JP7241399B2 - portable combustion equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a portable combustion apparatus, and more particularly to a portable stove capable of using biomass materials such as wood chips.

2. Description of the Related Art As a combustion device used for outdoor cooking and simple heating, a combustion device having a combustion section inside is known (for example, Patent Document 1).
Patent Literature 1 discloses a configuration including a basket-shaped combustion section, a combustion section main body made of a heat insulating material in which the combustion section is arranged, and an external case section. Separately from this configuration, a configuration is also disclosed in which an air blower for introducing outside air is provided not in the outer case but in the bottom and upper side portions of the main body of the combustion section.

The technology disclosed in Patent Document 1 provides gaps through which air flows between the outer surface of the combustion section and the inner surface of the main body of the combustion section, and between the outer surface of the main body of the combustion section and the inner surface of the outer case section, and air is taken into the latter gaps. The air is flowing through the gap of the former.
In the process of flowing along the vertical direction of the combustion section, the air taken into the latter gap enters through the numerous gaps that are present along the vertical direction of the basket-shaped combustion section and are capable of taking in air. It promotes complete combustion in the entire longitudinal direction of the combustion zone.
In addition, in a configuration in which a blower is provided, outside air is forcibly introduced into the gap between the main body of the combustion section and the combustion section by the blower so that the air can be supplied to the entire lengthwise area of the combustion section. The blower is driven on and off in accordance with the temperature of the combustion section to keep the combustion temperature constant.

The ability to supply combustion air along the vertical direction of the combustion chamber enables stable combustion, making it possible to obtain a desired temperature when used as, for example, a heater.
However, when the configuration described in Patent Document 1 is used as a portable type, there are the following problems.

When carrying the combustion device, it is necessary to suppress the heat effect on the person carrying the device so as not to cause burns or the like.
The device described in Patent Document 1 requires a configuration in which a heat insulating material is placed on the outermost side or an outer case portion is arranged outside the heat insulating material. There is
In the configuration described in Patent Document 1, the entire vertical region of the combustion portion is burned. For this reason, the size of the heat insulating material is also required to match the area, so if the size is used to cover the side and bottom of the combustion section, the weight will be heavy, unlike the case where the heat is partially insulated.
Moreover, the use of a special member such as a heat insulating material may lead to an increase in cost.

As described above, the configuration described in Patent Document 1 only discloses a configuration mainly intended for stationary use, and does not bring about the ease of portability required for a portable stove, the safety during portability, or an increase in cost. It is difficult to expect to do so.

Japanese Patent No. 6023459

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable combustion apparatus that is easy to carry and that can suppress cost increases caused by using special materials.

In order to solve this problem, the present invention provides a gap between the outer wall of the combustion section containing the woody biomass material and the inner wall of the support section that supports the combustion section, and this gap is used to prevent air from blowing from the blower member. In addition to being used as an air passage, a gap is also provided between the outer wall of the support section that supports the combustion section and the inner wall of the case section that supports the support section. It is characterized in that it is used as a passage for air to escape from the lower part of the case to the outer periphery near the upper surface of the support part.

According to the present invention, an air passage to the combustion portion is secured within the support portion, and an air passage is secured between the support portion and the case portion outside the support portion. A heat shield layer using air is formed between In particular, the flow of air in this passage makes it possible to use the heat removal effect of the new air flow, apart from the heat insulation of the air pool. As a result, the heat of the combustion part is less likely to be transmitted to the case part, so it is possible to ensure safety when carrying it, and the cost increase can be suppressed by eliminating the need for heat insulating materials, etc., making it easier to carry. is obtained.

