Solid fuel stove

Abstract

The challenge was to achieve complete combustion in the stove's combustion chamber while also improving the heat retention capacity of the sauna stones. [Solution] The combustion chamber 1 of the sealed stove is cylindrical in shape, formed by a furnace wall plate 2 and an outer wall plate 4 that is parallel to it with a predetermined space between them. A fuel inlet 12 is provided on one side of the combustion chamber, and a grate 60 on which solid fuel is placed and an ash receiving tray 61 for receiving combustion ash are arranged from the fuel inlet 12. The combustion chamber is also composed of an air intake 30 that supplies secondary air from the grate 60 to a predetermined height, a heating plate 7 that is arranged from the air intake 1 at a predetermined height in the combustion chamber 1 to cover the upper part of the combustion chamber, a flow path duct 74 which is formed by providing multiple partition spaces on the upper surface of the heating plate 7 and creating a folded flow path from an inlet opened in a part of the heating plate 7 to the upper layer, and a chimney attachment part 73 for chimney connection formed at the end of the flow path of the flow path duct 74.

Description

Technical Field

[0001] The invention according to the present application (hereinafter referred to as "the present invention") relates to a solid fuel stove for heating a small space such as a tent or a hut to a high temperature for a sauna bath.

Background Art

[0002] In recent years, due to the improvement of health awareness in harmony with the natural environment, so-called outdoor activities have become active. As part of this, it has become a new trend to use tents or bungalows installed outdoors as sauna spaces.

[0003] Conventional heating devices for fixed sauna rooms mainly introduce a heating flow by installing a combustion furnace for heating outside the sauna room, as provided in, for example, Patent Document 1. In addition, Patent Document 2 also proposes a stove that enables transportation and movement for using a tent or a hut set up outdoors as a sauna space. Furthermore, Patent Document 3 also provides a combustion device aimed at compactness and combustion efficiency.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The heating device disclosed in Patent Document 1 above has a configuration in which the combustion furnace is placed outdoors or inside the sauna, and the exhaust heat is exchanged with a heat radiating vessel and radiated into the sauna room. Therefore, it is necessary to construct the equipment, which presents problems in terms of simplicity and portability.

[0006] Furthermore, the stove disclosed in Patent Document 2 is for tent saunas, and its purpose of use is the same as the invention proposed in this application. However, this invention focuses on adjusting the heating of the stones placed on the stove top plate and the heating of the side and bottom walls, and does not include a secondary combustion furnace with combustion efficiency in mind.

[0007] Furthermore, the combustion apparatus disclosed in Patent Document 3 above has a secondary combustion furnace by partitioning a part of the combustion furnace to improve combustion efficiency, but at the same time, in order to achieve compactness, although there is a space for secondary combustion, complete combustion is not guaranteed. In particular, when creating a heated atmosphere in a small space, it is a matter of human life, so ensuring more complete combustion is a challenge.

[0008] This invention was created with the aim of solving the above-mentioned problems, and provides a solid combustion stove that achieves complete combustion by supplying secondary air to the combustion chamber of the stove, and also enhances the heat retention capacity of the stones suitable for sauna bathing. [Means for solving the problem]

[0009] To solve the above problems, the present invention is configured as follows.

[0010] In other words, a sealed stove having a combustion furnace, the combustion furnace is cylindrical in shape with a rectangular furnace wall plate and an outer wall plate arranged around its outer perimeter parallel to the furnace wall plate with a predetermined space between them, a fuel inlet for loading solid fuel is provided on one side of the combustion furnace, and the hearth portion of the combustion furnace has a grate on which solid fuel from the fuel inlet is placed and an ash tray below it for receiving combustion ash, above the grate there is an air intake port that communicates with the space below the grate and supplies secondary air from the grate to a predetermined height, a heating plate arranged from the air intake port to a predetermined height in the combustion furnace so as to cover the upper part of the combustion furnace, a flow path duct formed by providing multiple partition spaces on the upper surface of the heating plate and creating a folded flow path from an inlet opened in a part of the heating plate to the upper layer through the partition spaces, and a chimney attachment part for chimney connection formed at the end of the flow path of the flow path duct. The fuel inlet is comprised of an airtight opening and closing door.

