Firewood grill and use method thereof

Abstract

To provide a firewood grill capable of evenly adjusting an air supply amount to firewood or charcoal, and also performing adjustment so that almost no smoke or soot is generated, thereby reducing the adhesion of soot to a cooker and influence on human body and environment, and further capable of making smoking possible.SOLUTION: A firewood grill 1 comprises: a combustion container 2 including a bottom wall 3 on which firewood or charcoal is placed and a cylindrical side wall 4, and having air holes 7, 8 in the bottom wall 3 and the side wall 4; a cylindrical cover 10 that covers the side wall 4 with a gap; an annular port 13 that allows air to flow into the cover 10 from around a lower end or upper end of the cover 10; and an air adjustment mechanism 20 that adjusts an inflow amount of the air by changing the height of the annular port 13.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a wood grill, which is a cooking appliance for burning wood or charcoal.

Background Art

[0002] As a cooking appliance that can use wood or charcoal as fuel, for example, Patent Document 1 describes a simple stove including a trapezoidal side plate provided with a burning port and a bottom plate for placing wood provided with a large number of ventilation holes. A large number of ventilation holes are provided in the side plate below the bottom plate mounting position. It is said that when wood is placed on the bottom plate and burned, external air is sufficiently supplied into the stove body through the large number of ventilation holes in the side plate, and the wood can be burned effectively. However, there is no description about adjusting the amount of air supplied to the wood.

[0003] Therefore, when cooking by burning wood, depending on the amount of air supplied, there is a problem that a large amount of smoke and soot are generated, the stove is soiled with soot, the human body is affected, and the environment is polluted.

[0004] Further, Patent Document 2 describes a combustion appliance for cooking etc. including a bottomed cylindrical main body, a combustion chamber cylinder located above the bottom of the main body and fixed inside so as to have a gap with the wall surface of the main body, and a bottom net supported inside the lower part of the combustion chamber cylinder. An air intake port and a door for freely opening and closing it are provided at a position lower than the bottom net on the side wall of the main body. It is said that when wood is placed on the bottom net and burned, the amount of oxygen can be adjusted according to the type of fuel by adjusting the opening and closing amount of the air intake port.

[0005] However, in the mechanism for adjusting the opening and closing amount of the air intake port provided at one location on the side wall by moving the door, there are problems such as that the amount of air supplied to the wood can only be adjusted from the direction where the air intake port is located, and it is difficult to uniformly adjust the amount of air supplied to the wood on the bottom net because the air flow is deflected.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] Therefore, an object of the present invention is to be able to uniformly adjust the amount of air supplied to firewood or charcoal, thereby enabling adjustment such that almost no smoke and soot are generated, reducing the adhesion of soot to the cooker and the impact on the human body and the environment. Further, it is to enable the adjustment operation of the amount of air supplied to firewood or charcoal from any direction of the firewood grill. Furthermore, it is to enable smoking with a predetermined lid.

Means for Solving the Problems

[0008] The inventor, due to the failure in the process of developing means for solving the above problems and being unable to reduce both smoke and soot by improving on the conventional extension cord, various means completely different from the conventional ones were studied, leading to the following present invention.

[0009] [1] A firewood grill comprising a bottom wall on which firewood or charcoal is placed and a cylindrical side wall, the combustion container having air holes in the bottom wall and the side wall, a cylindrical cover covering the side wall with a gap, an annular port for allowing air to flow into the cover from around the lower end or the upper end of the cover, and an air adjustment mechanism for adjusting the inflow amount of the air by changing the height of the annular port is provided.

[0010] [2] The firewood grill according to [1], wherein the annular port is between the lower end of the cover and a tray facing the lower end from below.

[0011] [3] The firewood grill according to [1], wherein the annular port is between the upper end of the cover and the enlarged diameter portion at the upper part of the side wall.

[0012] [4] The firewood grill according to any one of [1] to [3], wherein the cover has a ring-shaped wall bent inward from the lower end.

[0013] [5] The firewood grill according to any one of [1] to [4], wherein the air adjustment mechanism is a screw-type mechanism that rotates a screw together with the combustion container to change the height of the annular opening.

[0014] [6] The firewood grill according to [5], further comprising a manual rotation jig detachably engaged with the combustion container.

