main body 100 and multiple recesses Re in the portion of the raw material corresponding to the outer periphery of the protrusions 200.

[0041] (5) When the protrusion 200 is provided with the tapered portion 220, the molded protrusion 200 or the portion of the raw material corresponding to the protrusion 200 can be easily removed from the molding die of the pressure molding machine. [Example]

[0042] Hereinafter, coal briquettes F2 according to a plurality of examples including Example 2 of the present invention and its design variations will be described with reference to Figs. 6 to 10. Figs. 6 to 10 show the coal briquettes F2 of Example 2. Figs. 6, 9, and 10 show the Z-Z' direction.

[0043] The coal briquette F2 has the same configuration as the coal briquette F1 except that the configurations of the plurality of first air holes H1 and the plurality of recesses Re are different from those of the plurality of first air holes H1 and the plurality of recesses Re of the coal briquette F1. Only the differences will be described in detail below, and the description of the coal briquette F2 that overlaps with the description of the coal briquette F1 will be omitted. Note that the Z-Z' direction (first direction) is shown in Figures 6, 8, and 10.

[0044] When the plurality of first air holes H1 of the coal briquette F2 are substantially cylindrical, the plurality of first air holes H1 of the coal briquette F2 differ from the plurality of first air holes H1 of the coal briquette F2 in that they are substantially elliptical elongated holes whose longitudinal direction is longer than their lateral direction when viewed from the Z direction side. When the plurality of first air holes H1 of the coal briquette F2 are substantially polygonal columnar, the plurality of first air holes H1 of the coal briquette F2 differ from the plurality of first air holes H1 of the coal briquette F2 in that they are substantially polygonal elongated holes whose longitudinal direction is longer than their lateral direction when viewed from the Z direction side. The longitudinal direction is substantially perpendicular to the Z-Z' direction and extends outward from the protrusion 200. The lateral direction is substantially perpendicular to the Z-Z' direction and the longitudinal direction.

[0045] When the protrusion 200 is provided in the second area, which is the central area of the second surface 102 of the main body 100, the longitudinal directions of the multiple first ventilation holes H1 may extend radially from the central axis of the protrusion 200. In this case, the multiple first ventilation holes H1 extend radially from the central axis of the protrusion 200 when viewed from the Z direction side, and the multiple first ventilation holes H1 are arranged such that the first hole portions H11 are positioned around the protrusion 200 at intervals in the circumferential direction of the protrusion 200.

[0046] When the multiple first air holes H1 are elongated holes having a substantially elliptical shape when viewed from the Z direction side, the wall surfaces of the multiple first air holes H1 are substantially elliptical cylindrical, and the wall surfaces of the first hole portions H11 and the second hole portions H12 in the wall surfaces of the multiple first air holes H1 are substantially U-shaped when viewed from the Z direction side. When the multiple first air holes H1 are elongated holes having a substantially polygonal shape when viewed from the Z direction side, the wall surfaces of the multiple first air holes H1 are substantially polygonal cylindrical, and the wall surfaces of the first hole portions H11 and the second hole portions H12 in the wall surfaces of the multiple first air holes H1 are angular, substantially U-shaped (including substantially concave-shaped) or substantially V-shaped when viewed from the Z direction side.

[0047] When the tapered portion 220 of the protrusion 200 is provided, each recess Re may penetrate the tapered portion 220 of the protrusion 200 in the Z-Z' direction (not shown), or may penetrate the outer periphery of the protrusion main body 210 of the protrusion 200 and the tapered portion 220 in the Z-Z' direction (see FIGS. 6 to 10). When the tapered portion 220 of the protrusion 200 is not provided, each recess Re may penetrate the outer periphery of the protrusion main body 210 of the protrusion 200 in the Z-Z' direction (not shown).

[0048] When each first air hole H1 is a substantially cylindrical hole, the wall surface of each recess Re has a shape of a part of a substantially circular ring (a substantially arc-shaped, a substantially semicircular, or a U-shaped) when viewed from the Z' direction side.

[0049] When each first air vent H1 is a hole having an approximately polygonal columnar shape, the wall surface of each recess Re has the shape of multiple sides (a smaller number of sides) of all sides of the approximately polygonal ring when viewed from the Z' direction side (an angular approximately U-shape (including an approximately concave shape) or an approximately V-shape).

