Solid fuel combustor

Abstract

This fire pit provides a place to put cooking utensils that are hot after cooking, and also has the function of keeping the hot water and food in the cooking utensils at an optimal temperature. [Solution] The combustor body 1 has a fuel mounting section 2 on which solid fuel is placed and a combustion chamber 3 on which the solid fuel is burned. The combustor body 1 is equipped with a side table 6 which is attached to the side plate 1D and installed adjacent to the outside of the combustor body 1 from the upper end of the side plate 1D. The side table 6 is equipped with a heat recovery section which recovers heat from the combustion chamber 3 and a heat transfer section which transfers the heat from the heat recovery section to the table surface 6A, and has a heat transfer structure which maintains the table surface 6A of the side table 6 at a predetermined temperature.

Description

Technical Field

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[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 campfire stand used at camps and the like. In the campfire stand described in Patent Document 1, a fire grate is provided on a dish-shaped ash receiver having legs, and a front panel, a back 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. A trivet can be provided on the upper part of the frame body. It is possible to place cooking utensils such as a pot on the trivet to boil water or cook (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When using a cooking utensil on a campfire stand, since the cooking utensil is at a high temperature after cooking, it may be difficult to find a place to place the cooking utensil. In addition, since it cannot be kept warm after removing the cooking utensil from the campfire stand, the water that has been boiled with difficulty or the cooked food will cool down. When boiling water again or warming the food, the cooking utensil is placed on the trivet and heated, but the time to wait for the water or food to warm up becomes long. On the other hand, if the cooking utensil is left on the trivet, the water will boil or the food will burn, so it is not user-friendly.

[0005] An object of the present invention is to provide a campfire stand that has a function of ensuring a place to place a cooking utensil that is at a high temperature after cooking and keeping it warm at an optimal temperature without boiling the water or food in the cooking utensil. [Means for solving the problem]

[0006] The present invention solves the above problems and is a solid fuel combustor having a base plate 1A, a front plate 1B, a back plate 1C, and a side plate 1D rising from the edge of the base plate 1A and having an open top, a fuel mounting section 2 provided inside the combustor body 1 on which solid fuel is placed, and a combustion chamber 3 formed in the space above the fuel mounting section 2 on which the solid fuel is burned, and further comprising a side table 6 attached to the side plate 1D of the combustor body 1 and installed adjacent to the outside of the combustor body 1 from the upper end of the side plate 1D, a heat transfer structure provided between the side table 6 and the combustor body 1, and a heat transfer structure provided to maintain the table surface 6A of the side table 6 at a predetermined temperature by heat transfer from the combustion chamber 3.

[0007] Furthermore, the heat transfer structure includes a heat recovery unit located within the combustion chamber 3 and a heat transfer unit that transfers the heat from the heat recovery unit to the table surface 6A, thereby maintaining the table surface 6A at a predetermined temperature through the transfer of heat from the heat recovery unit to the heat transfer unit.

[0008] Furthermore, the side table 6 has a pair of side portions 6B formed at both ends of the table surface 6A, and a slit 6b formed at the lower end of the side portions 6B. The slit 6b fits into the side plate 1D of the combustor body 1, thereby attaching the side table 6 to the combustor body 1. The side portion 61 located inside the combustor body 1 constitutes the heat recovery section, and the side portion 6B located outside the combustor body 1 constitutes the heat transfer section. The heat from the combustion chamber 3 is recovered by the side portions 6B and transferred to the table surface 6A, thereby maintaining a predetermined temperature. [Effects of the Invention]

[0009] According to the configuration of the present invention, after cooking or performing other tasks by placing a cooking utensil 8 on the trivet 7 of the combustion chamber body 1, the cooking utensil 8 can be placed on the side table 6 installed on the outside of the combustion chamber body 1, thus providing a place to put the hot cooking utensil 8. Furthermore, by having a heat transfer structure between the side table 6 and the combustion chamber body 1, and maintaining the table surface 6A of the side table 6 at a predetermined temperature, it is possible to provide a solid fuel combustion chamber that can keep the cooking utensil 8 placed on the side table 6 at an optimal temperature. [Brief explanation of the drawing]

[0010] [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 side table according to an embodiment of the present invention. [Figure 3] This is a cross-sectional view of the main part 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. [Figure 5] This is a front view of a solid fuel combustor according to an embodiment of the present invention. [Modes for carrying out the invention]

[0011] 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 the solid fuel combustor according to an embodiment of the present invention, Figure 2 is a perspective view of the side table according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the main part of the solid fuel combustor according to an embodiment of the present invention, and Figure 4 is a cross-sectional view of the line VV shown in Figure 3. Figure 5 is a front view of the solid fuel combustor according to an embodiment of the present invention, showing a trivet placed in the upper opening and cooking utensils placed on the side table.