[0015] [7] The firewood grill according to any one of [1] to [6], further comprising a perforated lid covering the combustion container.

[0016] [8] A combustion container including a bottom wall on which firewood or charcoal is placed and a cylindrical side wall, the bottom wall and the side wall having air holes, a cylindrical cover covering the side wall with a gap therebetween, an annular opening for allowing air to flow into the cover from around the lower end or the upper end of the cover, an air adjustment mechanism for adjusting the inflow amount of the air by changing the height of the annular opening, and a firewood grill comprising the same is used, A method of using a firewood grill, wherein the air supply amount to the combustion container through the air holes in both the bottom wall and the side wall is simultaneously adjusted by changing the height of the annular opening by an air adjustment mechanism to adjust the inflow amount of the air.

[0017] [9] The method of using a firewood grill according to [8], wherein a strong fire is created by adjusting the air supply amount.

[0018]

[10] The method of using a firewood grill according to [8], wherein smoke is generated from the firewood by covering the combustion container with a perforated lid.

Advantages of the Invention

[0019] According to the present invention, the air supply amount to firewood or charcoal can be uniformly adjusted, so that it is also possible to adjust so that almost no smoke and soot are generated, and the adhesion of soot to the cooker and the influence on the human body and the environment can be reduced. Further, the air conditioning mechanism is a screw type mechanism, and the air supply amount to firewood or charcoal can be adjusted from any direction of the firewood grill. Furthermore, smoking is also possible with a predetermined lid.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0021] 1. Combustion container The material of the combustion container is not particularly limited, and examples thereof include metal, ceramics, and the like. Stainless steel is preferable for the metal. The bottomed cylindrical shape of the combustion container is preferably a bottomed cylindrical shape, but a bottomed rectangular cylindrical shape may also be used. The dimensions of the combustion container are not particularly limited, but the outer diameter is preferably 80 to 300 mm, and the height is preferably 30 to 150 mm. The upper part of the combustion container is preferably a diameter-expanded part. The shape of the air hole is not particularly limited, and examples thereof include round holes, square holes, and slit holes.

[0022] 2. Cover The material of the cover is not particularly limited, and examples thereof include metal, ceramics, and the like. Stainless steel is preferable for the metal. The cylindrical shape of the cover is preferably a cylindrical shape, but a rectangular cylindrical shape may also be used. The dimensions of the cover are not particularly limited, but a diameter such that the gap between the inner surface of the cover and the outer surface of the combustion container (side wall) is 5 to 20 mm is preferable. The cover preferably has a ring-shaped wall bent inward from the lower end of the cylindrical shape, but a simple cylindrical shape may also be used. The inner diameter of the ring-shaped wall is not particularly limited, but is preferably ±10 mm with respect to the outer diameter of the combustion container.

[0023] 3. Tray The material of the tray is not particularly limited, and examples thereof include metal, ceramics, and the like. Stainless steel is preferable for the metal. The dimensions of the tray may be larger than the outer diameter of the cover and are not particularly limited.

[0024] 4. Air adjustment mechanism The structure of the air adjustment mechanism is not particularly limited, but the screw-type mechanism is preferable.

[0025] 4. The rotation jig only needs to be detachably engaged with the combustion container and is not particularly limited. However, it preferably has a metal rod so that it can be operated from a distance from the combustion container, and more preferably has a handle made of wood or the like.

[0026] 5. Perforated lid The material of the perforated lid is not particularly limited, and examples thereof include metal, ceramics, and porcelain. Stainless steel is preferable for the metal. Since the perforated lid is exposed to high heat, it is preferably 3 mm or more in thickness, and it may be a single piece or a plurality of pieces stacked. The shape of the holes is not particularly limited, and examples thereof include round holes, square holes, and slit holes.

Example

[0027] Examples of the present invention will be described with reference to the drawings. Note that the structures, materials, numerical values, shapes, and dimensions described in the examples are illustrative and can be appropriately changed without departing from the gist of the invention.