[0050] The coal briquettes F2 may further include a plurality of third vent holes H3. The plurality of third vent holes H3 penetrate the main body 100 in the Z-Z' direction from the first surface 101 to the second surface 102. The plurality of third vent holes H3 are, but are not limited to, holes in the shape of a substantially polygonal pillar (not shown) or a substantially cylindrical pillar (see FIGS. 6 to 10). The plurality of third vent holes H3 may be omitted.

[0051] The above-mentioned coal briquettes F2 are produced in the same manner as the above-mentioned coal briquettes F1. When the coal briquettes F2 are provided with a plurality of third vent holes H3, the plurality of third convex portions of the molding die penetrate the portion of the powder coal corresponding to the main body 100 in the Z-Z' direction during pressure molding, thereby forming a plurality of third vent holes H3 in the main body 100, or the plurality of third convex portions of the molding die penetrate the portion of the raw material corresponding to the main body 100 in the Z-Z' direction during pressure molding, thereby forming a plurality of third vent holes H3 in the portion of the raw material corresponding to the main body 100.

[0052] A method of using the above-mentioned coal briquettes F2 will be described in detail below. The coal briquettes F2 are placed on the placement portion P so that the contact surface of the protrusion 200 is in contact with the placement portion P. In this state, a ventilation space S is defined by the first area of the second surface 102 of the main body portion 100 of the coal briquettes F2, the placement portion P, and the protrusion 200. The ventilation space S is adjacent to the protrusion 200 below the first area. The multiple recesses Re of the coal briquettes F2 are open to the ventilation space S side (first area side), and the wall surfaces of the multiple recesses Re face the ventilation space S side (first area side). When the protrusion 200 is provided in the second area, which is the central area of the second surface 102 of the main body portion 100, the ventilation space S becomes a substantially annular space around the protrusion 200 below the first area, and the multiple recesses Re are open to the ventilation space S side, and the wall surfaces of the multiple recesses Re face the ventilation space S side. When a plurality of third ventilation holes H3 are provided, the plurality of third ventilation holes H3 are located on the Z direction side of the ventilation space S and communicate with the ventilation space S.

[0053] Thereafter, the coal briquette F2 is ignited. Then, the air around the coal briquette F2 flows through the ventilation space S into the plurality of recesses Re of the coal briquette F2, hits the wall surfaces of the plurality of recesses Re, and flows into the plurality of first vent holes H1 of the coal briquette F2. The air that has flowed into the plurality of first vent holes H1 of the coal briquette F2 rises inside the plurality of first vent holes H1 due to the chimney effect. When the plurality of third vent holes H3 are provided, part of the air that has flowed into the ventilation space S flows into the plurality of third vent holes H3 and rises inside the plurality of third vent holes H3 due to the chimney effect.

[0054] The coal briquettes F2 as described above have the same technical features and effects as the (1) to (5) technical features and effects of the coal briquettes F1.

[0055] Furthermore, when a plurality of third vent holes H3 are provided, a portion of the air flowing into the ventilation space S flows into the plurality of third vent holes H3 and rises inside the plurality of third vent holes H3 due to the chimney effect, thereby further improving the combustion efficiency of the coal briquette F2.

[0056] The coal briquettes described above are not limited to those in the above-described embodiment, and can be arbitrarily modified in design within the scope of the claims. This will be described in detail below. Figs. 11 to 13 show a coal briquette F1', which is a first design modification of the coal briquette F1 in Example 1, and Figs. 14 to 16 show a coal briquette F2', which is a first design modification of the coal briquette F2 in Example 2.

[0057] The coal briquettes F1' and F2' differ from the coal briquettes F1 and F2 in that they further include protrusions 200' (second protrusions). The differences will be described in detail below, and overlapping descriptions will be omitted.

[0058] The main body 100 of the coal briquettes F1', F2' has substantially the same configuration as the main body 100 of the coal briquettes F1, F2, except that the first surface 101 has a first area and a second area different from the first area. The first area and the second area of the first surface 101 are adjacent to each other. The first area of the first surface 101 may have the same shape and area as the first area of the second surface 102 and may be arranged so as to overlap the first area of the second surface 102 in the Z-Z' direction, and the second area of the first surface 101 may have the same shape and area as the second area of the second surface 102 and may be arranged so as to overlap the second area of the second surface 102 in the Z-Z' direction, but is not limited to this. For example, if the second area of the second surface 102 is the central area of the second surface 102 and the first area of the second surface 102 is the area surrounding the central area of the second surface 102, the second area of the first surface 101 can be the central area of the first surface 101 and the first area of the first surface 101 can be the area surrounding the central area of the first surface 101.