[0012] The solid fuel combustor according to an embodiment of the present invention comprises a combustor body 1, a fuel mounting section 2, a combustion chamber 3, and a side table 6. The combustor body 1 is a box-shaped body having a bottom plate 1A, a front plate 1B, a back plate 1C, and side plates 1D rising from the bottom plate 1A, and an open top.

[0013] As shown in Figures 3 and 4, the fuel storage section 2 is composed of flat plates spaced apart on the bottom plate 1A within the combustor body 1. The combustion chamber 3 is a space enclosed by the front plate 1B, back plate 1C, and side plate 1D within the combustor body 1, above the fuel storage section 2.

[0014] Below the fuel storage section 2 is an air chamber 4, which is a space enclosed by the bottom plate 1A of the combustor body 1 and the front plate 1B, back plate 1C, and side plate 1D. 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 slot and is located lower than the fuel storage section 2.

[0015] The fuel storage section 2 is equipped with an air supply port 20 that connects the air chamber 4 and the combustion chamber 3. The air supply port 20 is composed of a plurality of through-holes located in the fuel storage section 2.

[0016] 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.

[0017] The combustor body 1 is equipped with a combustion chamber 3 and an adjacent secondary air chamber 5. As shown in Figure 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, which is continuous with the lower end of the outer wall portion 5A, is provided with secondary air holes 5b that connect the outside air to the secondary air chamber 5. As shown in Figure 5, the secondary air holes 5b are composed of a plurality of elongated holes located in the peripheral wall portion 5B.

[0018] The front plate 1B and the back plate 1C are provided with a secondary air supply port 30 that communicates the combustion chamber 3 and the secondary air chamber 5. As shown in FIGS. 1 and 3, the secondary air supply port 30 is composed of a plurality of through holes arranged along the longitudinal direction of the front plate 1B and the back plate 1C at the upper part of the combustion chamber 3.

[0019] When using the solid fuel combustor, firewood as fuel is introduced from the upper opening 11 of the combustor body 1 and set on the fuel placement part 2, and the firewood is ignited 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 combustor body 1 passes through the air holes 1d of the side plate 1D and flows into the air chamber 4, and air is continuously supplied to the combustion chamber 3 during combustion.

[0020] 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 until it reaches the upper opening 11 of the combustor body 1. Then, 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, warming the air in the secondary air chamber 5 and generating an upward airflow. 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 combustor body 1 passes through the secondary air holes 5b and flows into the lower part of the secondary air chamber 5. The air that flows into the lower part of the secondary air chamber 5 flows upward by the upward airflow.

[0021] 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 performing secondary combustion at 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 combustor body 1.

[0022] It is best to initially place a small amount of firewood (for example, 2-3 pieces) into the fuel storage section 2, and then add more firewood after the flames have spread throughout the initial pile. This makes it easier to ignite the firewood and reduces the generation of smoke and soot. Also, when adding more firewood, ensure that the firewood piled on top does not exceed the secondary air supply port 30 to ensure that the secondary combustion effect is achieved.

[0023] The combustion unit body 1 has a removable trivet 7 on top of the upper opening 11. The trivet 7 is rectangular or square in shape, and its length in the front-to-back direction is made longer than the width of the side plate 1D so that the trivet 7 can be placed on the front plate 1B and the back plate 1C. When using cooking utensils 8 such as kettles or pots, as shown in Figure 5(a), the trivet 7 is placed on top of the upper opening 11 of the combustion unit body 1, and the cooking utensils 8 are placed on top of the trivet 7 to boil water or cook.

[0024] Furthermore, the solid fuel combustor of this embodiment is equipped with a side table 6 that can be detachably attached to the side plate 1D of the combustor body 1. The side table 6 has a table surface 6A and a pair of side portions 6B formed on both sides of the table surface 6A.

[0025] The table surface 6A of the side table 6 is provided with a plurality of elongated holes 6a arranged at predetermined intervals. The distance between the pair of side sections 6B, 6B is configured to be shorter than the width dimension of the side plate 1D of the combustor body 1. The side section 6B is provided with a slit 6b that opens downward and locking pieces 61, 62 provided before and after the slit 6b. The lower part of the side section 6B is inclined diagonally upward from the locking pieces 62 toward the edge of the table surface 6A.

