Solid fuel combustor

Abstract

We propose a solid fuel burner that allows for stable placement of cooking utensils without the need for a trivet, and is easy to handle with simple firewood loading. [Solution] The combustion chamber 1 has a fuel mounting section 2 on which solid fuel is placed and a combustion chamber 3 on which the solid fuel burns. The cooking griddle 6, which is placed on the upper opening 11 of the combustion chamber 1, has legs 60, and by resting the legs 60 on the upper ends of the front plate 1B and back plate 1C of the combustion chamber 1, a predetermined gap 8 is formed between the cooking griddle 6 and the upper opening 11 of the combustion chamber 1.

Description

Technical Field

[0001] The present invention relates to a solid fuel combustion device that burns solid fuels such as firewood and charcoal.

Background Art

[0002] There is a solid fuel burner called a fire pit used in camping and the like. In the fire pit described in Patent Document 1, a fire grate is provided on a dish-shaped ash receiver having legs, and a front panel, a rear panel, and side panels are arranged so as to surround the upper peripheral edge of the ash receiver and the fire grate to form a frame body, and a trivet can be provided on the upper part of the frame body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the fire pit of Patent Document 1, cooking utensils such as an iron plate are placed on the trivet for cooking, but the combustion opening is blocked by the cooking utensils, which may prevent the flow of combustion gas and deteriorate combustion. In addition, the cooking utensils placed on the trivet may slide and move, and it is necessary to pay attention to the fall of the cooking utensils and the like during cooking.

[0005] Also, when replenishing the fuel, which is firewood, it is necessary to lift the cooking utensils or remove the cooking utensils from the trivet. However, if the replenishment work of firewood is performed while holding the cooking utensils, there is a risk of burns and the like, and there is a problem with the placement location of the high-temperature cooking utensils. There are also those in which a door is provided on the front panel so that firewood can be inserted as in Patent Document 1, but in this case, the cost becomes high.

[0006] The objective of this invention is to propose a solid fuel combustor that allows cooking utensils to be stably placed without a trivet, and that is easy to handle with firewood loading. [Means for solving the problem]

[0007] The present invention solves the above problems and is a solid fuel combustor comprising a combustor body 1 having an open top, composed of a bottom plate 1A and a front plate 1B, a back plate 1C, and a side plate 1D rising from the edge of the bottom plate 1A; a fuel mounting section 2 provided inside the combustor body 1 on which solid fuel is placed; a combustion chamber 3 formed in the space above the fuel mounting section 2 on which the solid fuel is burned; and a cooking griddle 6 installed on the top opening 11 of the combustor body 1, wherein the cooking griddle 6 has legs 60 and is placed on the upper ends of the front plate 1B and the back plate 1C of the combustor body 1 by the legs 60, and a predetermined gap 8 is formed between the cooking griddle 6 and the top opening 11 of the combustor body 1.

[0008] The lower end of the leg 60 has a mounting portion 60A that rests on the upper ends of the front plate 1B and the back plate 1C, and a contact portion 60B that abuts against the inner surfaces of the front plate 1B and the back plate 1C, thereby preventing the cooking griddle 6 from falling off the combustion unit body 1.

[0009] The cooking griddle 6 is formed to have a width shorter than the width of the front plate 1B and the back plate 1C, and the cooking griddle 6 is slidably installed on the upper ends of the front plate 1B and the back plate 1C. During cooking, the position of the cooking griddle 6 can be adjusted according to the combustion state, and by moving the cooking griddle 6 to one side of the combustion unit body 1, it is possible to replenish the firewood fuel even with the cooking griddle 6 in place. [Effects of the Invention]

