JP7397374B2 - furnace equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a furnace device that can heat cooking such as rice during disasters, camping, etc.

2. Description of the Related Art A stove device is known as a cooking tool that can heat cooking during disasters, camping, etc. (see, for example, Patent Document 1). Furnace devices generally use firewood or charcoal as fuel.

In the event of a disaster, local governments and other organizations stockpile a certain amount of food such as emergency rations as a disaster prevention measure. However, the amount of stockpiled food is limited due to restrictions on storage space, costs, etc., and preparations to secure food are recommended even at a self-help level. For example, ordinary households often stockpile food such as rice, which can be useful as self-help food in the event of a disaster.

Publication No. 2-9281

However, rice is a food ingredient that requires cooking. Therefore, when it is difficult to obtain high-quality firewood, charcoal, etc. that can be used as fuel in the event of a disaster, the issue becomes how to carry out cooking.

On the other hand, firewood, charcoal, and the like can be easily ignited to a certain extent if there is a igniter, but skill in starting a fire is required to ignite the fire without an igniter. Additionally, it takes time for firewood and charcoal to become stable heating sources.

Even in times other than disaster situations, such as when camping, there may be situations where food is available but there is a shortage of high-quality firewood or charcoal for fuel, and it is also assumed that people may have difficulty starting a fire due to inexperienced fire-starting skills. be done.

SUMMARY OF THE INVENTION An object of the present invention is to provide a furnace device that can easily heat and cook food with high efficiency even in situations where fuel is limited.

The furnace device according to the present invention includes:
A furnace device in which a combustion port that also serves as an intake port is opened through the front side of a bottomed cylindrical furnace body that serves as a combustion chamber for burning fuel, and a furnace can be placed above the combustion chamber,
The furnace body is
In the upper part of the combustion chamber, the pot bottom of the pot has an upper edge that can enter into the furnace main body,
The upper edge portion has an exhaust port upper edge where the rear side of the furnace main body has a wider gap with the circumferential surface of the pot, and an exhaust port is formed between the upper edge of the exhaust port and the circumferential surface of the pot;
Directly below the exhaust port, an exhaust passage communicating with the exhaust port is formed by a peripheral wall of the furnace main body and a peripheral wall of the pot.

The upper edge of the furnace main body and the pot are circular in plan view, the diameter of the pot is smaller than that of the upper edge, and the pot can be arranged eccentrically toward the front.

The upper edge of the exhaust port may include a branch wall that extends toward the pot and divides the exhaust port into left and right parts.

The furnace main body may have a configuration in which an upper edge on the rear side bulges outward.

The upper edge has an elliptical shape in plan view,
The combustion chamber can be arranged eccentrically toward the front.

Two or more fire openings may be provided side by side on the front surface of the furnace main body.

In the furnace main body, it is preferable that the inner surface of the combustion chamber has a necking portion whose diameter is reduced toward the upper edge.

The pot bottom of the pot can be arranged such that 1/3 to 2/3 of the total height of the pot penetrates into the furnace main body.

It is desirable that the pot main body includes a support for holding the pot at a position higher than the upper edge.

It is desirable that the fire opening is opened below the bottom of the pot in which it is placed.

The furnace main body may be provided with a rostrum that floats the fuel from the bottom surface.

It is desirable that the rostle has a restraining wall that prevents the fuel introduced from the fire port from moving to the rear side.

Moreover, the stove cooking utensil of the present invention is
The above-mentioned pot is arranged in the above-mentioned furnace device.

According to the furnace device of the present invention, the heat generated in the combustion chamber heats the bottom of the pot and is stored above the stove, thereby heating the stove side of the stove. In addition, the exhaust heat that passes through the bottom of the pot, passes through the exhaust passage, and heads toward the exhaust port also heats the exhaust port side of the pot. This makes it difficult for the heat inside the furnace to escape, allowing it to be transferred to the pot with high efficiency.Also, by exhausting the air from the exhaust port, the air flow necessary for burning the fuel from the stove can be secured, so the fuel can be extinguished. It is possible to burn stably without burning.

Therefore, even with relatively easily available and poor fuels such as newspapers and waste paper, rice can be cooked deliciously, and cooking such as boiling and boiling water can be performed. Newspaper and waste paper can be easily ignited without a igniter, and high fire-starting skills are not required. Compared to stockpiling fuels such as firewood and charcoal, each household has a certain amount of newspaper and waste paper stockpiled, which can reduce the cost for local governments to stockpile fuel in case of a disaster.

FIG. 1 is a perspective view of a cooking stove according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a state where the pot is separated from the oven device of the oven cooking tool. FIG. 3 is a right side view of the cooking stove. FIG. 4 is a front view of the cooking stove. FIG. 5 is a plan view of the furnace device. FIG. 6 is a cross-sectional view of the cooking stove along line AA in FIG. FIG. 7 is an explanatory diagram showing the flow of air and heat inside the furnace device during combustion. FIG. 8 is a perspective view of a cooking stove according to a second embodiment of the present invention, as viewed diagonally from the front. FIG. 9 is a perspective view of the cooking stove seen from the right side. FIG. 10 is an exploded view of the cooking stove. FIG. 11 is a plan view of the cooking stove. FIG. 12 is a cross-sectional view taken along line 12-12 in FIG. FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. FIG. 14 is a cross-sectional view taken along line 14-14 in FIG. FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. FIG. 16 is a sectional view of the furnace cooking tool passing through the center of the fire spout and the pot, showing a state where fuel is burning inside the furnace main body. FIG. 17 is a photograph showing a state in which re-combustion started when the kettle was removed before the fuel came into contact with the bottom of the kettle and was not burned out. FIG. 18 is a perspective view showing a storage state in which the pot and the support are stored in the furnace main body. FIG. 19 is a photograph of the furnace cooking tool according to the third embodiment of the present invention taken from diagonally from the front. FIG. 20 is a photograph of the cooking stove taken diagonally from behind. FIG. 21 is a photograph taken diagonally from the front of the furnace device. FIG. 22 is a photograph of the furnace device taken from diagonally rearward. FIG. 23 is a plan view of the cooking stove. FIG. 24 is a photograph of a frame member for manufacturing the furnace body. FIG. 25 is a cross-sectional view along the fire opening of the furnace device. FIG. 26 is a plan view of a cooking stove according to a fourth embodiment of the present invention.