1 is an external view of a portable combustion device according to an embodiment of the present invention; FIG. 2 is a schematic end view of the portable combustion device shown in FIG. 1; FIG. In FIG. 2, it is an arrow directional view of the direction shown by arrow (3). FIG. 3 is a view of the support portion 6 and the heat shield member 8 in the direction indicated by the arrow (4) in FIG. 2 . FIG. 2 is a schematic end view for explaining the operational state of the portable combustion apparatus shown in FIG. 1; FIG. 2 is a schematic end view for explaining the operation of the portable combustion device shown in FIG. 1;

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated.
As shown in FIG. 1, a portable combustion device 1 according to an embodiment of the present invention has a prismatic case portion 2 .
The case portion 2 includes leg portions 2A provided at the four corner portions of the lower portion, and grip portions 2B provided on both sides in the vicinity of the middle position in the height direction. The leg portion 2A is a portion for standing the case portion 2 upright, and the handle portion 2B is used as a portion to be gripped when carrying the portable combustion apparatus 1. As shown in FIG.

A housing portion 2C for the cord L is provided on a part of the side surface of the case portion 2. As shown in FIG.
Cord L is a power cord for fan 3 (see FIG. 2) used as a blower for introducing outside air necessary for combustion, and has a USB terminal UT as shown in FIG. 1 or a power plug (not shown) at its end. is connected to
The storage portion 2C has a lid 2C1 that can be opened and closed, and is closed when the cord L is stored to prevent dust.

The upper surface of the case portion 2 is open, and a lid member 4 is provided above the surface with a gap G1 provided therebetween.
The cover member 4 is provided so as to be integrated with the case portion 2 using a bracket 4</b>A arranged inside the upper portion of the case portion 2 .
The lid member 4 is a member that can use the gap G1 formed between the lid member 4 and the upper portion of the case portion 2 as a space through which outside air can enter and exit.
The case portion 2 is provided with a structure in which various members including the lid member 4 are combined as shown in FIG.

In FIG. 2, inside the case part 2, with the center of the cross section as a reference, a bottomed cylindrical combustion part 5 is arranged on the innermost side with respect to the center, a support part 6 on the outer side, and a combustion part 6 on the outermost side. is provided with the case portion 2 described above.
The combustion unit 5 has a space capable of accommodating woody biomass materials such as woody pellets used as fuel.
A flange 5A is formed on the upper surface of the combustion portion 5. As shown in FIG. The flange portion 5A is used to suspend and support the combustion portion 5 by being mounted on the surface of the concave portion formed in the central portion of the lid member 4 .
A nut 5B is fixed to the flange portion 5A of the combustion portion 5 at a relative position on the upper surface in FIG. A rod-shaped member or an L-shaped member can be inserted into the through hole of the nut 5B, so as shown in FIG. can be avoided.

The combustion section 5 is provided with a plurality of holes 5C1 and 5C2 used as air intake sections near the upper and lower surfaces of the peripheral wall. Both the holes 5C1 and 5C2 have the function of taking outside air into the combustion section, but the holes 5C2 on the lower surface side are provided in multiple rows for the purpose of suppressing incomplete combustion and can take in a large amount of outside air. The outside air taken in from these multiple rows of holes 5C2 can send unburned gas generated when incomplete combustion occurs into the woody biomass material deposited inside the combustion section 5. Consideration is given to the number and size so that the quantity can be obtained.
Oxygen necessary for burning the woody biomass material can be introduced from above and below the combustion section 5 using the holes 5C1 and 5C2 provided in the upper and lower portions of the combustion section 5, so that the woody biomass material can be completely burned in the combustion section 5. It is possible to

The support portion 6 is a cylindrical member with an open top and bottom.
The support portion 6 is a member that removably supports the combustion portion 5 suspended from the lid member 4 integrated with the case portion 2 .
The support portion 6 has an inner diameter capable of forming a gap G2 between its inner surface and the outer surface of the combustion portion 5 inserted inside itself, and an outer diameter capable of forming a gap G5 between the inner surface of the case portion 2. have. Thus, a passage through which air can flow is formed between the inner surface of the support portion 6 and the outer surface of the combustion portion 5 .
On the other hand, the upper surface of the support portion 6 reaches the lower surface of the lid member 4 and abuts against the surface of the lid member 4 to be sealed.
Since the upper surface of the support portion 6 is sealed by the cover member 4, the outside air flowing through the passage formed by the gap G2 is forced to flow toward the hole 5C1 located above the combustion portion 5.

