Improved combustion efficiency wood stove

Abstract

A wood-burning stove with improved combustion efficiency according to the present invention may include: a stove body having a combustion space formed on the inside, which is a space where wood is fed and burned and combustion gas generated by the combustion of the wood flows; a power generation unit that generates electrical energy by generating power from the thermal energy generated by the combustion of the wood; and a fan that is driven by receiving the electrical energy and supplies air from the outside of the stove body toward the combustion space.

Description

Technology Field

[0001] The present invention relates to a wood-burning stove with improved combustion efficiency, and more specifically, to a wood-burning stove in which the cross-sectional area of ​​the inner region of the middle section of the stove body is formed to be narrowed so that the flow velocity of the fluid flowing through the combustion space inside the stove body increases as it passes through the middle section from the bottom, thereby improving combustion efficiency, and a fan that supplies air to the combustion space is driven by electrical energy generated from the thermal energy produced by the combustion of firewood. Background Technology

[0003] Generally, stoves utilize firewood in addition to burning oil or coal. When heating with firewood in this manner, a space of a certain size must be provided inside to ensure efficient combustion, and a passageway must be formed to allow external oxygen to flow in easily.

[0005] Recently, many small wood-burning stoves are being developed for outdoor use, in addition to household and agricultural applications. In particular, as the number of people enjoying auto camping increases due to the development of transportation and the leisure industry, the use of wood-burning stoves at campsites is on the rise.

[0006] In addition, as the burden of fuel costs has recently increased due to rising oil prices, there is a growing number of cases where factories and farms that previously used diesel or anthracite coal for heating are switching to wood-burning stoves instead of anthracite coal to reduce fuel costs.

[0007] Wood-burning stoves provide heating by burning wood or pellets. However, conventional wood-burning stoves have the disadvantage of low combustion efficiency because complete combustion is difficult.

[0008] For wood fuel to be a complete fuel, supplying high-temperature air and maintaining a high temperature of the flame inside the combustion chamber are important; however, due to the nature of wood fuel, the temperature of the flame inside the chamber gradually decreases as it burns, so there is a limitation in that it is difficult to maintain a high temperature inside the combustion chamber. Prior art literature

[0010] Korean Registered Patent No. 10-2582096 The problem to be solved

[0011] The objective of the present invention is to provide a wood-burning stove with improved combustion efficiency, wherein the cross-sectional area of ​​the inner region of the middle section of the stove body is formed to be narrowed, thereby increasing the flow velocity of the fluid flowing through the combustion space inside the stove body as it passes through the middle section from the bottom, and wherein the combustion efficiency is improved by driving a fan that supplies air to the combustion space using electrical energy generated from the thermal energy produced by the combustion of firewood.

[0012] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0014] A wood-burning stove with improved combustion efficiency according to the present invention may include: a stove body having a combustion space formed on the inside, which is a space where wood is fed and burned and combustion gas generated by the combustion of the wood flows; a power generation unit that generates electrical energy by generating power from the thermal energy generated by the combustion of the wood; and a fan that is driven by receiving the electrical energy and supplies air from the outside of the stove body toward the combustion space.

[0015] Preferably, the stove body may comprise: a lower body forming a first region that forms the bottom of the combustion space; a middle body forming a second region that forms the middle of the combustion space and is located above the first region; and a top body forming a third region that forms the top of the combustion space and is located above the second region.

[0016] Preferably, the above-mentioned main body may be formed such that the second cross-sectional area of ​​the second region based on the ground is less than or equal to the first cross-sectional area of ​​the first region and the third cross-sectional area of ​​the third region.

[0017] Preferably, the above-mentioned main body may be formed such that the second cross-sectional area narrows as it extends from the bottom to the top, or such that the second cross-sectional area narrows as it extends from the top to the bottom, or such that the second cross-sectional area narrows as it extends from the top and bottom to the central portion, respectively.