<First embodiment>
Hereinafter, the cooking stove 10 will be explained with reference to the drawings. To make the explanation easier to understand, in FIG. 1, the left side of the drawing where the fire port 33 is formed is referred to as the "front".

As shown in FIGS. 1 to 6, the furnace cooking tool 10 can be composed of a furnace device 20 and a pot 50.

First, the pot 50 will be described. The pot 50 is a bowl-shaped fireproof container with a bottom 51, and a lid 53 (see FIG. 1) is removably attached to the top surface. The pot 50 has a substantially circular cross section, and can be exemplified by a round pot curved in an R shape toward the bottom. It is desirable that a protrusion 52 such as a flange or handle protruding toward the outer circumference is formed on the upper edge or side surface of the pot 50. This is for positioning the pot 50 in the height direction using the protrusion 52 when it is placed on the furnace device 20.

As the pot 50, a rice cooker having a flange-shaped protrusion 52 formed on the upper edge as shown in the figure can be used. This is because the protrusion 52 is used when positioning the pot 50 in the furnace device 20. You can use the rice cooker that is used for rice cookers as is. In addition, the pot 50 may include a pot with a protrusion formed in the middle. Of course, the pot 50 may be a press-molded metal pot, an earthenware pot, a one-handed pot, a two-handed pot, or the like.

The pot 50 is placed on the furnace device 20, as shown in FIGS. 1 to 6. The furnace device 20 includes a bottomed cylindrical furnace body 21 with an open top. The furnace body 21 includes a cylindrical body part 30 and a mouth part 40 at the upper part of the body part 30. As shown in FIG. 5, the furnace main body 21 can have a substantially elliptical shape in plan view. The plan view shape of the furnace main body 21 in FIG. 5 is a generally elliptical shape with a slightly reduced diameter at the rear end, specifically, a generally teardrop shape. As shown in FIGS. 1, 2, 5, etc., the body section 30 is arranged at a position eccentric to the front side with respect to the mouth section 40.

The body portion 30 has a bottom 31 as shown in FIG. 6, and a combustion chamber 32 in which fuel 60 is combusted is formed inside. In the illustrated embodiment, the body portion 30 is circular in cross-section. The combustion chamber 32 is formed directly below the pot 50, and as shown in FIG. 7, the heat of the flame 61 generated in the combustion chamber 32 can be directly transmitted to the pot 50 (arrow Q1). It is preferable that the combustion chamber 32 has a diameter that is approximately the same as or smaller than the diameter of the pot 50. By making the combustion chamber 32 smaller, heat dispersion can be prevented and fuel 60 can be saved.

A fire port 33, which will be described next, is formed on the front side of the body portion 30, and allows the combustion chamber 32 to communicate with the outside. In the combustion chamber 32, as shown in FIG. 6, a rooster 22 is provided at a position slightly away from the bottom surface 31. As shown in FIG. 7, the rostle 22 raises the fuel 60 from the bottom surface 31 of the combustion chamber 32 to enhance the combustion effect, and also functions as an ash remover for removing ash from the fuel burned inside. Note that, although it is desirable that the entire bottom surface 31 of the combustion chamber 32 is closed, an opening passing through the bottom surface 31 may be provided in a portion thereof.

As shown in FIG. 4, the fire port 33 is an opening formed through the front surface of the body portion 30, and is an input port for introducing fuel 60 into the combustion chamber 32 from the outside. The fire port 33 also serves as an intake port for introducing air into the combustion chamber 32. The fire spout 33 is formed on the slightly lower side of the body portion 30, and the lower edge of the fire spout 33 is at approximately the same or slightly higher position than the rostle 22, as shown in FIG. It is desirable that the fire opening 33 be formed in a size that allows the fuel 60, such as newspaper or waste paper, to be rolled up and thrown into it. For example, the fire pit 33 can be set to have a height of 4 cm to 6 cm and a width of 8 cm to 12 cm. The fire pit 33 may be configured to be always open. Of course, in order to prevent the internal ashes from spilling out when the furnace device 20 is stored, etc., a metal door such as a seven-wheeled door may be attached.

The mouth portion 40 is a peripheral wall 41 that is continuous with the upper portion of the body portion 30 . The peripheral wall 41 is formed to surround the upper space of the combustion chamber 32 in which the pot 50 is placed and into which the pot bottom 51 can enter, as well as the exhaust passage 45 and the exhaust port 44 on the rear side thereof. In this embodiment, as shown in FIGS. 1, 2, and 5, the upper edge portion 42 of the peripheral wall 41 has a teardrop-like substantially elliptical shape.

The peripheral wall 41 has a front portion surrounding the upper space of the combustion chamber 32 (on the fire opening side) having a diameter that allows the pot 50 to enter, that is, an inner diameter that is approximately the same as or slightly larger than the outer diameter of the pot 50. . Further, an upper edge 43 (exhaust port side) on the rear surface side of the peripheral wall 41 forming the exhaust port 44 bulges outward away from the pot 50 .

As a specific embodiment, as shown in FIG. 6, the mouth portion 40 is formed to have a diameter that allows the pot bottom 51 to enter into the furnace body 21.

The distance between the peripheral wall 41 and the upper edge 42 of the mouth portion 40 surrounding the front side of the pot 50 and the pot 50 is made as small as possible in order to suppress heat outflow. For example, in consideration of thermal expansion differences, manufacturing errors, etc., the gap S1 (see FIGS. 1, 6, and 7) between the pot 50, the peripheral wall 41, and the upper edge 42 may be approximately 3 mm to 10 mm. suitable.