[0059] The protrusions 200' of the coal briquettes F1', F2' can have the same configuration as the protrusions 200, except that they are provided in the second area of the first surface 101 of the main body 100 and extend convexly in the Z direction from the second area of the first surface 101. The projected area of the protrusions 200' in the Z direction is smaller than the area of the first surface 101 of the main body 100.

[0060] The outer shape and dimensions of the protrusion 200' may be substantially the same as those of the protrusion 200, and the protrusion 200' may be disposed so that the entire protrusion 200 overlaps the entire protrusion 200 in the Z-Z' direction. Alternatively, the outer shape and dimensions of the protrusion 200' may be different from those of the protrusion 200, and the protrusion 200' may be disposed so that the protrusion 200' partially overlaps the protrusion 200 in the Z-Z' direction. The protrusion main body 210' of the protrusion 200' may be, for example, a substantially cylindrical (see FIGS. 11 to 16), substantially polygonal prism (not shown), substantially circular (not shown), or substantially polygonal ring (not shown) shape that protrudes from the second area of the first surface 101 of the main body 100 toward the Z direction. A tapered portion 220' may be provided around the protrusion main body 210' of the protrusion 200'. When the protrusion main body 210' is substantially cylindrical or substantially circular, the outer peripheral surface of the tapered portion 220' has a substantially truncated conical side shape in which the outer diameter of the tapered portion 220' gradually decreases in the Z direction. When the protrusion main body 210' is substantially polygonal prism or substantially polygonal ring, the outer peripheral surface of the tapered portion 220' has a substantially truncated polygonal pyramid side shape in which the outer diameter of the tapered portion 220' gradually decreases in the Z direction. When the tapered portion 220' is not provided, the outer peripheral surface of the protrusion main body 210' (the outer peripheral surface of the protrusion 200') is a substantially cylindrical or substantially polygonal tube shape extending in the Z-Z' direction.

[0061] When the second area of the first surface 101 of the main body portion 100 is the central area of the first surface 101, the protrusion 200' may be arranged so that the central axis of the protrusion 200' and the central axis of the main body portion 100 are aligned in approximately a straight line in the Z-Z' direction (the protrusion 200' may be arranged concentrically with the main body portion 100 (see Figures 11 to 16)), or may be arranged so that the central axis of the protrusion 200' and the central axis of the main body portion 100 are misaligned (not shown).

[0062] The protrusion 200' further has an abutment surface on the Z direction side.

[0063] The multiple first air holes H1 of the coal briquettes F1', F2' have substantially the same configuration as the multiple first air holes H1 of the coal briquettes F1, F2, except that they penetrate the main body 100 in the Z-Z' direction from the boundary between the first area and the second area of the first surface 101 to the boundary between the first area and the second area of the second surface 102. First hole portions H11 of the multiple first air holes H1 of the multiple first air holes H1 of the multiple first air holes H1 of the coal briquettes F1', F2' penetrate the main body 100 in the Z-Z' direction from the first area of the first surface 101 to the first area of the second surface 102. Second hole portions H12 of the multiple first air holes H1 of the multiple first air holes H1 of the multiple coal briquettes F1', F2' penetrate the main body 100 in the Z-Z' direction from the second area of the first surface 101 to the second area of the second surface 102, and are in communication with the first hole portions H11. When the protrusion 200' is provided in the second area, which is the central area of the first surface 101 of the main body 100, the multiple first ventilation holes H1 may be arranged so that the first hole portions H11 are located outward from the protrusion 200 and the protrusion 200'. For example, the multiple first ventilation holes H1 may be arranged so that the first hole portions H11 are located around the protrusion 200 and the protrusion 200' at intervals in the circumferential direction of the protrusion 200, but are not limited to this.

