JP2023177816A - Combustion gas straightener of stove and stove - Google Patents

Abstract

To provide a combustion gas straightener of a stove which causes a strong draft phenomenon in a combustion chamber and enables secondary combustion to be performed with high efficiency, and to provide a stove including the combustion gas straightener.SOLUTION: A combustion gas straightener 100 comprises: a first flow straightening part 110 including a first inflow port 214 for allowing a flame and a combustion gas generated in a primary combustion chamber 212 including an intake port 213 at the front of a stove body 210 to flow into a flue from a rear wall 212a side, and a first straightening plate 111 which allows the flame and the combustion gas to flow forward (a direction of an arrow a); and a second flow straightening part 120 including a second inflow port 215 for allowing the flame and the combustion gas which have passed through the first straightening part 110 to flow into a flue, and a second straightening plate 121 which allows the flame and the combustion gas to flow to the rear side of the primary combustion chamber 212 (a direction of an arrow b).SELECTED DRAWING: Figure 5

Description

The present invention relates to a rectifier that guides combustion gas to the exhaust port in a stove that uses wood biomass such as firewood, branches, and waste wood as fuel. The present invention relates to a combustion gas rectifying device that enables secondary combustion of gas, and a stove equipped with the same.

In recent years, combustion appliances called rocket stoves have been used in outdoor activities such as camping. A rocket stove is a stove that burns woody biomass fuel such as firewood, branches, and waste wood, and can obtain high heat through secondary combustion and draft phenomenon.

Various stoves with improved combustion efficiency have been proposed based on the combustion principle of rocket stoves. For example, a cylindrical combustor main body such as a pail can is provided with a first lid portion having a primary intake port and an exhaust port, and the inside of the combustion chamber is connected to the first lid portion into a first combustion chamber and a second combustion chamber. A first partition plate and a second partition plate are provided to divide the room into two compartments, and the first partition plate has a first ventilation port that communicates with the primary intake port, and the second partition plate has a first ventilation port that communicates with the exhaust port. There is a combustor that has a second vent opening (for example, see Patent Document 1). According to this, the first combustion route is transmitted from a part of the first combustion chamber via the first vent, and the second combustion route is routed from the other part of the first combustion chamber via the second vent. The structure from the exhaust port to the chimney ensures complete combustion of the fuel.

JP2018-132288A

When a rocket stove has a long chimney, the draft phenomenon is accelerated and the combustion efficiency is improved. However, if the chimney is set to be long, the device will become large, which may cause problems in transportation and installation.

In addition, the combustor described in Patent Document 1 adopts a structure in which outside air is sucked through the intake port of the lid provided in the combustor body, so the sucked air is directed downward toward the combustion chamber located below the combustor body. The combustion gases produced there are turned upward at the vent and flow upward toward the chimney above. In other words, the sucked outside air flows in the opposite direction to the upward airflow generated by combustion, which may reduce intake efficiency.

The present invention provides a stove that uses the combustion principle of a rocket stove, which generates a strong draft phenomenon and promotes secondary combustion to obtain high firepower, and which also enables the stove to be made compactly. An object of the present invention is to provide a combustion gas rectifying device and a stove equipped with the same.

The means taken by the present invention to solve the above problems is provided between an intake port provided in front of the primary combustion chamber and an exhaust port provided above, so that the gas generated in the primary combustion chamber is A combustion gas rectifier for a stove that guides flame and combustion gas to the exhaust port, the device comprising: a first rectifier; and a second rectifier disposed above the first rectifier; The section includes a first inlet through which flames and combustion gas rising from the combustion chamber flow in from a side opposite to the intake port, and a combustion chamber extending horizontally from the first inlet and into which combustion gas flows in from the first inlet. a first rectifier plate that causes gas to flow toward the intake port, and the second rectifier includes a second inlet that allows flame and combustion gas rising from the first rectifier to flow from the intake port side; It is characterized by comprising a second baffle plate that extends horizontally from the second inlet and causes the flame and combustion gas that have flowed in from the second inlet to flow toward the side opposite to the intake port. This is a combustion gas rectifier for a stove.