[0028] [Example 1] The firewood grill 1 of Example 1 shown in FIGS. 1 to 9 includes a bottom wall 3 on which firewood or charcoal is placed and a cylindrical side wall 4, and a combustion container 2 having a plurality of air holes 7 and 8 in the bottom wall 3 and the side wall 4, a cylindrical cover 10 that covers the side wall 4 with a gap, a tray 14 that faces the lower end of the cover 10 from below, a tray stand 16 on which the tray 14 is placed, an annular port 13 that allows air to flow into the cover 10 from around the lower end of the cover 10, an air adjustment mechanism 20 that adjusts the inflow amount of the air by changing the height of the annular port 13, a rotation jig 25 that is detachably engaged with the combustion container 2 and manually rotates the combustion container 2, and a perforated lid 30 that covers the combustion container 2. The annular port 13 is between the lower end of the cover 10 and the tray.

[0029] The combustion container 2 is made of stainless steel and, as shown in Fig. 2 etc., consists of a bottom wall 3 with an outer diameter of 110 mm and a side wall 4 with a height of 45 mm. The upper part of the side wall 4 is an enlarged diameter part 5 whose diameter is enlarged to 135 mm. The enlarged diameter part 5 is not limited to the shape of a trumpet as shown in the illustrated example, and may be, for example, a flat flange shape. An engagement ring 6 is attached to a part of the enlarged diameter part 5. A through hole is formed at the center of the bottom wall 3. A plurality of air holes 7 are provided throughout almost the entire area of the bottom wall 3. As shown in Fig. 2(b), these air holes 7 are provided with those having a diameter of 4 mm and those having a diameter of 2 mm in a predetermined arrangement. A plurality of air holes 8 are also provided throughout almost the entire area of the side wall 4. As shown in Fig. 2(c), these air holes 8 are provided with those having a diameter of 2 mm and those having a diameter of 1 mm in a predetermined arrangement.

[0030] The cover 10 is made of stainless steel and, as shown in Fig. 3 etc., is cylindrical with an outer diameter of 130 mm and a height of 50 mm, and further includes a ring-shaped wall 11 bent inward from the lower end of the cylinder. The upper end of the cover 10 is in contact with the lower surface of the enlarged diameter part 5 of the combustion container 2. The inner diameter of the ring-shaped wall 11 is 110 mm.

[0031] The combustion container 2 and the cover 10 are integrated by four coupling bolts 12 as shown in Fig. 4 etc. Due to this integration, the gap between the inner surface of the cover 10 and the outer surface of the combustion container 2 (side wall 4) is about 10 mm, and the bottom wall 3 of the combustion container 2 is about 5 mm higher than the lower end of the cover 10. The upper end of the cover 10 and the lower surface of the enlarged diameter part 5 of the combustion container 2 are easily adhered to each other due to the above contact, so the gap below is closed and secured.

[0032] The tray 14 is made of stainless steel and, as shown in Fig. 5 etc., includes a flat disk part with a diameter of 130 mm or more. A thick metal plate 15 is fixed under the tray 14. A through hole is formed at the center of the tray 14, and a female screw hole communicating with the through hole is tapped at the center of the thick plate 15.

[0033] The tray stand 16 is made of stainless steel and, as shown in Fig. 1 etc., consists of three ring parts arranged concentrically on which the tray 14 is placed and three legs. Since the innermost ring part has a larger diameter than the thick plate 15, the thick plate 15 can pass through.

[0034] As shown in Fig. 6, Fig. 7 etc., the air conditioning mechanism 20 is a screw type mechanism that rotates the combustion container 2 and the cover 10 and changes the height of the annular port 13 by using a screw provided between the center of the bottom wall 3 and the center of the tray 14. Specifically, the adjustment bolt 21 is passed through the through hole of the bottom wall 3 from above, and the head is tightened and fixed to the bottom wall 3 with a nut 22, so that it rotates together with the bottom wall 3. The middle part of the adjustment bolt 21 is passed through the through hole of the tray 14 from above and screwed into the female screw hole of the thick plate 15. The lower part of the adjustment bolt 21 extends further downward after coming out of the female screw hole, and a retaining nut 23 is screwed on. The retaining nut 23 is a double nut so as not to screw.