A blower support member 7 is provided on the inner side of the support portion 6 , that is, on the lower portion of the support portion 6 .
The blower support member 7 is a member that supports the fan 3 used as a blower.
The blower support member 7 is fixed to the lower surface of the support portion 6 with screws so as to maintain a state in which a gap G3 is provided between the outer surface of the support member 7 and the inner surface of the case portion 2 .
FIG. 3 is a view of the blower support member 7 as viewed from the lower surface side of the support portion 6. As shown in FIG. As shown in the figure, the fan support member 7 is a disk member following the shape of the support portion 6, and has ventilation holes 7A for allowing ventilation from the fan 3 and ribs formed at several locations on the outer periphery. It has 7B. The rib 7B is a portion fastened to the case portion 2 while a gap G3 is secured with respect to the case portion 2. As shown in FIG.
When the ribs 7B are fastened to the case portion 2, the blower support member 7 is disc-shaped with respect to the rectangular cross-sectional shape of the case portion 2. A space S1 through which air can flow is formed between the case portion 2 and the case portion 2 .

On the other hand, as shown in FIG. 2, in the vertical direction of the support portion 6, a heat shield member is arranged below the combustion portion 5 with a gap G4 between it and the inner surface of the support portion 6. 8 is provided.
As shown in FIG. 4, the heat shield member 8 is a plate-like member that follows the shape of the support portion 6, and has a gap G4 between the inner surface of the support portion 6 and the inner surface of the support portion 6 at equally divided positions along the circumferential direction. A rib 8A is formed to maintain the position. The rib 8A is positioned so as to maintain the gap G4 according to the advance/retreat amount of the screw.
The heat shield member 8 is arranged between the combustion section 5 and the blower support member 7 and has a function of shielding the heat of the combustion section 5 from reaching the fan 3 . Moreover, since the gap G<b>4 is formed while shielding heat, the outside air introduced by the fan 3 can be sent out toward the combustion section 5 .

The portable combustion device 1 having the above members can be carried by gripping the handle portion 2B of the case portion 2 . When cooking or the like is performed, the flange portion 5A of the combustion portion 5 is mounted in the concave portion of the lid member 4, thereby suspending the combustion portion 5 while being inserted into the support portion 6. As shown in FIG.
When igniting the woody biomass material, the cord L attached to the case part 2 is connected to an external power source such as a mobile battery or an outlet to start the fan 3 .

When the fan 3 is started, the outside air passes through the fan 3, passes through the passage formed by the gap G4 between the heat shield member 8 and the support portion 6, and flows between the combustion portion 5 and the support portion 6. are fed into the holes 5C1 and 5C2 of the combustion section 5 from the passage formed by the gap G2. This phenomenon is caused by the fact that the upper surface of the support portion 6 is abutted against the cover member 4 and the upper part of the passage is sealed, so that the air sent from the fan 3 tends to enter the holes 5C1 and 5C2. .
The flow of outside air introduced by the fan 3 is as indicated by arrows F1 to F6 in FIG.
By forming a passage through which air flows between the combustion portion 5 and the support portion 6, the passage functions as a heat insulating layer. As a result, heat transfer to the support portion 6 is reduced.

On the other hand, a passage similar to the passage between the combustion portion 5 and the support portion 6 is also formed between the inner surface of the case portion 2 and the outer surface of the support portion 6 by forming a gap G5.
Moreover, the inside of this passage communicates with the outside at the upper and lower surfaces in the vertical direction. That is, the upper surface communicates with the outside through a gap G1 provided between the cover member 4 and the lower surface communicates with the outside through a gap G3 provided between the outer periphery of the fan support member 7. there is
As a result, apart from the air blown by the fan 3, a space is formed between the inside of the case portion 2 and the outer wall surface of the support portion 6, through which outside air can freely flow in and out.
As a result, the gap G5 is used as a passage for outside air that enters from the lower portion of the case portion 2 and escapes from the vicinity of the upper surface of the support portion 6 to the outer periphery.
The flow of outside air in the passage formed by the gap G5 is indicated by arrows FO1 to FO5.