The combustion gas rectifying device (hereinafter simply referred to as the rectifying device for convenience) according to the present invention is configured to raise the flame and combustion gas generated in the primary combustion chamber while turning them in the horizontal direction. In other words, the flame and combustion gas flowing horizontally in the first rectifying section are turned around and flowing in the opposite direction in the second rectifying section located above, and the combustion gas in contact with the high-temperature primary combustion chamber is This allows for a longer flue. By doing so, the residence time of the combustion gas becomes longer, so that sufficient secondary combustion can be performed. In addition, a strong draft phenomenon occurs in the flue formed by the rectifier, which allows the stove chimney to be shortened. Furthermore, since the flue can be formed horizontally, intake resistance can be reduced.

Another means taken by the present invention to solve the above problem is a stove equipped with the above combustion gas rectification device.

By disposing the above-mentioned rectifier in the primary combustion chamber of the stove, a strong draft phenomenon can be obtained and the secondary combustion efficiency can also be improved, resulting in a stove with high heating power. Furthermore, since the flue is formed within the rectifier, a compact stove with a short chimney can be achieved.

According to the stove combustion gas rectifier and stove according to the present invention, the combustion gas generated in the primary combustion chamber is made to flow horizontally in the first rectifier, and then in the second rectifier in the opposite direction to the first rectifier. Since the flue is turned around to flow, the flue length of the combustion gas can be increased. As a result, the residence time of the combustion gas becomes longer, and sufficient secondary combustion occurs. As a result, high-temperature combustion becomes possible, and clean exhaust gas containing no incompletely combusted gas can be obtained. In addition, a strong draft phenomenon occurs in the primary combustion chamber due to the formed flue, so a compact stove with a short chimney length can be produced. Furthermore, since the flow of air from intake to exhaust is rectified in the horizontal direction, intake resistance can be reduced.

FIG. 1 is a perspective view of a stove including a combustion gas rectifier for a stove according to an example. FIG. 1 is a perspective view of a stove equipped with a combustion gas rectifier according to an embodiment, with a front panel removed. FIG. 2 is a perspective view of a combustion gas rectifier for a stove according to an embodiment. FIG. 1 is an exploded perspective view of a combustion gas rectifier for a stove according to an embodiment. FIG. 1 is a schematic side sectional view of a stove including a combustion gas rectification device for a stove according to an embodiment, and is a diagram illustrating the flow of combustion gas within the stove.

The present invention is a rectifying device that guides combustion gas generated in the primary combustion chamber of a stove to an exhaust port, and by forming the flue so as to fold back in the horizontal direction, a strong draft phenomenon can be obtained and a sufficient This is a combustion gas rectifier for a stove and a stove that can perform secondary combustion.

A stove equipped with a rectifier includes a primary combustion chamber in which an intake port is formed in the front and an exhaust port is formed in the upper part. The primary combustion chamber can be formed in a cylindrical or box shape, and for example, an opening can be formed in the top surface of a one-ton can and the can can be used by lying on its side.

The rectifier forms a flue for the combustion gas generated in the primary combustion chamber to reach the exhaust port, and includes a first rectifier section including a first inlet and a first rectifier plate, and a first rectifier. and a second rectifying section that is disposed above the section and includes a second inlet and a second rectifying plate. The first current plate and the second current plate can be made from a metal plate made of tin, stainless steel, aluminum alloy, etc., for example.

In the first flow straightening section, the first inlet is provided at one end side of the first flow straightening plate. Further, regarding the second flow straightening section, the second inlet is provided at the other end side of the second plate part, that is, at a position opposite to the first inlet. The first inlet and the second inlet can both be formed by cutting out the first plate part and the second plate part, or by drilling a hole, or by forming the first plate part and the second plate part. The plate parts are horizontally shifted so that a gap is formed between the plate part and the inner surface of the primary combustion chamber when placed in the primary combustion chamber, and this gap is used to connect the first inlet and the second inlet. It may also be an inlet.