On the other hand, as shown in FIG. 1, the exhaust port upper edge 43 forming the rear edge of the exhaust port 44 in the upper edge portion 42 has an elliptical shape with a wide gap S2 between it and the pot 50. The space between the side peripheral wall 41 and the pot 50 is widened to form an exhaust passage 45. In order to properly exhaust air and smoke, an exhaust gap S2 is provided between the rear peripheral wall 41 and the upper edge 43 of the exhaust port and the pot 50. It is preferable that the exhaust gap S2 is formed to be 10 mm to 50 mm, and approximately 1/4 to 1/2 of the outer circumference of the pot 50 (approximately 1/2 of the circumference in the figure) is exposed to the exhaust passage 45. This is to trap heat in the combustion chamber 32 and obtain a chimney effect from the exhaust passage 45 and exhaust port 44. If the outer diameters of the furnace body 21 and the pot 50 are increased and the exhaust port 44 becomes too wide, heat may escape through the exhaust port 44 and the chimney effect may also be reduced. For this reason, when the outer diameter of the furnace body 21 or the pot 50 is large, it is desirable that the pot 50 be formed so that about 1/4 to 1/3 is exposed to the exhaust passage 45.

The exhaust passage 45 is defined by the rear circumferential surface of the pot 50 and the rear circumferential wall 41 when the pot 50 is mounted as shown in FIG. 7, and serves as a passage connecting the combustion chamber 32 and the exhaust port 44. Since the circumferential surface of the pot 50 constitutes a part of the exhaust passage 45, the heat of the exhaust gas passing through the exhaust passage 45 can also be used to heat the pot 50. Furthermore, the cost can be reduced compared to the case where the chimney for exhausting smoke is made of a separate member.

Note that the body portion 30 and the mouth portion 40 can be integrally formed to form the furnace main body 21. Of course, the body part 30 and the mouth part 40 may be constructed from separate members and mechanically connected, or the mouth part 40 may be placed on the body part 30 to form the furnace main body 21. The body portion 30 and the mouth portion 40 may be made of metal such as clad steel made by bonding stainless steel to the surface of carbon steel or low alloy steel. Moreover, by making the body part 30 and the mouth part 40 from ceramics (including unglazed ceramics), aluminum die-casting, porcelain, etc., the furnace main body 21 with excellent heat storage properties can be obtained.

A support 23 for holding the pot 50 can be disposed on the upper edge 42 of the peripheral wall 41 configured as described above, as shown by dotted lines in FIGS. 4 and 6. The support 23 is arranged on the front side of the furnace main body 21 so that the furnace 50 is located above the combustion chamber 32. The support 23 supports and positions the protrusion 52 of the pot 50 from below, and regulates the height at which the pot bottom 51 enters the furnace main body 21. The support 23 can be, for example, a frame made of wire. The support 23 can also be made from an annular tube, but since it traps heat, it is preferable to make it from a frame when it is used for cooking rice. In the illustrated embodiment, the support 23 is circular in plan view and is configured to stably hold the protrusion 52 of the hook 50.

The illustrated pot 50 is a rice cooking pot, and 1/3 to 2/3 of the total height L (see FIG. 6) of the pot 50 enters into the stove body 21 by the support 23, and the upper 1/3 to 2 /3 is held so that it is exposed to the outside. Thereby, as will be described later, convection is generated within the pot 50 and rice can be cooked successfully. In the case of a hake pot, the support 23 can be omitted.

The pot 50 can be made of clad steel, aluminum die-casting, porcelain, etc., but by making it made of clad steel, the heat dispersion efficiency can be increased and the inside of the pot 50 can be heated evenly. .

However, by arranging the roaster 22 as shown in FIGS. 4 and 6 in the furnace main body 21 having the above structure, and placing the support 23 (FIGS. 4 and 6) on the upper edge 42, the furnace device 20 can be installed. can get. Food to be cooked, for example, rice and water for cooking rice, are placed in the pot 50, and the pot is closed with a lid 53 as shown in FIGS. 1 and 7.

The pot 50 is placed with the protrusion 52 placed on the support 23. In FIG. 6, the pot 50 extends into the furnace main body 21 from the pot bottom 51 to a height of L/2.

By mounting the pot 50, an exhaust passage 45 connecting the combustion chamber 32 and the exhaust port 44 is formed by the circumferential surface of the pot 50 and the peripheral wall 41 on the rear side of the furnace device 20, as shown in FIG.

Then, as shown in FIG. 7, fuel 60 is put into the fire pit 33 and ignited. As the fuel 60, crumpled newspaper or waste paper can be used. Newspapers and the like are suitable as the fuel 60 because they are easily available even in times of disaster. Examples of used paper include copy paper, magazines, and other papers. Furthermore, compared to stockpiling fuels such as firewood and charcoal, each household has a certain amount of newspapers and other stockpiles, which can reduce the cost for local governments to stockpile fuel in case of a disaster. Of course, firewood, charcoal, etc. can also be used as the fuel 60.

Another advantage of newspapers and the like is that they do not require any ignition agent, are easier to ignite than firewood or charcoal, and do not require a high degree of skill to start a fire.

When the fuel 60 starts to burn in the combustion chamber 32, the pot 50 is directly heated by the flame 61 (arrow Q1). Furthermore, due to the generation of heat, new external air is introduced into the combustion chamber 32 using the fire port 33 as an intake port (arrow P1).

The heat (flame 61) generated in the combustion chamber 32 not only directly heats the pot 50 Q1 as shown in FIG. 7, but also heats the pot 50 by the radiant heat (Q2) of the furnace body 21. Since there is no shield between the pot 50 and the flame 61, the pot 50 can be heated with high efficiency.

In addition, a portion of the heat generated within the furnace main body 21 rises between the front side peripheral wall 41 and the pot 50 as shown by the arrow P2, but a gap S1 between the front side circumferential wall 41 and the pot 50 increases. Since the space is narrow, heat is trapped within the furnace body 21 and difficult to escape, and the pot 50 is heated with high efficiency.