[0064] The coal briquettes F1' and F2' may further include a plurality of recesses Re' (second recesses). The plurality of recesses Re' and the plurality of first vent holes H1 correspond one-to-one. Each recess Re' has substantially the same configuration as each recess Re, except that it is provided on the outer periphery of the protrusion 200'. Each recess Re' penetrates the protrusion 200' in the Z-Z' direction and communicates with the second hole H12 of the corresponding first vent hole H1. When the protrusion 200' is provided with a tapered portion 220', each recess Re' may penetrate the tapered portion 220' of the protrusion 200' in the Z-Z' direction (see FIGS. 11 to 13), or may penetrate the outer periphery of the protrusion main body 210' and the tapered portion 220' of the protrusion 200' in the Z-Z' direction (see FIGS. 14 to 16). When the tapered portion 220' of the protrusion 200' is not provided, each recess Re' may penetrate the outer periphery of the protrusion main body 210' of the protrusion 200' in the Z-Z' direction (not shown). Each recess Re' is located on the Z-direction side of the main body 100.

[0065] Each recess Re' is recessed on the side opposite to the first area side of the first surface 101 of the main body 100 in the approximately perpendicular direction and is open to the first area side of the first surface 101 in the approximately perpendicular direction. The wall surface of each recess Re' extends in the Z direction from the wall surface of the second hole portion H12 of the corresponding first air hole H1 and faces the first area side of the first surface 101.

[0066] When the first hole portions H11 of the multiple first ventilation holes H1 are arranged at intervals in the circumferential direction around the protrusion 200 and the protrusion 200', the multiple recesses Re' are also arranged at intervals in the circumferential direction. In this case, the multiple recesses Re' are recessed toward the central axis side of the protrusion 200' (the side opposite to the first area side) and are open to the opposite side (the first area side around the protrusion 200').

[0067] The above-mentioned coal briquettes F1', F2' may be placed on the mounting portion P so that the contact surfaces of the protrusions 200 abut against the mounting portion P, or the coal briquettes F1', F2' may be placed on the mounting portion P so that the contact surfaces of the protrusions 200' abut against the mounting portion P. With the contact surfaces of the protrusions 200' abutting against the mounting portion P, a ventilation space S is defined by the first area of the first surface 101 of the main body 100 of the coal briquettes F1', F2', the mounting portion P, and the protrusions 200'. The ventilation space S is adjacent to the protrusions 200' below the first area of the first surface 101. When multiple recesses Re' are provided in the coal briquettes F1', F2', the multiple recesses Re' are open to the ventilation space S side (first area side), and the wall surfaces of the multiple recesses Re' face the ventilation space S side (first area side). When the protrusion 200′ is provided in the second area, which is the central area of the first surface 101 of the main body 100, the ventilation space S becomes a substantially annular space around the protrusion 200′ below the first area, and the multiple recesses Re′ are open to the ventilation space S side, and the wall surfaces of the multiple recesses Re′ face the ventilation space S side. When the multiple third ventilation holes H3 are provided in the coal briquette F2′, the multiple third ventilation holes H3 communicate with the ventilation space S.

[0068] When the coal briquettes F1', F2' are ignited, the air around the coal briquettes F1', F2' flows through the ventilation space S into the plurality of recesses Re' of the coal briquettes F1', F2', hits the wall surfaces of the plurality of recesses Re', and flows into the plurality of first vent holes H1 of the coal briquettes F1', F2'. The air that has flowed into the plurality of first vent holes H1 of the coal briquettes F1', F2' rises inside the plurality of first vent holes H1 due to the chimney effect. Therefore, air is likely to flow into the plurality of first vent holes H1 not only when the coal briquettes F1', F2' are placed on the mounting portion P so that the contact surfaces of the protrusions 200' abut against the mounting portion P, but also when the coal briquettes F1', F2' are placed on the mounting portion P so that the contact surfaces of the protrusions 200' abut against the mounting portion P. Note that the plurality of recesses Re' may be omitted.

[0069] A plurality of the protrusions 200 in any of the above-described embodiments may be provided in the second area of the second surface 102 of the main body portion 100. A plurality of the protrusions 200' in any of the above-described embodiments may be provided in the second area of the first surface 101 of the main body portion 100. The shape of each of the plurality of protrusions 200 and / or 200' is arbitrary, and may be, for example, a substantially cylindrical, polygonal, arc-shaped, semicircular, L-shaped, V-shaped, or U-shaped. The plurality of protrusions 200 may be arranged opposite each other, may be arranged line-symmetrically with respect to a first imaginary line, or may be arranged in a substantially circular shape. The plurality of protrusions 200' may be arranged opposite each other, may be arranged line-symmetrically with respect to a virtual line, or may be arranged in a substantially circular shape. The first imaginary line may extend along the second surface 102 of the main body portion 100. The second imaginary line may extend along the first surface 101 of the main body portion 100.