[0010] According to the configuration of the present invention, even when a cooking plate 6 is placed on the combustion chamber body 1, flames escape through the gap 8 and are released to the outside, maintaining a stable combustion state. Furthermore, the cooking plate 6 does not easily fall out of the upper opening of the combustion chamber body 1 during cooking, allowing for safe cooking. In addition, firewood, which is the fuel, can be replenished even with the cooking plate 6 placed in the upper opening 11 of the combustion chamber body 1, providing a safe and easy-to-handle solid fuel combustion chamber. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of a solid fuel combustor according to an embodiment of the present invention. [Figure 2] This is a perspective view of a cooking griddle according to an embodiment of the present invention. [Figure 3] This is a plan view of a solid fuel combustor according to an embodiment of the present invention. [Figure 4] Figure 3 is a cross-sectional view along the VV line. [Modes for carrying out the invention]

[0012] Hereinafter, embodiments of the solid fuel combustor of the present invention will be described with reference to the drawings. Figure 1 is a perspective view of a solid fuel combustor with a cooking griddle according to an embodiment of the present invention, Figure 2 is a perspective view of a cooking griddle according to an embodiment of the present invention, Figure 3 is a plan view of a solid fuel combustor with a cooking griddle according to an embodiment of the present invention, and Figure 4 is a cross-sectional view taken along the VV line shown in Figure 3.

[0013] The solid fuel combustor of this embodiment is a fire pit that uses firewood as fuel, and comprises a combustor body 1, a fuel placement section 2, and a combustion chamber 3. The combustor body 1 is a box-shaped body with a bottom plate 1A, a front plate 1B, a back plate 1C, and side plates 1D that rise from the edge of the bottom plate 1A, and the top is open.

[0014] As shown in Figures 3 and 4, the fuel storage section 2 is composed of flat plates spaced apart on the bottom plate 1A inside the combustor body 1. The combustion chamber 3 is a space located above the fuel storage section 2 and enclosed by the front plate 1B, back plate 1C, and side plate 1D inside the combustor body 1.

[0015] Below the fuel storage section 2 is an air chamber 4, which is a space enclosed by the bottom plate 1A, front plate 1B, back plate 1C, and side plate 1D of the combustor body 1. The side plate 1D of the combustor body 1 is provided with an air hole 1d that connects the outside air to the air chamber 4. As shown in Figure 4, the air hole 1d is a horizontally elongated hole located lower than the fuel storage section 2.

[0016] The fuel storage section 2 is equipped with an air supply port 20 that connects the air chamber 4 and the combustion chamber 3. As shown in Figure 3, the air supply port 20 is composed of a plurality of through-holes located in the fuel storage section 2.

[0017] The combustion chamber body 1 is equipped with legs 10 on the underside of its base plate 1A. The combustion chamber body 1 is placed on the ground by the legs 10, so that the base plate 1A does not directly touch the ground. The legs 10 can be folded and stored under the base plate 1A of the combustion chamber body 1, making it compact for transport and storage.

[0018] Furthermore, the combustor body 1 is equipped with a secondary air chamber 5 adjacent to the combustion chamber 3. As shown in Figures 3 and 4, the secondary air chamber 5 is a space enclosed by an outer wall portion 5A located outside the front plate 1B and back plate 1C, and a peripheral wall portion 5B that connects the front plate 1B and back plate 1C to the outer wall portion 5A. The peripheral wall portion 5B below the outer wall portion 5A is equipped with secondary air holes 5b that connect the outside air to the secondary air chamber 5. The secondary air holes 5b are composed of a plurality of elongated holes located in the peripheral wall portion 4B.

[0019] The front plate 1B and the back plate 1C are provided with a secondary air supply port 30 that connects the combustion chamber 3 and the secondary air chamber 5. The secondary air supply port 30 consists of a plurality of through-holes arranged along the longitudinal direction of the front plate 1B and the back plate 1C at the top of the combustion chamber 3.