[0035] As shown in Fig. 6, the rotation jig 25 includes a metal rod 26 and a handle 27 made of wood or the like. The rod 26 is 200 - 300 mm in length, the tip is bent so as to be easily engaged with the engagement ring 6, and the middle part is gently curved. Then, when holding the handle 27 of the rotation jig 25 and engaging the tip of the rod 26 with the engagement ring 6 and manually rotating the combustion container 2 and the cover 10 counterclockwise, as shown in Fig. 7(a), the adjustment bolt 21 also rotates and screws upward with respect to the female screw hole. Therefore, the combustion container 2 and the cover 10 rise, and the height of the annular port 13 (the gap between the lower end of the cover 10 and the tray 14) increases. The time when the retaining nut 23 hits the thick plate 15 is the upper limit of the rise, and the bolt is prevented from coming off. Also, when manually rotating the combustion container 2 and the cover 10 clockwise, as shown in Fig. 7(b), the adjustment bolt 21 also rotates and screws downward with respect to the female screw hole. Therefore, the combustion container 2 and the cover 10 descend, and the height of the annular port 13 decreases.

[0036] As shown in Fig. 8 and the like, the perforated lid 30 is formed by sandwiching a lid body 31 made of stainless steel with a thickness of 1.5 mm between upper and lower reinforcing plates 32 made of stainless steel with a thickness of 3 mm. A plurality of hot air passage holes 33 are provided through the perforated lid 30. A plurality of long holes 34 communicating with the hot air passage holes 33 are provided through the reinforcing plates 32, and the weight of the reinforcing plates 32 is appropriately reduced by the long holes 34. By sandwiching the lid body 31 with the reinforcing plates 32, deformation of the lid due to heat can be prevented, and the weight of the lid increases, improving the adhesion with the combustion container 2.

[0037] The charcoal grill configured as described above can be used, for example, as follows.

[0038] [1] Use by combustion adjustment As shown in Figs. 6 and 7, a small amount of charcoal or firewood is placed in the combustion container 2. To suppress the rise of the flame, the charcoal or firewood is placed horizontally on the bottom wall 3. Ignite this charcoal or firewood, and add an appropriate amount of charcoal or firewood to burn. At this time, air is supplied to the charcoal or firewood through the air holes 7 in the bottom wall 3 and the air holes 8 in the side wall 4 from the annular opening 13. A wire mesh 36 is set above the combustion container 2, a cooker 37 is placed on the wire mesh 36, and ingredients are placed in the cooker 37 for cooking.

[0039] As shown in Fig. 7(a), when the height of the annular opening 13 is large, the amount of air inflow increases, so the flame rises greatly and a large amount of smoke and soot are generated. Although cooking can be performed in this state, it is preferable to use it in a state close to the following strong fire.

[0040] As shown in Fig. 7(b), as described above, when the combustion container 2 and the cover 10 are rotated clockwise to extremely reduce the height of the annular opening 13, the amount of air inflow decreases, and a state close to strong fire, that is, a state where a small flame rises and the combustion is overall calm can be created, and almost no smoke and soot are generated. When cooking in this state, the adhesion of soot to the cooker 37 can be reduced, and the impact on the human body and the environment can be reduced.

[0041] Here, the following operational effects can be obtained. (A) By adjusting the height of the annular opening 13, there is no bias in the air flow across the entire circumference of the combustion container 2, so the air supply to the firewood or charcoal can be adjusted uniformly. (B) By adjusting the height of the annular opening 13, the air supply to the firewood or charcoal from the air holes 7 and 8 in both the bottom wall 3 and the side wall 4 can be adjusted simultaneously. (C) It is also possible to make adjustments so that almost no smoke and soot are generated, reducing the adhesion of soot to the cooker 37 and the impact on the human body and the environment. (D) Since the air adjustment mechanism 20 is a screw-type mechanism, the air supply to the firewood or charcoal can be adjusted from any direction of the firewood grill. (E) Since the air adjustment mechanism 20 is a screw-type mechanism, the height of the annular opening 13 can be adjusted steplessly, so the air inflow rate can be adjusted finely and steplessly, and can also be reduced to the limit.

[0042] [2] Use in a smoked state As shown in FIGS. 8 and 9, when the perforated lid 30 is placed on the combustion container 2 with the firewood burning, the combustion is restricted (although the size of the flame becomes smaller, the fire inside does not completely go out), so incomplete combustion can be forcibly generated, and smoke is generated from the firewood by pyrolysis, and the food ingredients (meat, eggs, cheese, pastes, etc.) on the wire mesh 36 can be smoked.