[0011] The combustion furnace is a vertically elongated cylindrical body and a polygonal rectangular body, but it may also be a pentagonal or hexagonal rectangular body. Preferably, a rectangular cylindrical shape consisting of four faces—front, back, and left and right sides—is a preferred choice considering the manufacturing process.

[0012] Furthermore, while the sauna stones may be placed on the top surface of the combustion furnace, a recessed stone placement area is formed at a predetermined lower position from the upper edge of the combustion furnace, in contact with the furnace wall plate, the heating plate, and the flow path duct.

[0013] Furthermore, the upper end opening of the space between the furnace wall plate and the outer wall plate is closed with a cover plate having multiple discharge ports formed thereon, and outer casing plates are arranged opposite the outer wall plate with a predetermined spacing between them. [Effects of the Invention]

[0014] According to the present invention, secondary air is supplied to the upper region of the grate, a heating plate is disposed so as to cover the upper cross section of the combustion furnace, and a flow path duct having a folded-back flow path formed on its upper surface is arranged, so that the draft can be activated and more complete combustion can be achieved. In addition, since a stone placement portion that contacts the heating plate, the periphery of the flow path duct, and the furnace wall plate is provided, the heat storage property of the stone can be enhanced.

[0015] Furthermore, since the furnace wall plate and the outer wall plate are disposed facing each other to form a separation space, the air in the space is heated by the furnace wall plate and discharged from the upper end, so that the interior of the room can be made hotter.

Brief Description of the Drawings

[0016] [Figure 1] It is a perspective view showing the appearance of the solid fuel stove according to this embodiment. [Figure 2] It is a longitudinal sectional view taken along the line A-A of FIG. 1. [Figure 3] It is a longitudinal sectional view taken along the line B-B of FIG. 1. [Figure 4] It is a longitudinal sectional perspective view taken along the line B-B of FIG. 1. [Figure 5] It is a cross-sectional view showing the floor portion side taken along the line C-C of FIG. 2. [Figure 6] It is a cross-sectional perspective view showing the floor portion side taken along the line C-C of FIG. 2.

Modes for Carrying Out the Invention

[0017] Next, an example of the solid fuel stove and its combustion structure according to the present invention (hereinafter referred to as "this example") will be described with reference to the drawings. In the perspective view of FIG. 1, with the fuel inlet door side (left side of the drawing) as the front, the positional relationship is specified with respect to the left and right, up and down as viewed from the front, and the opposite surface of the front as the back, and the following description will be given.

[0018] FIG. 1 is a perspective view showing the overall solid fuel stove according to this embodiment. FIG. 2 is a longitudinal sectional view taken along line A-A from the center of the front to the back of the stove. <A. Structure of Combustion Furnace>

[0019] The solid fuel stove forms a vertically long rectangular cylindrical body with a combustion furnace 1 for burning solid fuel f by using four metal furnace wall plates 2 on the front, back, and left and right sides, and four metal outer wall plates 4 that are parallel and facing the outer surfaces of each furnace wall plate 2 at a predetermined interval. These four outer wall plates 4 are composed of a front outer wall plate 40, a rear outer wall plate 41, and side outer wall plates 42 on the left and right sides, and the corners where the edges of adjacent outer wall plates 4 are butted together are formed in a rounded shape in top view.

[0020] Also, on the floor part 6 on the bottom side of the combustion furnace 1, an ash receiving tray 61 described later and a base plate 63 that serves as a floor installation part are arranged below it. Adjustable legs 64 are attached to the four corners of the lower surface of the base plate 63. Also, a substantially square-shaped cover plate 50 is attached to close the upper end opening of the facing space 5 between each furnace wall plate 2 and each outer wall plate 4, and a plurality of discharge ports 51 are formed to surround the furnace wall plate 2. With the above structure, the air in the facing space between each furnace wall plate 2 and each outer wall plate 4 is heated by contacting the furnace wall plate 2 and becomes an upward airflow, and is discharged from the plurality of discharge ports 51.