The smoke generated within the combustion chamber 32 passes through the exhaust passage 45 on the rear side of the furnace device 20 and is discharged to the outside from the exhaust port 44 (P3). Also, at this time, fresh external air is introduced into the combustion chamber 32 from the fire port 33 due to the chimney effect (P1). Therefore, even without fanning with a fan or the like, combustion can be continued without being easily extinguished, and scattering of ash can be suppressed.

The heated air flow P3 discharged to the outside passes through an exhaust passage 45 formed by the circumferential surface of the pot 50 and the rear circumferential wall 41. Since the pot bottom 51 of the pot 50 is located at a lower position than the exhaust port 44, it is possible to suppress heat leakage and to receive heat from the flow P3 with high efficiency.

As described above, since the pot 50 is suitably heated, cooking can be carried out using less fuel and in a shorter time.

Note that newspapers and waste paper require less fuel energy than firewood and charcoal, so they need to be fed into the fire pit 33 frequently. The amount and timing of newsprint and waste paper to be added can be adjusted depending on the thickness and size.

In the present invention, since the rostle 22 is disposed in the combustion chamber 32, the ash generated by combustion falls from the rostle 22 and is separated on the bottom surface 31 side of the combustion chamber 32. Therefore, the air flow is prevented from being obstructed by the ash, and combustion can be stabilized. Moreover, since the ash can be separated, scattering of the ash from the exhaust port 44 can also be suppressed.

In the case of a rice cooker having a flange-shaped protrusion 52 on the upper edge (the illustrated pot 50 is a rice cooker), the upper side of the pot 50 is exposed from the stove body 21 by placing the protrusion 52 on the support 23. be able to. As a result, since the upper part of the pot 50 is configured to be able to dissipate heat, there is a temperature difference between the top and bottom of the pot 50 with respect to the heated pot bottom 51, which appropriately generates convection and suppresses the momentum of boiling. can. Therefore, the rice can be cooked deliciously without boiling over.

When cooking (cooking rice) is completed, the supply of fuel 60 may be stopped. If you want to keep it warm, you can periodically add newspaper or the like.

Cooking is not limited to cooking rice, and may include boiling or boiling water.

<Second embodiment>
A second embodiment of the present invention will be described below. In addition, unless otherwise specified, in this embodiment and the following third embodiment, members with the same names and symbols as those in the first embodiment mean the same or substantially equivalent members, including the method of use. , description will be omitted as appropriate.

8 to 18 show a cooking stove 10 according to a second embodiment of the present invention. As shown in FIGS. 8 to 10, the furnace cooking utensil 10 includes a furnace device 20 (the furnace main body 21), a pot 50, a lid body 53, and a support for placing the pot 50 on the stove device 20, as in the first embodiment. It includes a tool 23. In the second embodiment, the cooking stove 10 includes a furnace device 20 having a circular shape in a plan view, a pot 50 having a circular shape in a plan view eccentrically placed toward the front side, and an exhaust passage 45 and an exhaust port 44 on the rear side. Letting it be formed. As a result, as shown in FIG. 12, the gap S2 between the pot 50 forming the exhaust port 44 and the upper edge 42 of the furnace body 21 that surrounds the rear side of the pot 50 is equal to the gap S2 on the front side of the pot 50. It is wider than S1.

As shown in FIG. 10, the rice cooker 50 is a rice cooker having a flange-like protrusion 52 on its upper edge. Further, as shown in FIGS. 11 to 13, the lid body 53 has a larger diameter than the pot 50, is provided with a knob 53a on the top surface, and has a bottom surface that abuts the protrusion 52 of the pot 50 from inside. A stopper 53b is formed.

As best shown in FIG. 10, the furnace device 20 mainly includes a furnace main body 21 having a circular upper edge 42, a cylindrical body portion 30, and a bottom surface 31. As shown in FIGS. 12 and 13, the body portion 30 has a necking portion 30a that is necked near the upper edge 42 and has a reduced inner diameter. This necking part 30a serves to direct the flame and hot air discharged upward from the furnace main body 21 to the pot 50 inward. Furthermore, an annular support receiver 42a on which the support 23 is placed is recessed in the upper edge 42 of the furnace main body 21, as shown in the cross-sectional view 12 and the like.

As shown in FIGS. 8 to 10, 14, and 15, a fire opening 33 is provided at the bottom of the front surface of the furnace body 21. As shown in FIGS. In the illustration, two fire ports 33 are formed, and these fire ports 33 are formed side by side on the front surface of the furnace main body 21. As shown in FIG. 14, the fire opening 33 is formed at a position higher than the roaster 22 and lower than the bottom surface 51 of the pot 50 on which it is placed.

Each fire pit 33 can be set to have a height of 4 cm to 6 cm and a width of 8 cm to 12 cm, as in the first embodiment. When two fire ports 33 are formed, the distance between the fire ports 33 varies depending on the diameter of the furnace main body 21, but is preferably about 2 cm to 10 cm. As shown in FIG. 15, the fire ports 33, 33 can be formed so that the intersection angle I of the center line C connecting each center and the center of the furnace body 21 is about 30 degrees to 150 degrees. desirable. This is because when the intersection angle I becomes large (for example, close to 160 degrees to 180 degrees), the fuel 60 put in from one kindling port 33 will jump out from the other kindling port 33, or the fuel put in from one kindling port 33 will This is because there is a risk that the fuel 60 being burned in the combustion chamber 32 may be pushed out from the other combustion port 33. In addition, when three or more fire outlets 33 are formed, as shown in FIG. 25 described later, the intersection angle I of the center lines C of the fire outlets 33 located on the outside is 30 degrees to 150 degrees. It is desirable to do so.