[0070] It is sufficient that at least one first ventilation hole H1 in any of the above-described embodiments is provided in the main body 100.

[0071] When there is one first air vent H1, it is sufficient that one recess Re of any of the above-described embodiments is provided in the protrusion 200. The recess Re of any of the above-described embodiments is provided on the outer periphery of the protrusion 200, penetrates the protrusion 200 in the Z-Z' direction, communicates with the second hole portion H12 of the first air vent H1, is recessed on the side opposite to the first area side of the second surface 102 in a direction approximately perpendicular to the Z-Z' direction, and is open to the first area side of the second surface 102 in the approximately perpendicular direction.

[0072] When there is one first air vent H1, it is sufficient that one recess Re' of any of the above-described embodiments is provided in the protrusion 200'. The recess Re' of any of the above-described embodiments is provided on the outer periphery of the protrusion 200', penetrates the protrusion 200' in the Z-Z' direction, communicates with the second hole H12 of the first air vent H1, is recessed on the side opposite to the first area side of the first surface 101 in a direction approximately perpendicular to the Z-Z' direction, and is open to the first area side of the first surface 101 in the approximately perpendicular direction.

[0073] In the coal briquettes F1 and F2, the recess Re can be omitted. In this case, the first air hole H1 in any of the above-described embodiments penetrates the main body 100 of the coal briquettes F1 and F2 in the Z-Z' direction from the first surface 101 to the first area of the second surface 102, and the edge of the first air hole H1 on the Z'-direction side and on the protrusion 200 side as viewed from the Z'-direction side is in contact with or located in the vicinity of the outer circumferential surface of the protrusion 200. A part of the outer circumferential surface of the protrusion 200 faces the first area side (ventilation space S side) of the second surface 102 of the main body 100. When the coal briquettes F1 and F2 designed and modified in this way are ignited, the air around the coal briquettes F1 and F2 passes through the ventilation space S below the first area of the second surface 102 of the main body 100, hits a part of the outer circumferential surface of the protrusion 200, and flows into the multiple first air holes H1.

[0074] In the coal briquettes F1' and F2', the recesses Re and Re' can be omitted. In this case, the first air hole H1 in any of the above-described embodiments penetrates the main body 100 of the coal briquettes F1' and F2' in the Z-Z' direction from the first surface 101 to the first area of the second surface 102, and when viewed from the Z' direction, the edge of the first air hole H1 on the Z' direction side and the protrusion 200 side is in contact with or located near the outer circumferential surface of the protrusion 200, and when viewed from the Z direction side, the edge of the first air hole H1 on the Z direction side and the protrusion 200' side is in contact with or located near the outer circumferential surface of the protrusion 200'. A part of the outer circumferential surface of the protrusion 200 faces the first area side (ventilation space S side) of the second surface 102 of the main body 100, and a part of the outer circumferential surface of the protrusion 200' faces the first area side (ventilation space S side) of the first surface 101 of the main body 100. When the charcoal briquettes F1', F2' designed and modified in this manner are ignited, when the contact surface of the protrusion 200 is brought into contact with the mounting portion P, the air around the charcoal briquettes F1', F2' passes through the ventilation space S below the first area of the second surface 102 of the main body 100, hits a part of the outer surface of the protrusion 200, and flows into the multiple first ventilation holes H1, and when the contact surface of the protrusion 200' is brought into contact with the mounting portion P, the air around the charcoal briquettes F1', F2' passes through the ventilation space S below the first area of the first surface 101 of the main body 100, hits a part of the outer surface of the protrusion 200', and flows into the multiple first ventilation holes H1.