[0020] When using a solid fuel burner, firewood as fuel is fed into the upper opening 11 of the burner body 1 and set on the fuel placement part 2, and ignition of the firewood is carried out using an ignition device such as an ignition lighter or a match. When the firewood is ignited and combustion starts, an upward airflow is generated near the fuel placement part 2, and the air in the air chamber 4 passes through the air supply port 20 and flows into the combustion chamber 3, being supplied around the firewood. When the air in the air chamber 4 flows into the combustion chamber 3, the air around the burner body 1 passes through the air holes 1d in the side plate 1D and flows into the air chamber 4. During combustion, air is continuously supplied to the combustion chamber 3.

[0021] Combustion is promoted by the air supplied from the fuel supply port 20, and the flame spreads over the entire firewood set on the fuel placement part 2 and grows larger. When the flame reaches the upper opening 11 of the burner body 1, the temperature of the combustion chamber 3 rises, and the temperature of the front plate 1B and the back plate 1C rises due to the radiant heat of the flame, and the air in the secondary air chamber 5 is heated and an upward airflow is generated. The air in the upper part of the secondary air chamber 5 passes through the secondary air supply port 30 and flows into the combustion chamber 3, and the air around the burner body 1 passes through the secondary air holes 5b and flows into the lower part of the secondary air chamber 5. The air flowing into the lower part of the secondary air chamber 5 moves upward by the upward airflow.

[0022] The air flowing into the upper part of the combustion chamber 3 from the secondary air supply port 30 is supplied above the firewood set in the combustion chamber 3, and burns the unburned gas that could not be burned by the air supplied from the fuel supply port 20. By carrying out secondary combustion in the upper part of the combustion chamber 3, it approaches complete combustion, and a stable flame with less smoke and soot is formed at the upper opening 11 of the burner body 1.

[0023] The amount of firewood initially put into the fuel placement part 2 should be small (for example, 2 to 3 pieces), and additional firewood is added after the flame has spread over the entire initially set firewood. By doing so, it is easy to ignite the firewood and the generation of smoke and soot can be suppressed. Also, when adding firewood additionally, by ensuring that the firewood stacked on the top does not exceed the secondary air supply port 30, the effect of secondary combustion can be surely obtained.

[0024] As shown in Figure 1, the solid fuel combustor of this embodiment is equipped with a cooking griddle 6 that can be placed on the upper opening 11 of the combustor body 1, and cooking can be performed using the flame of the solid fuel combustor. The cooking griddle 6 of this embodiment is rectangular, and as shown in Figures 1 and 4, the length of the short side is the same as the width of the side plate 1D of the combustor body 1, and the length of the long side is approximately half the width of the front plate 1B and back plate 1C of the combustor body 1. The outer edge of the cooking griddle 6 has an upward-rising peripheral edge 61 to prevent food, oil, etc. from spilling during cooking.

[0025] The cooking griddle 6 has four legs 60 at the four corners of its underside, and the cooking griddle 6 is rested on the upper ends of the front plate 1B and back plate 1C of the combustion unit body 1 by the legs 60. The legs 60 are made of folded pieces formed by bending the side ends of the cooking griddle 6 downwards. At the lower end of the legs 60, the shorter outer portion forms a mounting portion 60A with a predetermined width, and the longer inner portion of the mounting portion 60A forms a contact portion 60B.

[0026] When the cooking griddle 6 is placed on the upper opening 11 of the combustion chamber body 1, as shown in Figure 4, the mounting portion 60A of the legs 60 rests on the upper ends of the front plate 1B and back plate 1C, and the contact portion 60B is located inside the combustion chamber 3 from the upper opening 11 and faces the inner surfaces of the front plate 1B and back plate 1C. If the cooking griddle 6 moves in either the direction of the front plate 1B or the back plate 1C, one of the contact portions 60B will come into contact with the inner surface of the front plate 1B or back plate 1C, stopping the movement of the cooking griddle 6. The mounting portion 60A has a predetermined width and is designed so that it does not come off the front plate 1B or back plate 1C, and the cooking griddle 6 does not fall off the combustion chamber body 1.