A rooster 22 is arranged in the furnace main body 21. The rostle 22 can have a vertical lattice shape as shown in FIG. 15, a mesh shape, a horizontal lattice shape, or a planar lattice shape in order to drop the burned ash to the bottom of the furnace main body 21. It is desirable that the roaster 22 be positioned in the furnace main body 21. For example, as shown in FIG. 12, the furnace main body 21 has a positioning hole 21a in the bottom surface 31, and the roaster 22 has a protruding hook 22a. As a result, when attaching the rostle 22 to the furnace main body 21, the rostle 22 can be positioned by inserting the hanging piece 22a into the positioning hole 21a, and if the rostle 22 is provided with a restraining wall 24, which will be described next, can be installed in the correct direction. In addition, in place of the rostre 22, projections may be provided on the bottom surface 31 of the furnace main body 21 to form an uneven shape, and the ash may fall between the projections.

The cooking stove 10 of the present embodiment has a structure in which a pot 50 is eccentrically arranged on the front side of the oven device 20. Therefore, in order to efficiently burn the newspaper serving as the fuel 60 and heat the pot 50, the furnace main body 21 burns the fuel 60 directly below the pot 50 on the front side of the furnace main body 21, and the exhaust passage is provided at the rear. It is necessary to secure 45. For this reason, as shown in FIGS. 12 to 15, the rostol 22 is provided with a restraining wall 24 on the rear side to prevent the movement of the fuel 60. The restraining wall 24 can have a height of 2 cm to 6 cm. Note that it is desirable to form the restraining wall 24 on the rostol 22 because it reduces the number of parts and makes cleaning easier, but it may be formed as a separate member from the rostol 22.

A pot 50 is placed on the furnace device 20. In this embodiment, since both the furnace device 20 and the pot 50 have a circular shape, the pot 50 is arranged eccentrically toward the front side of the furnace device 20, as shown in FIGS. 8, 9, 11, and 12. , the exhaust passage 45 and the exhaust port 44 are arranged on the rear side. In order to enable such an arrangement, the support 23 has a configuration in which the upper frame 23b forming the upper edge is eccentric to the lower frame 23a forming the lower edge, as shown in FIG. More specifically, the lower frame 23a is made of an annular metal wire that fits into the support receiver 42a of the upper edge 42 of the furnace main body 21. The upper frame 23b can also be configured by forming a metal wire into an annular shape and connecting the upper frame 23b with a connecting piece 23d so as to be eccentric with respect to the lower frame 23a. In this embodiment, as shown in FIG. 10, the upper frame 23b is an arc-shaped hook support part 23c, and is composed of a connecting piece 23d whose both ends are bent downward and reach the lower frame 23a. ing. Further, for reinforcement, the hook supporting portion 23c and the lower frame 23a are connected by a reinforcing piece 23e. The pot support part 23c is positioned at the front and back, respectively, when the support 23 is attached to the furnace main body 21, so that there are no frames on the left and right sides that come into contact with the pot 50. Thereby, when the user grasps the left and right protrusions 52 of the pot 50 and lifts the pot 50, the user does not put his/her fingers on the frame, so that lifting the pot 50 together with the support 23 can be prevented.

As described above, since the upper frame 23b of the support 23 is eccentrically forward with respect to the lower frame 23a, the support 23 has front and rear mounting orientations. In order to avoid confusing the front and rear directions of the support 23, a positioning protrusion 23f is provided on the lower frame 23a of the support 23 as shown in FIG. As shown in FIG. 2, a positioning recess 42b into which the positioning protrusion 23f fits is provided. The positioning protrusion 23f can be formed, for example, by protruding the lower end of the rear reinforcing piece 23e below the lower frame 23a. This allows the support 23 to be attached to the furnace main body 21 in the correct orientation.

The furnace cooking utensil 10 is created from each member having the above configuration. First, as shown in FIGS. 12 to 15, the roistle 22 is placed inside the furnace main body 21 having the above structure. As shown in FIG. 12, the rotor 22 can be positioned without shifting by inserting the hanging piece 22a into the positioning hole 21a, and can be installed in the correct direction.

Subsequently, the support 23 is attached to the furnace main body 21. As shown in FIG. 12, the support 23 can be correctly attached in the front-rear direction by fitting the positioning protrusion 23f into the positioning recess 42b.

Then, the food to be cooked is placed on the support 23, and the pot 50 with the lid 53 attached is placed thereon. The pot 50 is placed so that the protrusion 52 is in contact with the upper frame 23b. As shown in FIG. 10, the upper frame 23b of the support 23 has the hook supporting portions 23c arranged in the front and back, so that the user can hold the hook 50 so that the fingers grasping the hook are positioned on the left and right sides of the furnace main body 21. By placing , the pot 50 can be placed on the pot without pinching fingers.

As shown in FIG. 8, FIG. 9, FIG. 12, etc., it can be seen that the pot 50 is arranged eccentrically forward with respect to the furnace main body 21. In the furnace main body 21, the combustion chamber 32 is located directly below the kettle 50, that is, on the front side of the suppression wall 24, and the gap S2 formed between the rear of the kettle 50 and the body portion 30 of the furnace main body 21 is an exhaust passage 45. becomes. The upper end of the exhaust passage 45 becomes the exhaust port 44.

Then, as shown in FIG. 16, fuel 60 is put into the fire pit 33 and ignited. In the second embodiment, since two combustion ports 33 are provided, the first fuel 60 is introduced from one of the combustion ports 33, as shown by reference numeral 1 in FIG. The fuel 60 is, for example, rolled up newspaper. By providing the suppression wall 24 in the combustion chamber 32, as shown in FIG. 16, the burning fuel 60 can pass through the combustion chamber 32 and move to the lower side of the exhaust passage 45 and exhaust port 44. can be prevented. Thereby, the fuel 60 can be retained in the combustion chamber 32, and the flame 61 can be efficiently used for heating Q1 of the pot 50.

