JP7387166B2 - stove - Google Patents

Description

The present invention relates to a stove that can be used mainly outdoors for heating, cooking, and the like.

BACKGROUND ART Stoves called Swedish torches made from processed log materials have been known for some time (for example, see Patent Document 1).
However, although traditional Swedish torches have slits or elongated holes, they are difficult to ignite, have poor combustion efficiency, and generate a lot of smoke, and also have weak firepower. It was difficult to use.

Registered utility model No. 3213970

An object of the present invention is to provide a stove that is easy to ignite, has good combustion efficiency, and has strong firepower.

The present invention solves the above problems by the following solving means. Note that, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto.

A first aspect of the present invention is a chimney part (2) extending linearly in the vertical direction, and a space communicating with the lower part of the chimney part (2), wherein at least the lower part of the space is connected to the chimney part (2). ); and an intake port (4) that communicates with the combustion chamber (3) from the outside and opens to the side, and includes at least the chimney portion (2) and the A member constituting the combustion chamber (3) is a stove (1) made of a combustible material.

A second invention is the stove (1) according to the first invention, wherein the intake port (4) extends linearly toward a position offset from the center of the combustion chamber (3). This is a stove (1) characterized by the following.

A third invention is the stove (1) according to the first invention or the second invention, in which the air intake port (4) is configured to be connected to the combustion chamber in a transparent state when the stove (1) is viewed from above. The stove (1) is characterized in that it extends along the inner wall of the chamber (3).

A fourth invention is the stove (1) according to any one of the first to third inventions, wherein the intake port (4) communicates with a lower end of the combustion chamber (3). This is a stove (1) characterized by the following.

A fifth invention is the stove (1) according to any one of the first to fourth inventions, wherein the chimney part (2) and the combustion chamber (3) are arranged in the chimney part (2). This stove (1) is characterized in that it is configured in the shape of a rotating body centered at a central position.

A sixth invention is the stove (1) according to any one of the first invention to the fifth invention, wherein the outer shape of the stove (1) is a substantially cylindrical shape, and a center of the substantially cylindrical shape is provided. This stove (1) is characterized in that the direction in which the chimney portion (2) extends substantially coincides with the direction in which the chimney portion (2) extends.

A seventh invention is the stove (1) according to any one of the first invention to the sixth invention, characterized in that the stove (1) is entirely constructed of a log. This is a stove (1).

An eighth invention is the stove (1) according to any one of the first invention to the seventh invention, wherein the upper end surface is configured to be substantially flat, and the upper end surface of the chimney part (2) has a crater at the upper end. The stove (1) is characterized in that it includes a windshield (20) surrounding the periphery of (2a) and disposed on the upper end surface.

A ninth invention is the stove (1) according to any one of the first invention to the eighth invention, wherein the upper end surface is configured to be substantially flat, and the upper end surface of the chimney part (2) has a crater at the upper end. This stove (1) is characterized by comprising a trivet (10) on which cooking utensils can be placed at a predetermined distance from the stove (2a).

A tenth invention is the stove according to any one of the first invention to the seventh invention, wherein the upper end surface is configured to be substantially flat, and the upper end surface of the chimney part (2) has a fire port (2a) at the upper end of the chimney part (2). A trivet-combined windshield (30) is disposed on the upper end face surrounding the chimney portion (2) and allows cooking utensils to be placed at a predetermined distance from the fire port (2a) at the upper end of the chimney portion (2). This is a stove (1) characterized by the following.

According to the present invention, it is possible to provide a stove that is easy to ignite, has good combustion efficiency, and has strong firepower.

1 is a diagram showing a first embodiment of a stove 1 according to the invention. FIG. It is a figure which looked at stove 1 from the front. It is a figure which looked at stove 1 from the top. It is a figure explaining the combustion state of stove 1 of this embodiment. It is a figure explaining the trivet 10 and the windshield 20. FIG. 3 shows a second embodiment of the stove 1 according to the invention. It is a figure which shows the 3rd embodiment of the stove 1 according to this invention. It is a figure which shows the 4th embodiment of the stove 1 according to this invention. It is a figure which shows the 5th embodiment of the stove 1 according to this invention.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings and the like.