Further, the first rectifying section and the second rectifying section may be manufactured as mutually independent members, but they may also be manufactured by integrating them. For example, the first plate part and the second plate part can be integrally formed by providing a plate-shaped or rod-shaped support part that connects both sides of the first plate part and the second plate part. By doing this, the handling and installation work of the current plate can be easily performed.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 and 2 show a stove 200 that includes a combustion gas rectifier 100 (hereinafter simply referred to as a rectifier 100 for convenience) according to an embodiment. Stove 200 includes a stove body 210, a front panel portion 220, and a chimney 230.

The stove main body 210 is formed by cutting off the upper surface of a can to form an opening 211, and laying it down so that the opening 211 faces the front. That is, the stove body 210 is formed into a box shape with an opening 211 at the front. A front panel 220 is provided in about the upper third of the opening 211 . The front panel 220 is formed by cutting and bending a stainless steel plate, and is detachably attached to the periphery of the opening 211 with screws. A window portion 221 is provided approximately at the center of the front panel 220 and is formed by attaching a glass plate to the opening.

The entire box-shaped interior of the stove body 210 is a primary combustion chamber 212, into which woody biomass fuel such as firewood or branches is charged and burned. A portion of the opening 211 below the front panel 220 is an intake port 213 that introduces outside air into the primary combustion chamber 212, and fuel is also introduced from here.

Further, an exhaust port (not shown) that communicates with the chimney 230 is bored in the upper surface of the stove body 210 near the corner 210a that is remote from the opening 211. The chimney 230 includes a base portion 231 and a cylindrical portion 232 that stands up from the base portion 231. The base portion 231 is detachably attached to the upper surface of the stove body 210 by screwing.

A plurality of screw holes 240 are bored in the left and right side surfaces 210b and 210c of the stove body 210 along the longitudinal direction. Then, a rectifying device 100, which will be described later, is screwed into a screw hole 240 with a screw 241 and disposed within the primary combustion chamber 212.

3 and 4, a rectifier 100 is shown. The rectifier 100 includes a first rectifier 110 and a second rectifier 120.

The first rectifier 110 includes a first rectifier plate 111 formed to have approximately the same width as the primary combustion chamber 212 and a length shorter than the depth of the primary combustion chamber 212; The first support plate 112 is provided vertically by bending the surplus portions provided on both sides by approximately 90 degrees. On the other hand, the second rectifying section 120 includes a second rectifying plate 121 formed to have approximately the same width and vertical width as the first rectifying plate 111, and a surplus portion provided on both left and right sides of the second rectifying plate 121. A second support plate 122 is provided, which is bent at 90 degrees and vertically provided. The rectifying device 100 is formed by combining the first rectifying section 110 on the bottom and the second rectifying section 120 on the top, with the two being spaced apart. That is, the second flow straightening section 120 is fitted inside the first flow straightening section 110, and the inner surface of the first support plate 112 and the outer surface of the second support plate 122 are brought into contact and fixed, thereby integrating the two. Note that in order to fix the second support plate 122 to the first support plate 112, means such as welding or screwing can be used.

Further, the second rectifier 120 is fixed at a position slid slightly rearward than the first rectifier 110. By doing so, when the rectifying device 100 is installed in the primary combustion chamber 212 of the stove 210, there is a gap between the first rectifying section 110 and the rear wall 212a of the primary combustion chamber 212, and between the second rectifying section 120 and the front panel 220. The gaps formed between the two can function as a first inlet 214 and a second inlet 215, which will be described later.

The fixed first support plate 112 and second support plate 122 correspond to the screw holes 240 provided in the left and right side surfaces 210b and 210c of the stove body 210 when the rectifier 100 is installed in the primary combustion chamber 212. Screw holes 113 and 123 are drilled therein. By screwing the screws 241 into the screw holes 240 and the screw holes 113 and 123, the rectifier 100 can be detachably installed in the primary combustion chamber 212.

FIG. 5 shows a cross section of the stove body 210 viewed from the side (AA cross section shown in FIG. 1). As shown in FIG. 5, when the rectifier 100 is disposed in the primary combustion chamber 212, the first rectifier 110 and the second rectifier 120 form a flue S1 and a flue S2 that extend in the depth direction. be done. That is, the flue S1 is formed between the first current plate 111 and the second current plate 121, and the flue S2 is formed between the second current plate 121 and the upper wall 212b of the primary combustion chamber 212. Ru. A first inlet 214 is formed between the rear end of the first baffle plate 111 and the rear wall 212a of the primary combustion chamber 212, and a second inlet port 214 is formed between the second baffle plate 121 and the front panel 220. An inlet 215 is formed.