[0043] Here, the following effects can be obtained. (a) Even when the perforated lid 30 is placed, the fire inside is maintained without completely going out. The fire inside can be seen from the perforated lid 30. (b) Any type of firewood can be smoked, so there is no need to use smokewood or smoke chips (although they can be used). (c) By simply putting on or not putting on the perforated lid 30, the smoked state and the state of [1] can be quickly switched.

[0044] Also, this firewood grill can also be used as a bonfire stand or the like.

[0045] [Example 2] The firewood grill 1 of Example 2 shown in Fig. 10 is different from Example 1 only in that the lower end of the cover 10 is fixed to the tray 14, and there is an annular opening 13 for allowing air to flow into the cover 10 from around the upper end of the cover 10. Other than that, it is common with Example 1.

[0046] When the combustion container 2 and the cover 10 are manually rotated counterclockwise, as shown in Fig. 10(a), the adjustment bolt 21 also rotates and screws upward with respect to the female screw hole. Therefore, the combustion container 2 and the cover 10 rise, and the height of the annular opening 13 (the gap between the upper end of the cover 10 and the enlarged diameter portion 5) increases. Also, when the combustion container 2 and the cover 10 are manually rotated clockwise, as shown in Fig. 10(b), the adjustment bolt 21 also rotates and screws downward with respect to the female screw hole. Therefore, the combustion container 2 and the cover 10 descend, and the height of the annular opening 13 decreases. Therefore, the firewood grill 1 of Example 2 can also be used in the same manner as Example 1, and the same operational effects as Example 1 can be obtained.

[0047] Note that the present invention is not limited to the above-described examples, and can be appropriately modified and embodied without departing from the gist of the invention.

Explanation of Reference Numerals

[0048] 1 Firewood grill 2 Combustion container 3 Bottom wall 4 Side wall 5 Enlarged diameter portion 6 Engagement ring 7 Air hole 8 Air hole 10 Cover 11 Ring-shaped wall 12 Coupling bolt 13 Annular opening 14 Tray 15 Thick plate 16 Tray stand 20 Air adjustment mechanism 21 Adjustment bolt 22 Nut 23 Lock nut 25 Rotating jig 26 Rod 27 Handle 30 Perforated lid 31 Lid body 32 Reinforcing plate 33 Hot air passage hole 34 Slot 36 Wire mesh 37 Cooker

Claims

1. A combustion container including a bottom wall on which firewood or charcoal is placed and a cylindrical side wall, the bottom wall and the side wall having air holes; A cylindrical cover covering the side wall with a gap therebetween; An annular opening for allowing air to flow into the cover from around the lower end or the upper end of the cover; An air adjustment mechanism for adjusting the amount of air flowing in by changing the height of the annular opening A firewood grill comprising the same.

2. The firewood grill according to claim 1, wherein the annular opening is between the lower end of the cover and a tray facing the lower end from below.

3. The firewood grill according to claim 1, wherein the annular opening is between the upper end of the cover and an enlarged diameter portion at the upper part of the side wall.

4. The firewood grill according to claim 1, wherein the cover includes a ring-shaped wall bent inward from the lower end.

5. The firewood grill according to any one of claims 1 to 4, wherein the air adjustment mechanism is a screw-type mechanism that rotates a screw together with the combustion container to change the height of the annular opening.

6. The firewood grill according to claim 6, further comprising a manual rotation jig detachably engaged with the combustion container.

7. The firewood grill according to any one of claims 1 to 4, further comprising a perforated lid covering the combustion container.

8. A combustion container including a bottom wall on which firewood or charcoal is placed and a cylindrical side wall, the bottom wall and the side wall having air holes; A cylindrical cover covering the side wall with a gap therebetween; An annular opening for allowing air to flow into the cover from around the lower end or the upper end of the cover; An air adjustment mechanism for adjusting the amount of air flowing in by changing the height of the annular opening Using a firewood grill comprising the same, A method of using a charcoal grill that adjusts the air supply amount into the combustion container from the air holes in both the bottom wall and the side wall simultaneously by changing the height of the annular opening and adjusting the air inflow amount by means of an air conditioning mechanism. **Claim 9** The method of using a charcoal grill according to claim 8, wherein a strong fire is created by adjusting the air supply amount. **Claim 10** The method of using a charcoal grill according to claim 8, wherein smoke is generated from the charcoal by covering the combustion container with a perforated lid.

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