After the first fuel 60 is injected, the subsequent fuel 60 is injected from the other combustion port 33, as shown by reference numeral 2 in FIG. The subsequent fuel 60 is alternately injected into the two combustion ports 33 (numerals 3, 4, 5, . . . ). By charging the fuel 60 from the other fire port 33 before the fuel 60 charged from one fire port 33 is combusted, a decrease in the amount of heat can be prevented. In addition, by alternately introducing the fuel 60 from the plurality of combustion ports 33, it is possible to prevent the fuel 60 from being introduced in such a way as to push the burning fuel 60 deep into the combustion chamber. This solves the problem of not being able to input the appropriate amount of fuel 60. Thereby, the fuel 60 can be efficiently combusted within the combustion chamber 32.

When the fuel 60 starts to burn in the combustion chamber 32, the flame 61 directly heats the pot 50 (arrow Q1) as shown in FIG. Air is introduced into the combustion chamber 32 (arrow P1).

The heat (flame 61) generated in the combustion chamber 32 not only directly heats the pot 50 Q1, but also heats the pot 50 by the radiant heat (Q2) of the stove body 21. Since there is no shield between the pot 50 and the flame 61, the pot 50 can be heated with high efficiency. In this embodiment, since the diameter of the upper edge of the body part 30 of the furnace body 21 is reduced by the necking process 30a, the flame and hot air P2 discharged upward from the furnace body 21 are transferred to the inner surface of the body part 30 whose diameter has been reduced. It is possible to apply heat to the pot 50 more effectively along the direction toward the pot 50 side.

As described above, since the pot 50 is suitably heated, cooking can be carried out using less fuel and in a shorter time.

At high temperatures, newspaper, which serves as fuel 60, burns out in one and a half to two minutes. Therefore, in order to obtain high thermal power, it is necessary to inject the fuel 60 at intervals of one minute (see Examples). If the fuel 60 is continuously injected from the same fire port 33, the fuel 60 that was injected first and has not yet been completely burned will be pushed backwards, which may reduce the combustion efficiency. However, in this embodiment, there are two combustion ports 33, and the fuel 60 can be input from the combustion ports 33 alternately as shown by reference numerals 1, 2, . . . in FIG. Therefore, the fuel 60 that was previously introduced is not pushed in, and the fuel 60 can be burned with high efficiency.

As shown above and in FIG. 16, the fire spout 33 is formed at a lower position than the bottom surface 51 of the pot 50 on which it is placed, but it is formed at a height where the bottom surface 51 of the pot 50 overlaps the fire spout 33. If formed, the newspaper may hit the bottom surface 51 of the pot 50. Furthermore, even when a large amount of newspaper, which is the fuel 60, is thrown into the fire port 33, the newspaper may come into contact with the bottom surface 51 of the pot 50. In this way, when the newspaper hits the bottom surface 51 of the pot 50, the newspaper is not partially combusted and remains unburned. The generation of unburned remains leads to a decrease in combustion efficiency and the generation of smoke. In particular, when cooking completion is managed by the number of newspapers used, if unburned remains occur, cooking may not be completed even after adding newspapers. Furthermore, FIG. 17 shows a state in which the pot 50 is removed from the furnace cooking utensil 10 in which unburned remains are being generated. Sometimes I end up doing it. For this reason, it is preferable that the fire opening 33 be formed at a position lower than the bottom surface 51 of the pot 50 on which it is placed, and that newspapers should not be thrown in too much at once, but only after combustion has progressed to a certain extent.

FIG. 18 shows the furnace cooking utensil 10 after use. In this embodiment, the outer diameter of the pot 50 is smaller than the inner diameter of the stove body 21, so the support 23 is inserted upside down into the furnace body 21, and the pot 50 and lid body are inserted from above. 53, the furnace cooking utensil 10 can be stored compactly as shown in FIG.

<Third embodiment>
19 and 20 are photographs of the cooking stove 10 of the third embodiment viewed from an oblique direction. In the third embodiment, the furnace device 20 is manufactured by forming the body portion 30 of the furnace main body 21 with cement 26 inside the aluminum cylinder 25.

As shown in FIGS. 21 and 22, the furnace main body 21 has a combustion chamber 32 in the center whose peripheral surface is made of cement. As shown in the plan view 23, the upper edge portion 42 of the furnace main body 21 has a semicircular shape on the front side along the circumferential surface of the pot 50 (dotted chain line 50a), and extends rearward from both edges of the semicircular shape. , is opened so as to close in an arc shape along the circumferential surface of the barrel 25. The exhaust port 44 is a space formed in a gap S2 between the rear surface of the pot 50 and the arcuate upper edge 43 of the exhaust port along the circumferential surface of the barrel 25. This gap S2 is formed wider than the gap S1 between the front surface of the pot 50 and the arcuate upper edge 42.

As shown in FIGS. 21 and 22, the body portion 30 has a necking portion 30a in which an upper edge portion 42 has a reduced diameter.

Further, three fire openings 33 of the furnace main body 21 are provided in the front.

The furnace main body 21 having the above structure can be manufactured in the following manner. First, three holes that will become the fire opening 33 are opened in the front of the barrel 25 using a hole saw or the like. Next, as shown in FIG. 24, a cylindrically wound urethane frame 70 having the shape of the combustion chamber 32 and the upper edge 42 is produced, and the urethane frame 70 is housed in the aluminum cylinder 25. As shown in the figure, the urethane frame 70 has a reduced diameter frame 71 on the upper side with a smaller diameter so that the upper edge 42 is reduced in diameter, and an arcuate frame member 72 is attached at a position corresponding to the exhaust port. Note that the dimensions 73 in the frames 70 and 71 in FIG. 24 are for preventing the urethane from losing its shape. Cylindrical urethane frames 74 (three) are inserted into the fire opening 33. Then, cement is poured into a mold made up of the cylinder 25 and the urethane frame 70, and after the cement has hardened, the urethane frames 70, 74 are removed. By using the frames 70 and 71, the necked body section 30 can be easily produced.