[0018] Preferably, the wood-burning stove with improved combustion efficiency may further include: a flow rate measuring unit that measures a flow rate, which is the speed of a fluid flowing within the combustion space, and generates flow rate information; and a processor that controls the fan based on the flow rate indicated by the flow rate information.

[0019] Preferably, the processor can control the rotational speed of the fan so that the flow rate is included in a reference flow rate range. Effects of the invention

[0021] According to the present invention, the cross-sectional area of ​​the inner region of the middle section of the stove body is formed to be narrowed, so that the flow velocity of the fluid flowing through the combustion space inside the stove body increases as it passes through the middle section from the bottom, thereby improving combustion efficiency, and the combustion efficiency can be improved by driving a fan that supplies air to the combustion space with electrical energy generated from the heat energy produced by the combustion of firewood. Brief explanation of the drawing

[0023] FIG. 1 is an upper perspective view of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. FIG. 2 is a lower perspective view of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. FIG. 3 is a block diagram of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. FIG. 4 is an exploded perspective view of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. FIG. 5 is a cross-sectional view of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating the process of adjusting the width of a second region of a wood-burning stove with improved combustion efficiency according to one embodiment of the present invention. Specific details for implementing the invention

[0024] Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives of the embodiments of the present invention. In connection with the description of the drawings, similar reference numerals may be used for similar components.

[0025] In this document, expressions such as "have," "may have," "include," or "may include" refer to the existence of the relevant feature (e.g., numerical values, functions, operations, or components, etc.) and do not exclude the existence of additional features.

[0026] In this document, expressions such as “A or B”, “at least one of A or / and B”, or “one or more of A or / and B” may include all possible combinations of items listed together. For example, “A or B”, “at least one of A and B”, or “at least one of A or B” may refer to cases including (1) at least one A, (2) at least one B, or (3) both at least one A and at least one B.

[0027] Expressions such as "first," "second," "first," or "second" used in this document may modify various components regardless of order and / or importance, and are used merely to distinguish one component from another without limiting such components. For example, the first customer device and the second customer device may represent different customer devices regardless of order or importance. For example, without departing from the scope of rights set forth in this document, the first component may be named the second component, and similarly, the second component may be renamed the first component.

[0028] When it is stated that a certain component (e.g., a first component) is "(operatively or communicatively) coupled with / to" or "connected to" another component (e.g., a second component), it should be understood that said certain component is directly connected to said other component or may be connected through said other component (e.g., a third component). On the other hand, when it is stated that a certain component (e.g., a first component) is "directly connected" or "directly connected" to said other component (e.g., a second component), it may be understood that no other component (e.g., a third component) exists between said certain component and said other component.

[0029] As used in this document, the expression "configured to" may be replaced, depending on the context, with, for example, "suitable for," "having the capacity to," "designed to," "adapted to," "made to," or "capable of." The term "configured to" does not necessarily mean "specifically designed to" in hardware. Instead, in some situations, the expression "device configured to" may mean that the device is "capable of" in conjunction with other devices or components. For example, the phrase “a processor configured (or set) to perform A, B, and C” may mean a dedicated processor for performing said operations (e.g., an embedded processor), or a generic-purpose processor (e.g., a CPU or an application processor) capable of performing said operations by executing one or more software programs stored in memory.

[0030] In particular, in this specification, “~stove” may include one or more of a Central Processing Unit (CPU), an Application Processor (AP), and a Communication Processor (CP).

[0031] In this specification, “~ stove” refers to any type of hardware device comprising at least one processor, and according to the embodiments, it may be understood to include software configurations operating on said hardware device.

[0032] The terms used in this document are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this document. Terms used in this document that are defined in general dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this document. In some cases, even terms defined in this document may not be interpreted to exclude the embodiments of this document.

[0033] FIG. 1 is an upper perspective view of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention, FIG. 2 is a lower perspective view of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention, FIG. 3 is a block diagram of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view for explaining the process of adjusting the width of a second region of a wood-burning stove with improved combustion efficiency according to an embodiment of the present invention.