(First embodiment)
FIG. 1 shows a first embodiment of a stove 1 according to the invention.
FIG. 2 is a front view of the stove 1.
FIG. 3 is a top view of the stove 1.
Note that each figure shown below, including FIGS. 1 to 3, is a schematic diagram, and the size and shape of each part may be exaggerated or omitted as appropriate to facilitate understanding. It is shown as follows.
Further, in the following description, specific numerical values, shapes, materials, etc. are shown, but these can be changed as appropriate.
Note that the specific numerical values specified in this specification and claims should be treated as including general error ranges. In other words, a difference of approximately ±10% is essentially no difference, and a value set in a range slightly exceeding the numerical range of the present invention is, in fact, not a difference of the present invention. It should be interpreted as within the range.

The stove 1 of this embodiment is manufactured by hollowing out a portion of the inside of a log, and the overall shape is formed into a cylindrical shape obtained by cutting the log into rings. In addition, since the stove 1 is used with the direction in which the central axis of the cylinder extends as shown in FIG.

The stove 1 includes a chimney 2, a combustion chamber 3, and an intake port 4, and as described above, the stove 1 is entirely made of wood (logs), so the overall external shape is approximately cylindrical. The top and bottom surfaces are flat. In this embodiment, the outer circumferential surface of the stove 1 does not have a precise cylindrical shape because it has a natural texture with the outer skin (bark) of the cut wood being peeled off. In addition, for example, the outer shape of the stove may be processed into a more accurate cylindrical shape by lathe processing, or the outer shape may be processed into a hexagonal shape, a pentagonal shape, or the like. Moreover, on the contrary to this, the outer peripheral surface of the stove 1 may leave the outer skin (bark) of the cut wood as it is.

The chimney portion 2 is a cylindrical hole provided extending in the vertical direction where the center of the generally cylindrical outer shape of the stove 1 extends. The upper end of the chimney portion 2 is a crater 2a that opens on the top surface of the stove 1, and during combustion, flames come out from the crater 2a. Moreover, the inner wall surface of the chimney part 2 of this embodiment is cylindrical.

The combustion chamber 3 is a space communicating with the lower part of the chimney part 2. The combustion chamber 3 is a generally truncated conical space. The upper end of the combustion chamber 3 is connected to and communicates with the chimney portion 2 at the same inner diameter. The lower end of the combustion chamber 3 is configured to have a larger inner diameter than the upper end. Therefore, the combustion chamber 3 is configured to be wider (inner diameter is larger) than the chimney portion as it goes downward. Furthermore, the centers of the chimney portion 2 and the combustion chamber 3 are aligned. That is, the chimney part 2 and the combustion chamber 3 are configured in the shape of a rotating body centered on the center position of the chimney part 2.

The intake port 4 communicates with the lower end of the combustion chamber 3 from an opening 4a that opens laterally to the outside. The intake port 4 extends linearly toward a position offset from the center of the combustion chamber 3. More specifically, the intake port 4 is located at a position offset from the center of the combustion chamber 3 and extends along the inner wall of the combustion chamber 3 in a transparent state when the stove 1 is viewed from above. ing. In other words, the intake port 4 extends substantially along the tangential direction of the inner wall of the combustion chamber formed in the shape of a rotating body.

Here, an example of a method for manufacturing the stove 1 from logs will be explained.
First, prepare log slices of the required thickness and length.
In the center of the top of the log, use a drill to drill a hole the size of the chimney 2 up to the bottom of the combustion chamber 3.
Next, a drill that is thinner than the inner diameter of the chimney portion 2 is inserted diagonally from the crater 2a to cut the shape of the inner wall surface of the combustion chamber 3. By performing this work while gradually changing the position of the drill, the shape of the combustion chamber 3 is carved out.
Finally, the stove 1 is completed by opening the intake port 4 from the side with a drill. In addition, in the above-described manufacturing method, the shape of the combustion chamber 3 becomes a slightly rough shape, but this is preferable from the viewpoint of ease of ignition.
In addition, the manufacturing method is not limited to the above-described manufacturing method. For example, the combustion chamber 3 may be processed using a special cutter, or a lathe may be used to process the combustion chamber 3 with higher precision.