[0021] With such a structure, the cover plate 50 functions to maintain the facing space between each furnace wall plate 2 and each outer wall plate 4 and increase the shape-retaining strength of the combustion furnace 1. Furthermore, the air in the facing space is heated by contacting the furnace wall plate 2, becomes an upward airflow, and can be effectively discharged from the plurality of discharge ports 51 due to the nozzle effect. <B. Combustion Ash>

[0022] On the hearth portion 6 of the combustion furnace 1, a fire grate 60 for placing solid fuels f such as firewood, charcoal, and sawdust briquettes is provided. Below this fire grate 60, an ash receiving tray 61 for receiving the falling combustion ash is arranged, and this ash receiving tray 61 is of a pull-out type to the outside from the lower position of the fuel inlet 12 described later. <C. Input of Solid Combustion>

[0023] On the front side of the combustion furnace 1, a fuel inlet 12 is opened through the front furnace wall plate 2 and the front outer wall plate 40. An opening and closing door 14 with a transparent refractory glass 13 attached to the central portion of the front surface is attached to the fuel inlet 12. This opening and closing door 14 is attached with a hinge to the left front edge portion to enable opening and closing in the horizontal direction, and a lock handle 15 for maintaining airtightness when closed is attached to the right edge portion.

[0024] Note that the opening and closing method of this opening and closing door 14 is not limited to the method of this embodiment, and it may also be a detachable type, a sliding type, or an up and down opening and closing type, etc. In addition to the above-mentioned pull-out type, an appropriate method such as a scraping method or a falling method by opening the base plate 63 can be selected for the discharge of combustion ash. <D. Primary Combustion Region and Secondary Combustion Region>

[0025] Although the combustion furnace 1 according to the present invention is not a physically divided region, it is divided into a primary combustion region 10 and a secondary combustion region 11. This will be described below.

[0026] From the peripheral edge portion of the fire grate 60, inclined furnace wall plates 3 made of metal plates inclined outward toward the left and right side furnace wall plates 22 and the rear furnace wall plate 21 are provided respectively. The region surrounded by these three inclined furnace wall plates 3 is defined as the primary combustion region 10.

[0027] Near the upper end portion of each of the three inclined furnace wall plates 3, a plurality of air supply ports 30 are provided on the back side so as to surround the primary combustion region 10. This air supply port 30 communicates with a ventilation port 62 formed in the region below the ash receiving tray 61 in the hearth portion 6.

[0028] With such a configuration, the secondary air flowing in from the vent 62 passes through the back side of the inclined furnace wall plate 3 and supplies the secondary air from the air supply port 30 to the vicinity of the upper end of the inclined furnace wall plate 3, that is, to the secondary combustion region 11 located above the primary combustion region 10, aiming for more complete combustion. <F. Heating Plate and Duct>

[0029] Also, a heating plate 7 is disposed at a position having a predetermined height from the primary combustion region 10. This heating plate 7 crosses the combustion furnace 1 at a predetermined height position from the upper end of the inclined furnace wall plate 3 and abuts against each furnace wall plate 2. And, a part near the contact with the rear furnace wall plate 21 is provided with an inlet 70 through which the combustion flow in the secondary combustion region 11 circulates. On the upper surface of this heating plate 7, a partition plate 71 is disposed horizontally toward the front with a predetermined height position from the rear furnace wall plate 2. Further, a circulation port 72 communicating with the upper surface is formed near the front end side of this partition plate 71, and a chimney attachment portion 73 for connecting a chimney to a predetermined height position of the partition plate 71 closer to the rear is formed here.

[0030] In other words, from the heating plate 7 and the inlet 70 formed on the back side, it moves to the back side of the upper surface of the partition plate 71 through the circulation port 72 disposed on the front side of the heating plate 7. And, a rectangular pipe connected to the chimney attachment portion 73 formed thereon is folded back to form a flow path duct 74 in a state of being stacked on the upper side. That is, this flow path duct 74 is configured by arranging partition spaces partitioned by partition plates 71 arranged in parallel with a predetermined interval on the upper surface of the heating plate 7 in a layered manner in the vertical direction. In the process of the combustion gas moving from the inlet 70 to the chimney attachment portion 73 within this partition space, more complete combustion can be achieved.