[0034] Referring to FIGS. 1 to 6, a wood-burning stove (100) with improved combustion efficiency according to one embodiment of the present invention may include a stove body (110), an opening / closing part (120), a chimney part (130), a fan (140), a power generation part (150), a flow rate measuring part (S), a processor (CPU), a blocking plate (160), a driving part (170), and a storage part (M).

[0035] The stove body (110) may have combustion spaces (AR1, …, AR3) formed on the inside, which are spaces where firewood is fed in and burned, and where combustion gases generated by the combustion of the firewood flow.

[0036] That is, firewood can be introduced into combustion spaces (AR1, …, AR3) formed inside the stove body (110) and burned to generate thermal energy.

[0037] The stove body (110) can be formed from various materials that can be used as conventional stove body materials.

[0038] Meanwhile, the stove body (110) may be equipped with a lower body (111), a middle body (112), and an upper body (113).

[0039] That is, the stove body (110) may be composed of a lower body (111), a middle body (112), and an upper body (113).

[0040] In addition, the combustion space described above (AR1, …, AR3) may be divided into a first area (AR1), a second area (AR2), and a third area (AR3).

[0041] These first region (AR1), second region (AR2), and third region (AR3) can be interconnected to form a combustion space (AR1, …, AR3).

[0042] In other words, the lower body (111) can form a first region (AR1) that forms the bottom of the combustion space (AR1, …, AR3).

[0043] Additionally, the main body (112) forms the middle section of the combustion space (AR1, …, AR3) and can form a second section (AR2) located above the first section (AR1).

[0044] Additionally, the upper body (113) forms the upper part of the combustion space (AR1, …, AR3) and can form a third area (AR2) located above the second area (AR2).

[0045] Meanwhile, the main body (112) may be formed such that the second cross-sectional area based on the ground of the second area (AR2) formed on the inside is less than or equal to the first cross-sectional area of ​​the first area (AR1) and the third cross-sectional area of ​​the third area (AR3).

[0046] Specifically, the middle body (112) can be formed such that the second cross-sectional area of ​​the second region (AR2) becomes narrower from bottom to top, as shown in FIGS. 1, 2, 4 and 5.

[0047] In other words, the middle body (112) can be formed such that the second cross-sectional area of ​​the second region (AR2) becomes narrower as it moves from the lower body (111) toward the upper body (113).

[0048] Meanwhile, according to another embodiment, the main body (112) may be formed such that the second cross-sectional area of ​​the second region (AR2) becomes narrower as it goes from the top to the bottom.

[0049] In other words, the middle body (112) can be formed such that the second cross-sectional area of ​​the second region (AR2) becomes narrower as it moves from the upper body (113) toward the lower body (111).

[0050] Meanwhile, according to another embodiment, the main body (112) may be formed such that the second cross-sectional area of ​​the second region (AR2) becomes narrower as it moves from the upper and lower parts toward the center.

[0051] In other words, the middle body (112) is formed such that the second cross-sectional area of ​​the second region (AR2) widens as it moves toward the upper body (113) from the central part, which is the midpoint between the upper body (113) and the lower body (111), and the second cross-sectional area of ​​the second region (AR2) widens as it moves toward the lower body (111) from the central part.

[0052] Accordingly, the fluid flowing in the first region may increase in velocity while passing through the second region, where the cross-sectional area narrows.

[0053] Here, the fluid may include one or more of combustion gases generated by the combustion of firewood, incoming air flowing into the combustion space from the outside, and heat.

[0054] Meanwhile, the stove body (110) may have a through-hole (110a) formed therein to allow firewood to be fed into it.

[0055] Additionally, a through exhaust hole (110b) may be formed in the stove body (110) to allow combustion gas to be discharged to the outside.

[0056] Additionally, a through supply hole (110c) may be formed in the stove body (110) to supply air from the outside to the combustion space.

[0057] Meanwhile, the opening / closing part (120) can open and close the input hole (110a) described above.