As shown in FIG. 21, a roaster 22 is placed on the manufactured furnace device 20, a support 23 is placed thereon, and a pot 50 is placed (FIGS. 19 and 20).

In this embodiment, the pot 50 is provided with a resin handle 52a on the outer periphery of a protruding portion 52 such as a flange. If the handle 52a made of resin comes into direct contact with flame, it may become scorched or burnt. Therefore, as shown in FIGS. 20 and 23, the pot 50 is placed so that the handles 52a are located on the left and right sides outside the upper edge 42, so that the handles 52a do not come into direct contact with the flame, and I try not to touch the heat. Referring to FIG. 23, it can be seen that the protrusion 52 of the pot 50 protrudes outward from the upper edge 42 of the stove body 21, and the handle 52a is located further outward.

Then, newspaper serving as fuel 60 is put in from the fire pit 33. In this embodiment, since there are three fire ports 33, the fuel 60 can be poured into the fire ports 33 at predetermined time intervals (for example, one minute) in the order of, for example, the right side, the center, and the left side. In addition, as shown in FIG. 25, the fuel 60 is first poured into the central fire port 33 (code 1), then the fuel 60 is simultaneously poured into the left and right fire ports 33 (code 2), and then the fuel 60 is poured into the center fire port 33 (code 2) again. The fuel 60 may be supplied in the order of numeral 3), left and right (numeral 4), and so on. By simultaneously injecting the fuel 60 from the left and right combustion ports 33, twice the amount of fuel 60 can be simultaneously injected into the combustion chamber 32, so that the thermal power can be increased. This method is particularly effective when the size of the pot 50 is large (10 cups in the embodiment).

When the fuel 60 is charged, the pot 50 is heated similarly to the first embodiment and the second embodiment. The pot 50 has a handle 52a made of resin, but as shown in FIG. 23, the gap between the left and right sides of the pot 50 and the upper edge 42 of the furnace body 21 is very narrow, and the handle 52a protrudes from the left and right. ing. Therefore, it is possible to suppress the handle 52a from being heated by the flame, and it is possible to prevent scorching or the like.

In this embodiment, the body portion 30 of the furnace main body 21 is made of cement 26 using frames 70, 71 made of urethane. It can be manufactured by DIY even if you are not a professional processor, and has the advantage that by changing the sizes of the frames 70, 71, etc., you can manufacture the furnace device 20 to match the furnace 50 you own.

<Fourth embodiment>
FIG. 26 shows a cooking stove 10 according to a fourth embodiment of the present invention. The furnace cooking utensil 10 of the fourth embodiment is the furnace cooking utensil 10 of the second embodiment in which a pot 50 with a circular outer diameter is mounted on a furnace main body 21 with a circular inner diameter, but the size of the pot 50 is increased. (The pot 50 of the second embodiment is a 5-cup pot, and the pot 50 of the fourth embodiment is a 10-cup pot.) As the size of the oven 50 increases, the inner diameter of the oven body 21 must also increase in order to secure the exhaust port 44. In the circular furnace body 21 and the pot 50, by increasing the inner diameter of the furnace body 21, a large crescent-shaped exhaust port is formed between the stove body 21 and the pot 50.

When cooking rice using a stove with this large crescent-shaped exhaust port, the rice in the center of the pot could be cooked, but the left and right sides could not be cooked, resulting in uneven cooking. When we investigated the cause of this uneven cooking, we found that the air flow from the combustion chamber toward the exhaust port is concentrated near the center of the crescent-shaped exhaust port, where the opening is widest, resulting in the heating of the flame and pot also being concentrated near the center. It turned out that this was because the left and right sides of the pot were not heated enough.

Therefore, in this embodiment, as shown in FIG. 26, a branch wall 43a that divides the exhaust port 44 is protruded from the center of the upper edge 43 of the exhaust port. The branch wall 43a is configured to extend inward toward the circumferential surface 50a of the pot 50 on which it is placed, and has an arcuate tip along the circumferential surface 50a of the pot 50. Incidentally, the furnace main body 21 can be formed by hardening cement 26 inside the cylinder 25 using a frame, as in the third embodiment.

With the pot 50 placed on the furnace main body 21, the exhaust port 44 is divided into left and right exhaust ports 44a, 44a by the branch wall 43a. That is, the large crescent-shaped exhaust port becomes two left and right exhaust ports 44a, 44a. When fuel 60 is put into the cooking stove 10 having this configuration through the fire port 33 (see the third embodiment), the general flow of air from the fire port 33 through the combustion chamber 32 toward the exhaust ports 44a, 44a during rice cooking is as follows. , as shown by arrows R1 and R2 in plan view in FIG. Specifically, the air flow R1 from the central fire port 33 passes directly under the pot 50, branches to the left and right, and is exhausted from the exhaust ports 44a, 44a. Moreover, the air flow R2 from each of the left and right fire ports 33 passes through the left and right lower portions of the pot 50, and is exhausted from the left and right fire ports 33, respectively. The airflow paths R1 and R2 also serve as paths for the flame, so by branching the airflow R toward the exhaust ports 44a and 44a, the heating to the pot 50 is evenly distributed without being concentrated in the center. The pot 50 is heated almost uniformly. As a result, even if a large pot 50 is used, uneven cooking can be prevented.

Note that, as shown in FIG. 26, the branch wall 43a is not formed directly on the upper edge 43 of the exhaust port, but rather has a configuration in which a plate-shaped member, block, brick, etc. is placed on the upper edge 43 of the exhaust port to block the center of the exhaust port 44. There may be.

The furnace cooking tool 10 shown in FIG. 1 of the first embodiment was manufactured, and rice was cooked. A rice cooker for 5 cups used in an electric rice cooker was used as the pot 50, and 3 cups of rice were put into the pot 50 together with water, and the rice was closed with a lid 53.

Newspaper (a spread cut in half was counted as one sheet) was used as fuel. The newspapers were pressed one by one into a toilet paper roll and rolled up, then removed from the roll and made into a lump.