When the input fuel F is combusted in the primary combustion chamber 212, the temperature inside the primary combustion chamber 212 rises and is maintained at a high temperature. Then, a draft phenomenon occurs in the primary combustion chamber 212, a strong upward air current is generated, and the combustion gas tends to flow upward. Thereby, the combustion gas flows into the flue S1 from the first inlet 214 and flows in the direction toward the second inlet 215 (in the direction of arrow a) along the flue S1. Then, the combustion gas that has reached the second inlet 215 flows into the flue S2 from here, turns back in the direction opposite to the flue S1 (direction of arrow b), flows along the flue S2, and flows through the exhaust outlet. and is exhausted through the chimney 230.

On the other hand, with the generation of upward airflow, a large amount of outside air is drawn into the primary combustion chamber 212 from the intake port 213, thereby performing high-temperature combustion. At this time, since the rectifier 100 is located above the primary combustion chamber 212, that is, directly above the combustion flame, the flue S1 and the flue S2 are maintained at a high temperature. Thereby, secondary combustion of the incompletely combusted gas generated during the primary combustion occurs while flowing through the flue S1 and the flue S2.

According to the rectifier 100 and the stove 200 according to the present embodiment, the combustion gas generated in the primary combustion chamber 212 is turned around in the horizontal direction by the first rectifier 110 and the second rectifier 120 to flow. The flue length of the combustion gas can be set longer. As a result, a strong draft phenomenon can be generated within the primary combustion chamber 212, so that a compact stove with a short chimney 230 attached to the outside of the stove 200 can be manufactured. Further, the residence time of the combustion gas becomes longer, and secondary combustion can be sufficiently performed. As a result, the thermal power can be further increased, and the exhaust gas can be clean and free from incompletely combusted gas. Furthermore, since the flow of air within the primary combustion chamber 212 is rectified in the horizontal direction, the intake resistance is reduced and the stove 200 can have high heating power.

The present invention is not limited to the embodiments described above, and various modifications and combinations are possible within the scope of the claims and embodiments, and these modifications and combinations are also possible. It is included in the scope of rights.

For example, in the embodiment, the stove body 210 is made of a one-ton can, but the stove body 210 is not limited to this, and may be made using a box-shaped or cylindrical member that can form a primary combustion chamber inside. can. Furthermore, the first support section 112 and the second support section 122 that integrate the first flow rectification section 110 and the second flow rectification section 120 are formed integrally with the first flow rectification plate 111 and the second flow rectification plate 121, respectively. , this may be made of a separate member, or conversely, the first current plate 111, the first support portion 112, the second current plate 121, and the second support portion 122 may all be formed integrally.

100 Combustion gas rectifier 110 First rectifier 111 First rectifier plate 120 Second rectifier 121 Second rectifier plate 200 Stove 210 Stove body 212 Primary combustion chamber 213 Intake port 214 First inlet 215 Second inlet

Claims (2)

Combustion gas from a stove that is disposed between an intake port provided in front of the primary combustion chamber and an exhaust port provided above, and guides the flame and combustion gas generated in the primary combustion chamber to the exhaust port. A rectifier,
comprising a first rectifier and a second rectifier disposed above the first rectifier,
The first rectifying section includes a first inlet through which flames and combustion gas rising from the combustion chamber flow in from a side opposite to the intake port, and a first inlet extending horizontally from the first inlet. a first baffle plate that causes the incoming combustion gas to flow toward the intake port,
The second rectifier includes a second inlet through which the flame and combustion gas rising from the first rectifier flow in from the intake port side, and a second inlet that extends horizontally from the second inlet. A combustion gas rectifying device for a stove, comprising a second rectifying plate that causes flame and combustion gas flowing in from an inlet to flow toward a side opposite to the intake port. A stove comprising the stove combustion gas rectifier according to claim 1.

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