[0058] The connecting part (130) is a hollow tube, and its lower end is connected to the discharge hole (110b) so that combustion gas discharged from the discharge hole (110b) can be discharged to the outside.

[0059] The fan (140) is located on the outside of the stove body (110) and can be driven to flow supply air toward the supply hole (110c).

[0060] At this time, the fan (140) can be driven by receiving electric energy generated from the power generation unit (150) described later.

[0061] Accordingly, supply air can be flowed toward the supply hole (110c) by the fan (140) and then flow into the inside of the stove body (110).

[0062] The fan (140) can be driven by a processor (CPU).

[0063] Meanwhile, to prevent ash generated from the combustion of firewood from the supply hole (110c) from leaking out, a hole cover (140') covering the supply hole (110c) may be installed on the stove body (110). This hole cover (140') may be equipped with a filter that prevents ash from passing through but allows air to pass through.

[0064] The driving control of the fan (140) by the processor (CPU) will be described later.

[0065] The power generation unit (150) can generate electrical energy by generating power from the heat energy generated by the combustion of firewood.

[0066] The power generation unit (150) can be located within the combustion space (AR1, …, AR3) to perform power generation.

[0067] To this end, the power generation unit (150) may be equipped with a thermoelectric element.

[0068] The power generation unit (150) can supply the generated electric energy to the fan (140) by performing power generation.

[0069] The flow velocity measuring unit (S) can generate flow velocity information by measuring the flow velocity, which is the velocity of the fluid flowing within the combustion space (AR1, …, AR3).

[0070] Specifically, the flow velocity measuring unit (S) can generate flow velocity information by measuring the flow velocity, which is the velocity of the fluid flowing within the second region (AR2) among the combustion spaces (AR1, …, AR3).

[0071] The processor (CPU) can control the fan (140) based on the flow rate indicated by the flow rate information.

[0072] Specifically, the processor (CPU) can control the rotational speed of the fan (140) so that the flow rate indicated by the flow rate information is included in the reference flow rate range.

[0073] More specifically, the processor (CPU) can control the rotational speed of the fan (140) so that the rotational speed of the fan (140) increases when the flow rate indicated by the flow rate information is slower than the lowest flow rate of the reference flow rate range.

[0074] Additionally, the processor (CPU) can control the rotational speed of the fan (140) so that the rotational speed of the fan (140) is reduced when the flow rate indicated by the flow rate information is faster than the maximum flow rate of the reference flow rate range.

[0075] Additionally, the processor (CPU) can control the rotational speed of the fan (140) so that the current rotational speed of the fan (140) is maintained when the flow rate indicated by the flow rate information falls within the reference flow rate range.

[0076] Meanwhile, the processor (CPU) can set the above-described reference flow rate range in response to the temperature of the combustion space (AR1, …, AR3).

[0077] Specifically, the processor (CPU) can set the reference flow rate range such that the maximum and minimum flow rates of the reference flow rate range are faster as the temperature of the combustion space (AR1, …, AR3) decreases.

[0078] Meanwhile, the stove body (110) may have a through insertion hole (110d) formed therein so that a blocking plate (160), which will be described later, can be inserted.

[0079] A blocking plate (160) that blocks at least a portion of the second region (AR2) can be inserted into such an insertion hole (110d).

[0080] The blocking plate (160) is formed in a plate shape having a predetermined thickness, and when inserted into the insertion hole (110d) for a predetermined length, it can block at least a portion of the second region (AR2).

[0081] At this time, the driving unit (170) can move the blocking plate (160) inserted into the insertion hole (110d) in a first direction toward the second area (AR2) or in a second direction opposite to the first direction.

[0082] To this end, the drive unit (170) may be equipped with a motor and a gear that is rotated by the motor.

[0083] Additionally, the upper part of the blocking plate (160) may be provided with a gear that is continuously formed in a direction parallel to the first direction and engages with the gear of the driving unit (170) to receive rotational force.

