Portable, insulated wood stove

Abstract

To provide an assembly-type wood stove that is excellent in portability, storage, heat insulation, and practicality. [Solution] The collapsible wood stove of this invention has a rectangular parallelepiped metal housing as the main body 1, with a chimney 2 that can be stored inside when not in use. The housing has an insulating layer with a space or insulating material between the inner and outer walls to suppress heat conduction to the outside. The chimney has a cylindrical flue 2a in the center, the outer periphery of which is covered by a metal cover 2b with a square cross section and an insulating structure. A roughly X-shaped trivet 3 for supporting cooking utensils is integrally attached to the top of the chimney. A foldable handle is also provided on the top of the housing, making it portable when stored.

Description

[Technical Field]

[0001] This invention relates to a collapsible wood stove with a heat-insulating metal casing, a chimney that can be stored inside, and is easy to assemble and highly portable. [Background technology]

[0002] Traditionally, small rocket stoves have been built primarily by DIYers for outdoor cooking and heating, with examples of their construction published online. Some of these stoves use a metal storage box or similar structure, with the chimney, combustion chamber, trivet, and other components disassembled and stored inside, then removed and reassembled for use. However, these conventional structures often have a single-layer metal chimney, which can easily heat up during use, posing safety concerns compared to insulated chimneys. Furthermore, if the chimney is not insulated, the heat generated by combustion can easily escape to the outside, causing the temperature inside the chimney to drop, making it difficult to generate strong updrafts. This can sometimes hinder further improvements in combustion efficiency. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Pinterest: DIY rocket stove posted on image-sharing social networking site URL: https: / / jp.pinterest.com / pin / 643100021829642370 / (Last accessed: April 7, 2025) Summary of the Invention [Problem to be solved by the invention]

[0004] The purpose of this invention is to improve the safety and combustion efficiency of the chimney by incorporating an insulating structure into the chimney while utilizing the existing structure, taking into account the above-mentioned issues. Another objective of this invention is to provide a structure that improves the performance of the chimney without compromising convenience such as storage and portability. [Means for solving the problem]

[0005] The collapsible wood stove of this invention comprises a rectangular metal housing 1 and a chimney 2 that can be stored within the housing. An insulating layer 5, consisting of a space or insulating material, is formed between the inner and outer walls of the metal housing 1, reducing heat conduction to the outside. A foldable handle 4 is provided on the top surface of the housing 1, allowing it to be used upright when carried. The chimney 2 has a cylindrical flue 2a in its center, surrounded by an insulating cover 2b with a square cross section. A space or insulating material is provided between the insulating cover 2b and the flue 2a, creating an insulating structure. A trivet 3 for supporting cooking utensils is integrally attached to the top end of the chimney 2 in a roughly X-shape. [Effects of the Invention]

[0006] According to this invention, the chimney section employs a double-insulated structure, which suppresses heat radiation to the outside and reduces the risk of burns and other accidents due to accidental contact, improving safety during use. Furthermore, the improved insulation stabilizes the upward airflow inside the chimney, improving combustion efficiency. As a result, fuel waste and smoke generation are reduced. Furthermore, the chimney section and trivet are designed to fit compactly into a metal casing, achieving a highly portable and storable design. Furthermore, this invention conforms to a standard guide rail (e.g., 60 mm diameter), allowing direct connection to commercially available smoke exhaust chimneys. This allows for easy extension and refraction of the smoke exhaust path depending on the usage environment and installation conditions. This allows for proper smoke exhaust treatment when used as a heating appliance, further improving comfort and safety during use. As a result, a novel and convenient rocket stove is provided, based on the structure of conventional rocket stoves known in DIY projects, but with practical improvements. [Brief explanation of the drawings]

[0007] [Figure 1] Overall perspective view [Figure 2] Overall front cross-sectional view [Figure 3] Main body cross-sectional view [Figure 4] Overall side cross-sectional view [Figure 5] Perspective view when stored (with chimney stored) [Figure 6] Perspective view when stored (fully closed) [Figure 6A] Auxiliary drawing (handle standing) [Figure 7] Chimney perspective view [Figure 8] Exploded perspective view of the chimney [Figure 9] Side cross section of chimney [Figure 10] Chimney plan DETAILED DESCRIPTION OF THE INVENTION

[0008] One embodiment of the present invention will be described with reference to Figures 1 to 10. Figure 1 is an overall perspective view of the main body and chimney assembled for use, and Figures 2 to 4 show the cross-sectional structure of the main body. The metal housing 1 is rectangular, and an insulating layer 5 formed between the inner and outer walls of the housing reduces heat conduction to the outside. Figures 5 and 6 are perspective views of the chimney 2 stored in the housing 1, with Figure 6 showing the fully closed state. Figure 6A, an auxiliary view, shows the folding handle 4 on the top surface of the housing 1 in an upright position. Figure 7 is an overall perspective view of the chimney 2, which can be disassembled into the flue 2a and the insulating cover 2b as shown in Figure 8. A roughly X-shaped trivet 3 is integrally attached to the top end of the chimney 2. Figure 9 shows the side cross-sectional structure of the chimney 2, clearly showing the space or insulating material between the flue 2a and the insulating cover 2b. Figure 10 is a plan view of the chimney 2. [Example]

[0009] In an embodiment of the present invention, a chimney part 2 having a cylindrical flue part 2a and a heat insulating cover 2b is housed in a metal housing 1, and the chimney part 2 is placed on the top surface of the housing 1 when in use.

[0010] The chimney part 2 can be positioned and fixed by a guide frame provided on the housing, and cooking utensils are placed directly on the trivet 3 for use.

[0011] After use, the chimney part 2 and the trivet 3 attached integrally to the chimney part 2 can be stored and closed inside the housing 1, and the handle 4 can be raised to carry it. [Explanation of symbols]

[0012] 1 Metal case (main body) 2 Chimney section 2a Flue part (cylindrical) 2b Insulation cover (square cross section) 3 Trivet (support for cooking utensils) 4 Handles (foldable) 5. Insulation layer (enclosure air layer or insulation material) 6 Guide Frame

Claims

1. This is a prefabricated wood stove that includes a rectangular metal housing and a chimney that can be stored inside the housing. The chimney has a cylindrical flue in the center and is covered on the outside with a metal cover that has an insulating structure. Furthermore, a trivet for placing cooking utensils is attached to the top of the chimney, and a handle is provided on the top of the housing for easy carrying. In addition, this prefabricated wood stove is characterized by an insulating layer made of an air gap or insulating material between the inner and outer walls of the housing.

2. The metal cover of the collapsible wood stove described in claim 1 has a square cross section and is configured to suppress heat conduction to the outside by forming a space between it and the flue section or by interposing an insulating material therebetween.

3. In the collapsible wood stove described in claim 1 or 2, the lower end of the chimney section is provided with a structure for fitting into a guide frame provided on the upper part of the metal casing, allowing the chimney section to be accurately positioned and fixed on the casing.

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