The heat in the passage is exhausted by heat insulation when the outside air is stagnant in the passage, and by replacement of fresh air when the outside air flows freely.
As a result, the surface of the case portion 2 maintains a state in which heat from the combustion portion 5 is difficult to be conducted, so that the handle portion 2B can be prevented from becoming hot during carrying.
In this embodiment, heat transfer to the case portion 2 can be suppressed by the flow and presence of air without providing a heat insulating layer, so the weight of the combustion device can be reduced compared to the case where a heat insulating layer is provided. As a result, it is possible to suppress the cost increase in the case of using a special member such as a heat insulating material, and to facilitate portability.

According to the present invention, since heat conduction to the case portion forming the outer shell can be suppressed when carrying, it is possible to eliminate the difficulty of carrying due to the heat of the outer shell member such as the case and the handle portion, and moreover, it is easy to carry. It also enables weight reduction. As a result, it has high usability in terms of ensuring convenience and safety as a combustion device for disasters and camping.

1 Portable Combustion Device 2 Case Part 3 Fan as Blower 4 Lid Member 5 Combustion Part 6 Supporting Part 7 Blower Supporting Member 8 Heat Shielding Member G1 to G5 Gap Forming Passage

Claims (7)

A portable combustion apparatus using woody biomass materials such as woody pellets as fuel,
a combustion section having a space capable of accommodating the woody biomass material and having an air intake;
a support part that supports the combustion part so that it can be pulled out and inserted inside;
an air blower that is arranged below the support portion and introduces outside air toward the combustion portion;
a case portion in which the support portion is arranged inside to be integrally supported, and which has a leg portion for standing upright and a handle portion for carrying;
Between the inner surface of the support section and the outer surface of the combustion section, an air passage from the blower is provided, and between the inner surface of the case section and the outer surface of the support section, a lower portion of the case section is provided. A portable combustion apparatus, characterized in that passages for outside air entering from the upper surface of the support portion and exiting from the vicinity of the upper surface of the support portion to the outer periphery are provided. The portable combustion device of claim 1,
A portable combustion apparatus, wherein a cover member is provided on the upper part of the case part, and the cover member is provided in a state in which a gap can be formed between the cover member and the upper surface of the case part. The portable combustion device according to claim 1 or 2,
A portable combustion apparatus, wherein a blower support member is provided inside the case portion with a gap between it and the inner surface of the case portion to support the blower. The portable combustion device according to any one of claims 1 to 3,
A plate-shaped heat shielding member is provided below the combustion portion inside the support portion arranged inside the case portion with a gap provided between it and the inner surface of the support portion. A portable combustion device characterized by: The portable combustion device according to any one of claims 1 to 4,
A portable combustion apparatus, wherein the combustion section is provided with a plurality of air intake sections in the vicinity of the upper surface and the lower surface. A portable combustion device according to any one of claims 1 to 5,
A gap is formed between the outer surface of the combustion portion and the inner surface of the support portion and between the outer surface of the support portion and the inner surface of the case portion. The gap formed between the inner surface and the inner surface is used as a passage for the air from the blower, and the gap formed between the outer surface of the support portion and the inner surface of the case portion is used for the air from the blower. Separately from the above, the portable combustion device is used as a passage for air entering from the lower part of the case part and exiting from the vicinity of the upper surface of the support part to the outer periphery. A portable combustion device according to any one of claims 2 to 6,
A portable type characterized in that a lid member provided on the upper part of the case part is provided so that a gap formed between the upper part of the case part and the upper part of the case part is used as a space that allows outside air to enter and exit. Combustion device.

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