[0084] That is, the gear is rotated by the rotation of the motor of the drive unit (170), and the gear meshed with the gear receives rotational force by the rotation of the gear, and the blocking plate (160) can be moved in a first direction or a second direction by the rotational force applied to the gear.

[0085] Such a driving unit (170) can be controlled by a processor (CPU).

[0086] Specifically, when the processor (CPU) controls the rotational speed of the fan (140) to a maximum rotational speed, it calculates the elapsed time from the control point in time when the rotational speed of the fan (140) was controlled to a maximum rotational speed to the current point in time, and if the elapsed time exceeds a reference time, it can check whether the flow rate indicated by the flow rate information is slower than the minimum flow rate of the reference flow rate range.

[0087] Next, the processor (CPU) can control the drive unit (170) so that the blocking plate (160) moves in a first direction, as shown in FIG. 6, if the flow rate indicated by the flow rate information is slower than the lowest flow rate of the reference flow rate range.

[0088] Specifically, the processor (CPU) can control the drive unit (170) so that when the flow rate indicated by the flow rate information is slower than the lowest flow rate of the reference flow rate range, the blocking plate (160) moves in the first direction so as not to block the entire second area (AR2), but to block a part of it so that the second cross-sectional area is narrowed.

[0089] Conversely, if the processor (CPU) checks and determines that the flow rate indicated by the flow rate information is not slower than the lowest flow rate of the reference flow rate range, the blocking plate (160) does not block the second area (AR2) at all, and the driving unit (170) can be controlled so that the second cross-sectional area is not narrowed.

[0090] Through this, even if the fan (140) is controlled at maximum speed, if the flow rate is slower than the minimum flow rate of the reference flow rate range, the flow rate can be increased by blocking a part of the second area (AR2) with the blocking plate (160) to narrow the second cross-sectional area.

[0091] Meanwhile, the processor (CPU) can control the overall operation of the wood-burning stove (100) with improved combustion efficiency by using various programs stored in the storage unit (M). The processor (CPU) may be composed of RAM, ROM, a graphics processing unit, a main CPU, first to n interfaces, and a bus. At this time, the RAM, ROM, graphics processing unit, main CPU, first to n interfaces, etc., may be connected to each other through a bus.

[0092] RAM stores the O / S and application programs. Specifically, when the wood-burning stove (100) with improved combustion efficiency boots up, the O / S is stored in RAM, and various application data selected by the user can be stored in RAM.

[0093] The ROM stores instruction sets for system booting, etc. When a turn-on command is input and power is supplied, the main CPU copies the O / S stored in the storage unit (M) to the RAM according to the instructions stored in the ROM, and executes the O / S to boot the system. When booting is complete, the main CPU copies various application programs stored in the storage unit (M) to the RAM, and executes the application programs copied to the RAM to perform various operations.

[0094] The main CPU accesses the storage unit (M) and performs booting using the OS stored in the storage unit (M). Additionally, the main CPU performs various operations using various programs, content, data, etc. stored in the storage unit (M).

[0095] The first to n interfaces are connected to the various components described above. One of the first to n interfaces may be a network interface connected to an external device through a network.

[0096] Meanwhile, the processor (CPU) may include one or more cores (not shown) and a graphics processing unit (not shown) and / or a connection channel (e.g., a bus, etc.) for transmitting and receiving signals with other components.

[0097] Meanwhile, the processor (CPU) may further include RAM (Random Access Memory, not shown) and ROM (Read-Only Memory, not shown) for temporarily and / or permanently storing signals (or data) processed within the processor (CPU). Additionally, the processor (CPU) may be implemented in the form of a system-on-chip (SoC) that includes at least one of a graphics processing unit, RAM, and ROM.

[0098] The storage unit (M) can store various programs and data required for the operation of the wood-burning stove (100) with improved combustion efficiency. The storage unit (M) can be implemented as non-volatile memory, volatile memory, flash memory, hard disk drive (HDD), or solid-state drive (SSD).