[0027] The cooking griddle 6 can be moved within the width of the front plate 1B and back plate 1C, and its installation position can be freely changed. It can be installed near the center of the combustion unit body 1 as shown in Figure 1, or it can be installed closer to the side plate 1D as shown in Figure 3. When moving the cooking griddle 6, the contact portion 60B acts as a guide, allowing the mounting portion 60A to slide and move on the front plate 1B and back plate 1C.

[0028] In this implementation, the legs 60 are configured to create a gap 8 between the cooking griddle 6 and the upper opening 11 of the combustion unit body 1, so that even when the cooking griddle 6 is used, the upper opening 11 is not completely blocked by the cooking griddle 6.

[0029] When a cooking griddle 6 is placed on top of a burning solid fuel combustor, the flames from the combustion chamber 3 strike the bottom surface of the cooking griddle 6, heating it to a high temperature, and allowing food to be cooked on the griddle 6. The flames and combustion gases that strike the bottom surface of the cooking griddle 6 change direction outward and are released to the outside through the gap 8. In this case, regardless of the direction the flames and combustion gases are directed after striking the bottom surface of the cooking griddle 6, they can pass through the gap 8 and be released to the outside smoothly. Therefore, even when using the cooking griddle 6, the flow of flames and combustion gases coming out of the combustion opening 11 is not obstructed, the combustion state is not worsened, and the generation of smoke and soot can be suppressed.

[0030] Furthermore, when placing the cooking griddle 6 on or off the upper opening 11, a handle (not shown) may be used. However, because there is a gap 8 between the cooking griddle 6 and the upper opening 11, the tip of the handle does not come into contact with the upper opening 11, and the tip of the handle can easily grasp the peripheral edge 61 of the cooking griddle 6.

[0031] Furthermore, when the cooking griddle 6 is removed from the combustion unit body 1 and placed on a table or the ground, it is supported by the lower end of the contact portion 60B of the legs 60. A lot of soot adheres to the bottom surface of the cooking griddle 6, but since the bottom surface of the cooking griddle 6 does not come into direct contact with the table or the ground, the soot adhering to the cooking griddle 6 does not stain the table or the ground.

[0032] Furthermore, if firewood needs to be replenished while the cooking griddle 6 is in use, as shown in Figure 4, by moving the cooking griddle 6 to one side plate 1D, one half of the upper opening 11 is opened, and firewood can be added through the open upper opening 11 even with the cooking griddle 6 still in place. Since there is no need to remove the cooking griddle 6 from the combustion unit body 1, there is no need to worry about spilling food on the cooking griddle 6 when replenishing firewood during cooking, and the problem of not knowing where to put the hot cooking griddle 6 is eliminated. [Explanation of symbols]

[0033] 1. Combustion unit 1A bottom plate 1B Front Panel 1C back plate 1D side plate 2. Fuel storage section 3 Combustion chamber 6. Cooking griddle 8 Gap 11 Upper opening 60 legs 60A Mounting section 60B Contact part

Claims

1. A combustion chamber body consisting of a base plate and a front plate, back plate, and side plate rising from the edge of the base plate, with an opening at the top, The combustor body includes a fuel mounting section on which solid fuel is placed, and a combustion chamber formed in the space above the fuel mounting section on which the solid fuel is burned. A solid fuel combustor having a cooking griddle installed on the upper opening of the combustor body, The solid fuel combustor is characterized in that the cooking griddle has legs, which are placed on the upper ends of the front plate and back plate of the combustor body, and a predetermined gap is formed between the cooking griddle and the upper opening of the combustor body.

2. The solid fuel combustor according to claim 1, characterized in that the lower end of the leg has a mounting portion that rests on the upper ends of the front plate and the back plate, and a contact portion that abuts against the inner surfaces of the front plate and the back plate.

3. The solid fuel combustor according to claim 1 or 2, characterized in that the cooking griddle is formed to have a width shorter than the width of the front plate and the back plate, and the cooking griddle is slidably installed on the upper ends of the front plate and the back plate.

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