[0075] The plurality of third ventilation holes H3 may be provided in the main body 100 of the coal briquette F1 or F1'. [Industrial Applicability]

[0076] The present invention is applicable to solid fuels other than the above-mentioned briquettes. [Explanation of symbols]

[0077] F1, F2: Briquette coal 100: Main body 101: 1st side 102: 2nd side 200: 1st protrusion 210: Protrusion body 220: Tapered portion 200': 2nd protrusion 210': Protrusion body 220': Tapered portion H1: First ventilation hole H2: Second ventilation hole H3: Third ventilation hole Re: First recess Re': Second recess S: Ventilation space P: Placement section

Claims

1. The device includes a body portion, at least one first protrusion, at least one first vent hole, and at least one first recess, the main body portion has a first surface on one side in a first direction which is a height direction of the main body portion, and a second surface on the other side in the first direction, the second surface has a first area and a second area different from the first area and adjacent to the first area; the at least one first protrusion is provided in the second area of the second surface of the main body portion so as to protrude toward the other side in the first direction, the at least one first air hole penetrates the main body in the first direction from the first surface to a boundary portion between the first area and the second area of the second surface, The at least one first recess is provided on the outer periphery of the at least one first protrusion, penetrates the at least one first protrusion in the first direction, communicates with the at least one first air hole, is recessed on the side opposite to the first area in a direction approximately perpendicular to the first direction, and is open to the first area side in the approximately perpendicular direction.

2. The briquettes according to claim 1, the second area of the second surface of the main body portion is a central area of the second surface of the main body portion, and the first area of the second surface of the main body portion is a peripheral area of the second area, The at least one first air vent has a first hole portion and a second hole portion, the first hole portion penetrates the main body portion in the first direction from the first surface to the first area of the second surface, the second hole portion penetrates the main body portion in the first direction from the first surface to the second area of the second surface and communicates with the first hole portion; the at least one first vent hole is arranged such that the first hole portion is positioned outward relative to the at least one first protrusion; The at least one first recess communicates with the second hole portions of the plurality of first air holes.

3. The briquettes according to claim 2, the at least one first vent hole is a plurality of holes; the plurality of first ventilation holes are arranged such that the first hole portions are located around the at least one first protrusion at intervals in a circumferential direction of the at least one first protrusion, the at least one first recess is plural; The plurality of first recesses are arranged at intervals in the circumferential direction.

4. The briquettes according to claim 1, The at least one first projection has a projection body and a tapered portion provided around the projection body.

5. The briquettes according to any one of claims 1 to 4, the at least one first protrusion has a contact surface on the other side in the first direction, a ventilation space is defined by the first area on the second surface of the main body, the mounting portion, and the at least one first protrusion when the abutment surface of the at least one first protrusion is in contact with the mounting portion; The at least one first recess is open to the ventilation space.

6. The briquettes according to claim 1, further comprising at least one second protrusion and at least one second recess; the first surface of the main body portion has a first area and a second area different from the first area of the first surface and adjacent to the first area of the first surface; the at least one second protrusion is provided in the second area of the first surface of the main body portion so as to protrude toward one side in the first direction, the at least one first air hole penetrates the main body in the first direction from a boundary between the first area and the second area on the first surface to a boundary between the first area and the second area on the second surface, The at least one second recess is provided on the outer periphery of the at least one second protrusion, penetrates the at least one second protrusion in the first direction, communicates with the at least one first air hole, is recessed on the side opposite to the first area side of the first surface in the approximately perpendicular direction, and is open to the first area side of the first surface in the approximately perpendicular direction.

7. The briquettes according to claim 6, the second area of the first surface of the main body is a central area of the first surface of the main body, and the first area of the first surface of the main body is an area surrounding the second area, the second area of the second surface of the main body portion is a central area of the second surface of the main body portion, and the first area of the second surface of the main body portion is a peripheral area of the second area, The at least one first vent hole has a first hole portion and a second hole portion, the first hole portion penetrates the main body portion in the first direction from the first area of the first surface to the first area of the second surface, the second hole portion penetrates the main body portion in the first direction from the second area of the first surface to the second area of the second surface and communicates with the first hole portion; the at least one first ventilation hole is arranged such that the first hole portion is located outward relative to the at least one first protrusion and the at least one second protrusion; The at least one first recess and the at least one second recess communicate with the second hole portions of the plurality of first air holes.

8. The briquettes according to claim 7, the at least one first vent hole is a plurality of holes; the plurality of first vent holes are arranged such that the first hole portions are positioned around the at least one first protrusion at intervals in a circumferential direction of the at least one first protrusion and are positioned around the at least one second protrusion at intervals in the circumferential direction, the at least one first recess is plural; The plurality of first recesses are arranged at intervals in the circumferential direction, the at least one second recess is plural, The plurality of second recesses are arranged at intervals in the circumferential direction.

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