[0099] The storage unit (M) can store programs (one or more instructions) for processing and controlling the processor (CPU). The programs stored in the storage unit (M) can be divided into multiple modules according to their function.

[0100] The present invention has been described above with reference to preferred embodiments. Those skilled in the art will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of the claims should be interpreted as being included in the invention.

[0101] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0103] 100: Wood-burning stove with improved combustion efficiency 110: Stove body 120: Opening / closing part 130: Connecting part 140: Fan 150: Power Generation Department 160: Blocking plate 170: Drive unit M: Storage unit S: Flow velocity measuring unit CPU: Processor

Claims

Claim 1 A wood-burning stove with improved combustion efficiency comprises: a stove body having a combustion space formed on the inside, which is a space where firewood is fed and burned and combustion gases generated by the combustion of the firewood flow; a power generation unit that generates electrical energy by performing power generation from the thermal energy generated by the combustion of the firewood; and a fan that is driven by receiving the electrical energy and supplies air from the outside of the stove body toward the combustion space; wherein the stove body comprises a lower body forming a first region that forms the bottom of the combustion space; The stove body comprises a middle body that forms a second region located above the first region and forms an intermediate section of the combustion space; wherein the stove body has a penetrating insertion hole formed to allow a blocking plate formed in a plate shape having a predetermined thickness to be inserted, and when the blocking plate is inserted into the insertion hole by a predetermined length, it blocks at least a portion of the second region; the wood stove with improved combustion efficiency further comprises a driving unit that moves the blocking plate inserted into the insertion hole in a first direction toward the second region or in a second direction opposite to the first direction, wherein the driving unit comprises a motor; and a gear that is rotated by the motor; wherein the blocking plate has a gear that is continuously formed on the upper side in a direction parallel to the first direction and is meshed with the gear to receive rotational force; and the wood stove with improved combustion efficiency comprises a flow velocity measuring unit that measures the flow velocity, which is the speed of a fluid flowing within the combustion space, and generates flow velocity information. and a processor that controls the drive unit and the fan based on the flow rate indicated by the above flow rate information;The method further includes, wherein the processor calculates the elapsed time from the control point in time when the rotational speed of the fan is controlled to the maximum rotational speed to the current point in time, and if the elapsed time exceeds a reference time, checks whether the flow velocity is slower than the minimum flow velocity of the reference flow velocity range, and if the flow velocity is slower than the minimum flow velocity, controls the drive unit so that the second cross-sectional area of ​​the second area relative to the ground is narrowed by moving the blocking plate in the first direction to block a part of the second area, and if the flow velocity is not slower than the minimum flow velocity, controls the drive unit so that the second cross-sectional area is not narrowed by not blocking the second area at all by the blocking plate, and the processor sets the reference flow velocity range in correspondence with the temperature of the combustion space, wherein the reference flow velocity range is set such that the maximum and minimum flow velocities of the reference flow velocity range are faster as the temperature is lower; Wood-burning stove with improved combustion efficiency. Claim 2 A wood-burning stove with improved combustion efficiency, characterized in that, in claim 1, the stove body comprises an upper body that forms the upper part of the combustion space and forms a third area located above the second area. Claim 3 A wood-burning stove with improved combustion efficiency according to paragraph 2, characterized in that the above-mentioned main body is formed such that the second cross-sectional area is less than or equal to the first cross-sectional area of ​​the first region and the third cross-sectional area of ​​the third region. Claim 4 A wood-burning stove with improved combustion efficiency, characterized in that, in paragraph 3, the above-mentioned main body is formed such that the second cross-sectional area narrows as it goes from the bottom to the top, or such that the second cross-sectional area narrows as it goes from the top to the bottom, or such that the second cross-sectional area narrows as it goes from the top and bottom to the central part, respectively. Claim 5 delete Claim 6 A wood-burning stove with improved combustion efficiency according to claim 1, wherein the processor controls the rotational speed of the fan so that the flow rate is included in a reference flow rate range.

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