The pot 50 was placed on the furnace device 20, and one newspaper block was first put into the fire pit 33 to ignite it. Ignition could be easily done with a match or lighter.

In order to cook rice, it is preferable to heat it over low heat at first, so after adding the first sheet, a total of five newspaper blocks were placed through the fire port 33, one at a time every 2 minutes.

Next, in order to cook the rice, a total of 10 newspaper blocks were thrown into the fire port 33, one every minute.

After putting the 10th newspaper block into the fire pit 33, it was left to steam for 15 minutes, and when the lid 53 was opened, the rice was cooked.

Even though the rice was cooked over an open flame, it was beautifully cooked and delicious with little burnt. In addition, when keeping warm, it is sufficient to throw one piece of newspaper from the fire pit 33 every 30 minutes and ignite it.

According to the furnace device 20 and the furnace cooking utensil 10 of the present invention, as described above, it was possible to cook 3 cups of rice using only 15 sheets of newspaper, and it was possible to achieve a reduction in fuel consumption. It was possible to cook rice with 13 sheets of newspaper for 2 cups and 17 sheets of newspaper for 4 cups.

The reason why the furnace device 20 of the present invention was able to successfully cook rice even when using a small amount of poor fuel 60 such as newspaper is because the heat is trapped in the front side (fire opening side) inside the furnace device 20 and is difficult to escape. 7), the pot 50 is heated with high efficiency, and a part of the exhaust passage 45 is constituted by the pot 50, so that the heated air flow P3 passing through the exhaust passage 45 causes the pot to be heated. The reasons include that the pot 50 was heated, and that the bottom 51 of the pot was located at a lower position than the exhaust port 44, so that heat leakage could be suppressed. In addition, in the case of firewood, less than 10% of the generated thermal energy is used for cooking rice, but in the furnace cooking tool 10 of the present invention, about 90% of the thermal energy of the newspaper block can be used for heating the pot 50, It is thought that rice could be cooked with a small amount of newspaper blocks.

Another advantage of using newspaper as the fuel 60 is that it is more readily available than firewood or the like. Additionally, newspapers do not require the same level of fire-starting skills as firewood, nor do they require a ignition agent. Furthermore, in the case of newspaper, it is easy to adjust the firepower. In the above embodiments, newspaper is used as an example, but other papers other than newspaper, such as copy paper and magazines, can also be used. In that case, by adjusting the input amount and timing according to the thickness and size of the paper, it becomes possible to cook rice in the same way.

As described above, the oven cooking tool 10 of the present invention can cook rice with a small amount of newspaper blocks, and is suitable as a cooking tool for heating during disasters, camping, etc.

The above description is for illustrating the present invention, and should not be construed to limit the invention described in the claims or to restrict its scope. Furthermore, it goes without saying that the configuration of each part of the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the technical scope of the claims.

For example, the thickness, size, width, etc. of each member are merely examples, and are not limited to the above embodiments. In addition, regarding the shape of the furnace body 21 and the pot 50, expressions such as circular and oval include not only true circle and true oval, but also substantially circular, oval, approximately circular, approximately oval, etc. Please understand that this will happen.

10 Furnace cooking utensil 20 Furnace device 21 Furnace main body 23 Support 30 Body part 32 Combustion chamber 33 Burning spout 40 Mouth part 41 Peripheral wall 42 Upper edge 43 Upper edge of exhaust outlet 44 Exhaust outlet 45 Exhaust passage 50 Pot 51 Pot bottom 52 Projection part 60 Fuel S1 Gap S2 Exhaust gap

Claims (13)

A combustion port that also serves as an intake port is opened through the front surface of the bottomed cylindrical furnace body , which serves as a combustion chamber for burning fuel. A furnace device having an upper edge portion in the upper part of the chamber into which the pot bottom of the pot can enter ,
a support for positioning and holding the pot near the front of the furnace main body;
When the pot is positioned and held on the support, the upper edge of the oven body is located between the rear side of the oven body and the circumferential wall of the oven, rather than the gap between the front side of the oven body and the circumferential wall of the oven. The upper edge of the exhaust port has a wide gap with the peripheral wall, and the exhaust port is formed between the upper edge of the exhaust port and the peripheral surface of the pot. An exhaust passage communicating with the exhaust port is formed by the peripheral surface of the exhaust port.
Furnace equipment. The upper edge of the furnace main body and the pot are circular in plan view, the diameter of the pot is smaller than that of the upper edge, and the pot is arranged eccentrically toward the front side.
A furnace apparatus according to claim 1. The upper edge of the exhaust port has a branch wall that extends toward the pot and divides the exhaust port into left and right sides.
A furnace apparatus according to claim 2. The furnace body has an upper edge on the rear side that bulges outward.
A furnace apparatus according to claim 1. The upper edge has an elliptical shape in plan view,
The combustion chamber is eccentrically arranged toward the front side.
A furnace apparatus according to claim 1. Two or more of the fire openings are opened side by side on the front surface of the furnace main body,
A furnace device according to any one of claims 1 to 5 . The furnace main body has a necking portion in which the inner surface of the combustion chamber is reduced in diameter toward the upper edge.
A furnace device according to any one of claims 1 to 5 . The pot bottom of the pot can be arranged so that 1/3 to 2/3 of the total height of the pot penetrates into the furnace main body.
A furnace device according to any one of claims 1 to 5 . The furnace main body includes a support for holding the pot at a position higher than the upper edge.
The furnace apparatus according to claim 8. The fire opening is opened below the bottom of the pot of the pot to be placed.
A furnace device according to any one of claims 1 to 5 . The furnace main body is provided with a rostrum that floats the fuel from the bottom surface of the furnace main body .
A furnace device according to any one of claims 1 to 5 . The rostle has a suppression wall that prevents the fuel input from the fire port from moving to the rear side.
The furnace apparatus according to claim 11. A furnace cooking utensil comprising the furnace device according to any one of claims 1 to 5, in which the pot is arranged.

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