[0031] In this embodiment, as shown in FIG. 2, it is a single round trip from the back to the front and then back to the back, but it may also be a flow path duct having a two-round trip configuration with the partition plates 71 arranged in a two-layer stack. <G. Stone Placement>

[0032] A stone placement portion 8 is formed around the flow path duct 74. The stone placement portion 8 is formed in a recessed shape that descends from the top surface of the combustion furnace 1 surrounded by the furnace wall plate 2 and is in surface contact with the upper surface of the heating plate 7 and the flow path duct 74. Appropriate-shaped sauna stones s (e.g., volcanic rock, diatomite, talcoclite, ceramic stone, etc.) are stacked in this recessed space.

[0033] With such a configuration, the stones are heated by contact with the heating plate 7, the flow path duct 74, and the furnace wall plate 2, and will emit radiant heat into the sauna room over a long period of time. Also, even if the conductive heat from the combustion furnace 1 weakens, since the stone placement portion 8 is in a recessed shape, it is possible to effectively retain the heat storage energy. can be achieved. <H. Outer panel>

[0034] Furthermore, an outer panel 9 is disposed around the outer periphery of each outer wall plate 4 disposed so as to surround and be separated from each of the above-described furnace wall plates 2. This outer panel 9 is disposed in a standing state with a spaced-apart facing relationship on a part of both front sides, both left and right side surfaces, and the back side of the outer wall plate 4.

[0035] By installing this outer panel 9, direct contact with the high-temperature part in the sauna room can be prevented, and the risk of burns can be significantly reduced. In particular, an effect of preventing accidents due to inadvertent contact in a narrow space can be expected.

Explanation of symbols

[0036] O Solid fuel stove 1 Combustion furnace 10 Primary combustion region 11 Secondary combustion region 12 Fuel inlet 13 Refractory glass 14 Opening / closing door 15 Lock handle 2 Furnace wall plate 20 Front furnace wall plate 21 Rear furnace wall plate 22 Side furnace wall plate 3 Inclined furnace wall plate 30 Air supply port 4 Exterior wall board 40 Front exterior wall board 41 Rear exterior wall board 42 Side wall panel 5 Face-to-face space 50 Lid plate 51 Outlet 6 Roadbed section 60 Fire grates 61 Ash tray 62 Ventilation holes 63 Basal plate 64 Legs 7 Heating plate 70 Inlet 71 Partition Plate 72 Distribution port 73 Chimney mounting section 74 Flow duct 8 Stone placement section 9 Outer plate f. Solid combustion material (firewood) S Stone

Claims

1. A sealed stove having a combustion chamber, The combustion furnace has a cylindrical shape, with a rectangular furnace wall plate and outer wall plates arranged around its outer perimeter parallel to the furnace wall plate with a predetermined space between them. The combustion furnace is provided with a fuel inlet on one side for loading solid fuel, and the hearth of the combustion furnace is provided with a grate on which the solid fuel from the fuel inlet is placed, and below it, an ash tray for receiving combustion ash. Above the grate, there is an air intake that communicates with the space below the grate and supplies secondary air from the grate to a predetermined height position, A heating plate is installed at a predetermined height position in the combustion furnace, from the air intake port, so as to cover the upper part inside the combustion furnace, The heating plate has multiple partition spaces on its upper surface, and the partition spaces are arranged in a flow path duct that folds back upwards from an inlet opened in a part of the heating plate. A chimney attachment portion for chimney connection is formed on the terminal side of the flow path of the flow path duct, A solid fuel stove characterized by being composed of [the specified material].

2. The solid combustion stove according to claim 1, characterized in that the fuel input port is configured with an airtight opening and closing door.

3. The solid fuel stove according to claim 1, characterized in that the combustion furnace is formed in the shape of a rectangular cylindrical body consisting of four surfaces: the front, back, and left and right sides.

4. The solid fuel stove according to claim 1, characterized in that a recessed stone placement portion is formed at a predetermined lower position from the upper edge of the combustion furnace, in contact with the furnace wall plate, the heating plate, and the flow path duct.

5. The solid fuel stove according to claim 1, characterized in that the upper end opening of the space between the furnace wall plate and the outer wall plate is closed with a cover plate having a plurality of discharge ports formed thereon.

6. The solid fuel stove according to claim 1, characterized in that an outer casing plate is arranged opposite the outer wall plate with a predetermined spacing between them.

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