Here, preferred dimensions of each part of the stove 1 will be explained with reference to FIG. 2.
It is desirable that the inner diameter d1 of the chimney portion 2 is φ30 to 100 mm.
It is desirable that the maximum inner diameter d2 of the combustion chamber 3 is φ50 to 300 mm.
It is desirable that the outer diameter d3 of the stove 1 is φ150 to 500 mm.
It is desirable that the inner diameter d4 of the intake port 4 is φ20 to 80 mm.
The height (length) h1 of the chimney portion 2 is preferably 50 to 150 mm.
The height (length) h2 of the combustion chamber 3 is preferably 50 to 300 mm.
The height (length) h3 from the bottom of the combustion chamber 3 to the bottom of the stove 1 is preferably 50 to 700 mm.
The overall height (length) h4 of the stove 1 is preferably 200 to 800 mm.
It is desirable that the inclination angle θ of the inner wall surface of the combustion chamber 3 is 10 to 40 degrees.

In this embodiment, d1 = 55 mm, d2 = 120 mm, d3 = 350 mm, d4 = 30 mm, h1 = 150 mm, h2 = 100 mm, h3 = 150 mm, h4 = 400 mm, and θ = 20°. We confirmed that it is suitable for efficient operation.

FIG. 4 is a diagram illustrating the combustion state of the stove 1 of this embodiment. In FIG. 4, arrows indicate how flammable gas and flame advance during combustion.
To combust the stove 1, first, a commercially available igniter or the like is dropped into the combustion chamber 3 through the tinder 2a, and the igniter is ignited through the tinder 2a or the opening 4a to serve as a pilot flame. When the ignition agent ignites, the combustion gas warmed by the combustion of the ignition agent rises and reaches the chimney section 2, and rises within the chimney section 2, which has a narrow flow path, thereby increasing the rate of rise. Then, a so-called chimney effect occurs, and strong intake air is obtained from the intake port 4. Here, the chimney effect is an effect that, due to the length of the chimney, heat from the combustion chamber is sucked up to the top, thereby obtaining strong intake air and promoting combustion.
Further, due to the chimney effect, the flame of the pilot flame (ignition agent) rises to the upper part of the chimney portion 2 leading to the crater 2a. In order for combustion to continue, intake air (oxygen) is required, and the air is sucked in from the intake port 4 provided at the bottom, and the resulting wind force burns the fuel, that is, the ignition agent, and mainly the inner wall surface of the combustion chamber 3. promote.

Furthermore, the fast-flowing air (wind) that is automatically sucked in from the intake port 4 is ejected from the bottom corner of the truncated cone and hits the inner wall surface of the combustion chamber 3, causing flames to inevitably rise upward while rotating. go. As a result, the inner wall of the combustion chamber 3 is thoroughly licked, the interior is stirred, the combustible gas is burned, and the combustible gas is vigorously discharged from the upper crater 2a, so that close to complete combustion with less smoke can be achieved. Further, smoke (flammable gas) produced by the flame is generated, but the gas is converted into flame and released in the combustion chamber 3, which is wider than the chimney portion 2.

In addition, since the stove 1 is entirely made of wood, it has the advantage of being a fuel itself, and also has a heat insulating effect. In other words, since the material is wood, the chimney part 2 and the combustion chamber 3 are heated and accumulate heat, and the outside has insulation properties to trap heat and promote combustion, and even when burning, the outside keeps the temperature low. This heat insulation property further provides a so-called rocket stove effect. The rocket stove effect is known as an effect that maintains high temperatures due to heat storage in the chimney, obtains stronger air intake, and promotes combustion.

Due to the above-described actions, the stove 1 of this embodiment continues to burn for 2 to 5 hours. Incidentally, the burning time is influenced by the density difference depending on whether the wood is softwood or hardwood, and the moisture content of the log material.
As combustion in the stove 1 progresses, combustion also progresses on the inner wall of the chimney part 2, and the inner diameter of the chimney part 2 gradually expands. As the inner diameter of the chimney portion 2 increases, the chimney effect weakens and the force of intake air from the intake port 4 decreases. As a result, the initial strong combustion subsides, and gradually becomes a scorching flame or a charcoal-like state. Such a state is suitable for barbecue cooking and the like.
As the combustion progresses, the outside of the log eventually collapses and the log itself burns.