[0026] As shown in Figures 1 and 3, the side table 6 has a slit 6b that fits into the upper end of the side plate 1D of the combustor body 1, with a locking piece 61 located inside the combustion chamber 3 of the combustor body 1 and a locking piece 62 located outside the combustor body 1. By the contact of the locking pieces 61 and 62 with the side plate 1D, the table surface 6A of the side table 6 is held horizontally and is located to the side of the combustor body 1 at approximately the same height as the upper opening 11. The side table 6 can be attached to the combustor body 1 without the use of fixing means such as screws and can be easily attached and detached.

[0027] The side table 6 of this embodiment is equipped with a heat transfer structure that recovers heat from the combustion chamber 3 and maintains the table surface 6A at a predetermined temperature. Of the side portion 6B of the side table 6, the locking piece 61 located inside the combustion chamber 3 and the locking piece 62 in contact with the side plate 1D constitute the heat recovery section, while the side portion 6B located outside the combustor body 1 constitutes the heat transfer section.

[0028] Specifically, the locking piece 61 is directly heated by the flame in the combustion chamber 3, causing it to heat up to a high temperature. The side plate 1D also becomes hot due to the combustion heat, and this heat is transferred to the locking piece 62, which is in contact with the side plate 1D, causing the locking piece 62 to also become hot. The heat from the locking pieces 61 and 62 is directly transferred to the table surface 6A, and the temperature near the inner end of the table surface 6A on the side connected to the combustor body 1 reaches approximately 200°C. The heat from the locking pieces 61 and 62 is also transferred to the center and outer ends of the table surface 6A via the heat transfer part, the side portion 6B, resulting in a temperature of approximately 150°C near the center of the table surface 6A and approximately 100°C near the outer ends. While the fuel is burning in the combustion chamber 3, the table surface 6A of the side table 6 is maintained at the above temperatures.

[0029] An example of using a cooking utensil 8 to boil water is explained in Figure 5. When boiling water with the cooking utensil 8, the trivet 7 is placed on the upper opening 11 of the combustion chamber body 1, as shown in Figure 5(a), and the cooking utensil 8 filled with water is placed on the trivet 7. In this way, the water in the cooking utensil 8 is heated by the flame in the combustion chamber 3, and the water can be boiled. Once the water boils, the cooking utensil 8 is removed from the trivet 7 and placed on the side table 6, as shown in Figure 5(b). The cooking utensil 8 placed on the side table 6 is not directly heated by the flame in the combustion chamber 3, which prevents the water from over-boiling.

[0030] The table surface 6A of the side table 6 is maintained at approximately 100-200°C, and the cooking utensils 8 placed on the side table 6 are kept warm by the heat of the table surface 6A. Therefore, if there is hot water remaining in the cooking utensils 8 after using the hot water, placing the cooking utensils 8 on the side table 6 will keep the water in the cooking utensils 8 warm at 70-80°C, preventing the water from cooling down or boiling.

[0031] If you want to boil water in the cooking utensil 8 again, you move the cooking utensil 8 from the side table 6 to the trivet 7 and heat it with the flame from the combustion chamber 3. At this time, the water in the cooking utensil 8 is kept warm at 70-80°C, so the time it takes to boil the water is shortened, making the water immediately usable, and resulting in a user-friendly solid fuel combustor. [Explanation of Symbols]

[0032] 1. Combustion unit 1A bottom plate 1B Front Panel 1C back plate 1D side plate 2. Fuel storage section 3 Combustion chamber 6 Side Tables 6A Table surface 6B Side part 6b Slit

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, A solid fuel combustor having a fuel mounting section provided within the combustor body 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, The combustion chamber body is equipped with a side table that is attached to the side plate and positioned adjacent to the outside of the combustion chamber body from the upper end of the side plate, A solid fuel combustor is characterized by having a heat transfer structure between the side table and the combustor body, which maintains the table surface of the side table at a predetermined temperature through heat transfer from the combustion chamber.

2. The solid fuel combustor according to claim 1, characterized in that the heat transfer structure comprises a heat recovery unit located in the combustion chamber and a heat transfer unit that transfers the heat from the heat recovery unit to the table surface.

3. The side table has a pair of side portions formed at both ends of the table surface and a slit formed at the lower end of the side portions, and the side table is attached to the combustor body by the slit fitting into the side plate of the combustor body. The solid fuel combustor according to claim 2, characterized in that the heat recovery section is formed by the side portion located inside the combustor body, and the heat transfer section is formed by the side portion located outside the combustor body.

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