JP2013190195A - Combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply wood pellets without using any commercial power supply generated by burning fossil fuel such as oil, since a pellet stove not needing any electricity as a power source cannot be used after all because no fuel is supplied during blackout.SOLUTION: A combustion apparatus includes a fire chamber 19 for combusting wood pellets P, a thermoelectric power generation module 29 disposed outside the fire chamber 19 to generate power on the basis of a temperature difference caused by heating with an internal temperature of the fire chamber 19 and by cooling with an external temperature outside the fire chamber 19, and electric drive means (an exhaust fan 15, a blast fan 23, a drum-type pellet supply system 25, an ignition heater 26, an air supply fan 28) which operates using, as a drive force, thermoelectric power generated by the thermoelectric power generation module 29.

Description

  The present invention relates to a combustion apparatus having a combustion chamber, and more particularly to a combustion apparatus for burning wood pellets as a combustion material in a combustion chamber.

  2. Description of the Related Art Conventionally, a pellet stove using wood pellets as one of alternative energy for fossil fuels such as oil is known. Wood pellets are, for example, about 6 mm in diameter and about 6 mm in length after being crushed into powder from sawdust generated in the manufacturing process of wood and thinned wood generated in the forest growing process. It is formed by compression molding into a cylindrical shape of 10 to 30 mm.

  These wood pellets are renewable and recyclable energy derived from biomass (plant resources), and do not increase carbon dioxide in the atmosphere like fossil fuels when burning, that is, they are released when burning wood pellets Carbon dioxide is equivalent to the carbon dioxide absorbed when the raw tree grows, and the amount of carbon dioxide throughout the earth is balanced (the so-called carbon neutral concept), so it is effective in combating global warming. As one, it has recently been in the spotlight.

  In a pellet stove that uses wood pellets as fuel, a supply means for continuously supplying wood pellets to the fire is provided, and as a supply means for supplying wood pellets, for example, a fuel transfer device using a screw (See Patent Document 1). The fuel transfer device using a screw has an upper screw and a lower screw arranged in two upper and lower stages, each rotated by the driving force of a motor, and scrapes the wood pellets put into the fuel storage hopper with the upper screw. The fallen wooden pellets are pushed out to the combustion chamber side by the lower screw and conveyed to the inside of the combustion chamber.

  Since the fuel conveying device using the screw uses a motor to rotate the screw, it naturally requires electric power for driving the motor, and is usually supplied from an electric power company as an electric power supply source. A commercial power supply was used.

JP 2009-24983 A

  However, when using commercial power, if the power supply from the power company stops, such as a power failure, the motor cannot be driven and the fuel transfer device will not function. As a result, wood pellets as fuel will be supplied to the combustion chamber You will not be able to. For this reason, although it is a pellet stove that uses wood pellets as a heat source by burning it as a heat source and does not require electricity as a heat source, it cannot supply fuel during a power outage and can eventually use a pellet stove. Disappear.

In addition, pellet stoves that use wood pellets derived from biomass (plant resources), which are recyclable and renewable energy, as fuel, are produced by burning fossil fuels such as oil for motor drive. It is desirable to be able to supply wood pellets without using a commercial power source.
An object of the present invention is to provide a combustion apparatus that can reliably supply fuel without using a commercial power supply that stops power supply due to a power failure or the like, and that can contribute to countermeasures against global warming during fuel supply. Is to provide.

  In order to achieve the above object, a combustion apparatus according to the present invention comprises a combustion chamber for burning a combustion material, and heating at a combustion temperature generated by combustion in the combustion chamber and cooling at an external temperature of the combustion chamber. The thermoelectric generator module that generates electric power based on the temperature difference generated by the electric power generation means, and the electric drive means that operates using the thermal power generated by the thermoelectric generator module as a driving force.

Further, a combustion apparatus according to another aspect of the present invention includes a power storage device that stores heat using the thermoelectric power generated by the thermoelectric generation module, and the power supplied from the power storage device is used as the driving force of the electric drive means. It is characterized by doing.
Further, in the combustion apparatus according to another aspect of the present invention, the electric drive means includes a combustion material supply device that supplies the combustion material from a combustion material storage to the combustion chamber, and supplies or exhausts air to the combustion chamber. It is at least one of the fan for performing, and the fan which sends out the heated air in a combustion chamber, It is characterized by the above-mentioned.

Further, a combustion apparatus according to another aspect of the present invention is characterized by having combustion temperature transmission means for transmitting heat generated by combustion in the combustion chamber to a heating portion of the thermoelectric generator module.
The combustion apparatus according to another aspect of the present invention is characterized in that the combustion material is a wood pellet.