In order to improve the convenience when using the stove 1 for cooking, two additional members are prepared in this embodiment.
FIG. 5 is a diagram illustrating the trivet 10 and the windshield 20.
The trivet 10 is made of metal in a U-shape, and is driven into the top surface of the stove 1 so that a pot, iron plate, etc. can be placed on it.
The windshield 20 is made of metal and has a cylindrical shape, and is provided with a large number of small holes around the periphery. By placing the windshield 20 on the top surface of the stove 1, the windshield 20 prevents the heat from reaching cooking utensils such as pots due to the wind blowing outdoors, and allows the flame to hit the cooking utensils without leaking, thereby efficiently transmitting the firepower. be able to.
The trivet 10 and the windshield 20 are preferably made of stainless steel in view of corrosion resistance, but other metals may be used.

As explained above, according to the stove 1 of the present embodiment, the combustion chamber 3, which is wider than the chimney part 2, is provided below the chimney part 2, and the air intake port 4 is arranged at an appropriate position, so that ignition is facilitated. It is easy to use, has good combustion efficiency, and can provide a stove with strong firepower. That is, it is possible to significantly improve the difficulty of igniting the conventional Swedish torch, the amount of smoke caused by poor combustion efficiency, and the weak firepower.

(Second embodiment)
FIG. 6 shows a second embodiment of the stove 1 according to the invention.
The stove 1 of the second embodiment has the same configuration as the first embodiment except that the shape of the combustion chamber 3 is changed. Therefore, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals, and redundant explanations will be omitted as appropriate.
The combustion chamber 3 of the second embodiment has a substantially cylindrical shape, as shown in FIG.
Even if the combustion chamber 3 is formed into a substantially cylindrical shape in this way, ignition is easy, combustion efficiency is good, and a stove with strong heating power can be obtained as in the first embodiment.

(Third embodiment)
FIG. 7 shows a third embodiment of the stove 1 according to the invention.
The stove 1 of the third embodiment has the same configuration as the first embodiment except that the shape of the combustion chamber 3 is changed. Therefore, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals, and redundant explanations will be omitted as appropriate.
The combustion chamber 3 of the third embodiment has a substantially spherical shape, as shown in FIG.
Even if the combustion chamber 3 is formed into a substantially spherical shape in this way, it is possible to easily ignite the stove as in the first embodiment, the combustion efficiency is good, and the stove has a strong heating power.

(Fourth embodiment)
FIG. 8 is a diagram showing a fourth embodiment of the stove 1 according to the present invention.
The stove 1 of the fourth embodiment has the same configuration as the first embodiment, except that the lower side of the combustion chamber 3 is a separate member and the shape of the intake port 4 is changed. Therefore, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals, and redundant explanations will be omitted as appropriate.
The stove 1 of the fourth embodiment has a configuration in which two parts, an upper main body 1a and a lower main body 1b, are combined, with the part below the bottom of the combustion chamber 3 being a separate member. The upper main body 1a and the lower main body 1b are connected using, for example, metal fittings or the like.
The combustion chamber 3 of the fourth embodiment is provided in the upper main body 1a and is opened toward the lower main body 1b, so that the combustion chamber 3 can be processed more easily.
Further, the intake port 4 of the fourth embodiment is provided in the upper main body 1a, and is configured in the shape of a U-shaped groove that opens toward the lower main body 1b side. Thereby, the machining of the intake port 4 can be easily performed.
According to the fourth embodiment, by forming the upper main body 1a and the lower main body 1b as separate members, it is possible to process the combustion chamber 3 more easily and accurately.

(Fifth embodiment)
FIG. 9 is a diagram showing a fifth embodiment of the stove 1 according to the present invention.
The stove 1 of the fifth embodiment has a configuration in which the trivet 10 and the windshield 20, which were prepared as additional components in the stove 1 of the first embodiment, are used as one member. It has the same form as the embodiment. Therefore, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals, and redundant explanations will be omitted as appropriate.

In the stove 1 of the fifth embodiment, a trivet-combined windshield 30 is prepared as an additional member.
The trivet-combined windshield 30 is made of metal and has a cylindrical shape, and a large number of small holes 31 are provided around the circumference. Further, the lower end portion of the trivet-combined windshield 30 is provided with sharp protrusions 31 at a plurality of locations. As described above, the trivet and windshield 30 of the fifth embodiment has a trivet function and a windshield function in one member.
By inserting the protrusion 31 into the upper surface of the stove 1, the trivet-combined windshield 30 can stabilize its position even when cooking utensils are placed on the upper surface.
Further, the small hole 31 is provided so that even if the upper part of the trivet-combined windshield 30 is blocked by a cooking utensil, the flame can escape through the small hole 31.

As for the thickness of the material of the trivet-combined windshield 30, for example, when iron is used, the thickness is preferably about 2 mm, and when stainless steel is used, it may be 1 mm or less. Further, the outer diameter df1 is preferably φ100 to 200 mm, the height hf is preferably 50 to 200 mm, and the hole system of the small holes is preferably φ10 to 30 mm. Note that the material and dimensions of each part of the trivet-combined windshield 30 are not limited to the above examples, and may be appropriately selected depending on the specific usage form.
By using the trivet and windshield 30 of the fifth embodiment, there is no need to separately prepare a trivet and a windshield, which is convenient. Further, it is possible to provide a trivet-combined windshield 30 having the functions of a trivet and a windshield at a lower cost.

(Deformed form)
Various modifications and changes are possible without being limited to the embodiments described above, and these are also within the scope of the present invention.

(1) In each embodiment, the stove has been described using an example in which a log is used as a material. However, the present invention is not limited to this, and the stove may be manufactured by, for example, solidifying and molding rice husks, sawdust, chips, etc.

(2) In each embodiment, the chimney portion and the combustion chamber have been described as being in the shape of a rotating body having the same center. However, as mentioned above, depending on the manufacturing method, it is difficult to produce an accurate rotating body shape, and as long as the shape can have substantially the same effect as a rotating body, various shapes can be used. can do. For example, the chimney and combustion chamber may have an octagonal or hexagonal cross-sectional shape, as long as a space is provided in which the flammable gas and flame can rotate within the combustion chamber.

(3) In each embodiment, the shapes of the combustion chambers have been described by exemplifying a truncated conical shape, a cylindrical shape, and a spherical shape. The shape of the combustion chamber is not limited to these, and the shape of the combustion chamber may be changed as appropriate.

In addition, although each embodiment and modification can also be used in combination suitably, detailed description is abbreviate|omitted. Furthermore, the present invention is not limited to the embodiments described above.

1 Stove 1a Upper main body 1b Lower main body 2 Chimney part 2a Crater 3 Combustion chamber 4 Inlet port 4a Opening 10 Trivet 20 Windshield 30 Trivet dual-use windshield

Claims (9)

A chimney part that extends linearly in the vertical direction,
a combustion chamber that communicates with the lower part of the chimney, and at least the lower part of the space is wider than the chimney;
an intake port that communicates with the combustion chamber from the outside and opens to the side;
Equipped with
The intake port extends linearly toward a position offset from the center of the combustion chamber,
A stove, wherein at least members constituting the chimney portion and the combustion chamber are made of a combustible material. A chimney part that extends linearly in the vertical direction,
a combustion chamber that communicates with the lower part of the chimney, and at least the lower part of the space is wider than the chimney;
an intake port that communicates with the combustion chamber from the outside and opens to the side;
Equipped with
The chimney part and the combustion chamber are configured in the shape of a rotating body centered on the center position of the chimney part,
A stove, wherein at least members constituting the chimney portion and the combustion chamber are made of a combustible material. In the stove according to claim 1 or claim 2,
The intake port extends in a direction along an inner wall of the combustion chamber in a transparent state when the stove is viewed from above;
A stove featuring In the stove according to any one of claims 1 to 3,
the intake port communicates with a lower end of the combustion chamber;
A stove featuring In the stove according to any one of claims 1 to 4 ,
The outer shape of the stove is approximately cylindrical, and the direction in which the center of the approximately cylindrical shape extends and the direction in which the chimney portion extends,
A stove featuring The stove according to any one of claims 1 to 5 ,
The stove shall be constructed entirely of logs;
A stove featuring The stove according to any one of claims 1 to 6 ,
The upper end surface is configured to be substantially flat,
comprising a windshield disposed on the upper end surface surrounding the periphery of the crater at the upper end of the chimney part;
A stove featuring The stove according to any one of claims 1 to 7 ,
The upper end surface is configured to be substantially flat,
comprising a trivet on which cooking utensils can be placed at a predetermined distance from the crater at the upper end of the chimney;
A stove featuring The stove according to any one of claims 1 to 6 ,
The upper end surface is configured to be substantially flat,
A trivet-combined windshield is provided on the upper end surface surrounding the periphery of the crater at the upper end of the chimney, and allows a cooking utensil to be placed at a predetermined distance from the crater at the upper end of the chimney.
A stove featuring

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