  According to the combustion apparatus of the present invention, the thermoelectric generator module performs temperature difference power generation by heating the internal combustion chamber with the internal temperature of the combustion chamber and cooling the external temperature of the combustion chamber, thereby generating the thermoelectric generation module. Therefore, it is possible to reliably supply the fuel without using a commercial power source that stops power supply due to a power failure or the like by supplying the fuel with the electric drive means. In addition, it can contribute to global warming countermeasures when supplying fuel.

It is a section explanatory view showing typically the composition of the combustion device concerning one embodiment of this invention. It is explanatory drawing which shows an example in the case of utilizing the temperature difference of combustion temperature and external temperature with a thermoelectric generation module. It is sectional explanatory drawing which shows typically the structure of the combustion apparatus provided with the screw-type pellet conveying apparatus. It is explanatory drawing by the longitudinal cross-section which shows typically the pellet stove concerning 2nd Embodiment of this invention. It is a partial explanatory view by the cross section along the AA line of FIG. FIG. 5 is a partial explanatory diagram of a cross section taken along line BB in FIG. 4. FIG. 5 is an explanatory perspective view illustrating a configuration of a heat radiating unit in FIG. 4. It is explanatory drawing by the chimney cross section which shows the state which mounted | wore the chimney with the thermoelectric generation module. It is explanatory drawing which shows typically the heat transfer method to the thermoelectric generation module which concerns on 3rd Embodiment of this invention. It is explanatory drawing which shows typically the other example of the heat transfer method to a thermoelectric generation module.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional explanatory view schematically showing the configuration of a combustion apparatus according to a first embodiment of the present invention. As shown in FIG. 1, a pellet stove (combustion device) 10 has a stove body 11 and a fuel storage 12, both of which have a box-shaped or cylindrical shape having an internal space and a fuel storage 12. The adjacent spaces S are arranged side by side and are connected via the fuel supply path 13.
This pellet stove 10 uses wood pellets P, which is renewable energy derived from biomass (plant resources) as fuel (combustion material), and burns the wood pellets P inside the stove body 11. By this, the room | chamber interior etc. in which the stove main body 11 was installed can be warmed.

  An exhaust chimney 14 is provided on the upper end surface (top plate surface) of the stove body 11 so as to communicate with the interior space of the main body and extend vertically upward and open to the outside air. An exhaust fan 15 that blows air toward the opening is installed. The upper end surface (top plate surface) of the fuel storage 12 is provided with a fuel input port 12a that communicates with a hopper 16 provided in the upper portion of the internal storage, and a lid 17 that opens and closes the fuel input port 12a. The wood pellet P can be stored in the hopper 16 by opening the lid 17 and introducing the wood pellet P into the hopper 16 from the fuel inlet 12a. A pellet discharge port 16a is opened at the lower end of the hopper 16, and the wood pellets P stored in the hopper 16 naturally fall from the pellet discharge port 16a.

The interior of the stove body 11 is divided into an upper space that becomes a fire chamber (combustion chamber) 19 and a lower space that stores the ash tray 20 by a partition wall 18 provided at the lower portion. In the center of the plane, a rooster (eye plate) 21 is installed as a fuel shelf on which the wood pellets P are burned by being placed one step down from the periphery. The fire chamber 19 that is the upper space functions as a combustion chamber in which the wood pellets P burn, and the lower space is an ash tray storage chamber in which the ash tray 20 that receives the ash falling from the rooster 21 after burning the wood pellets is placed.
A warm air delivery chamber 22 is defined on the front side of the upper body of the fire chamber 19. The hot air delivery chamber 22 communicates with the outside of the stove body 11 through a blower opening 22a that opens to the outer surface on the front side of the stove body 11. The hot air delivery chamber 22 is connected to the stove body from the blower opening 22a. A blower fan 23 for sending the heated air in the fire chamber 19 toward the outside of the heater 11 is installed.

On the rear surface side of the lower main body of the fire chamber 19, that is, on the rear surface side of the main body above the partition wall 18, the fuel supply path 13 that is inclined downward from the fuel storage 12 toward the stove main body 11 is connected to the stove main body 11. A fire chamber port 13a, which is a communication port, is open. A pellet guide portion 24 that protrudes into the fire chamber 19 with the fuel supply path 13 extended is provided at the fire chamber port 13a. The pellet guide portion 24 has its tip portion facing the rooster 21 from above. Yes.
The other end of the fuel supply passage 13 whose one end communicates with the fire chamber 19 communicates with the interior of the fuel storage 12 via a fuel storage port 13b that opens to the fuel storage 12 side. It is located below the pellet outlet 16a.

  Between the fuel storage port 13b and the pellet discharge port 16a, the wood pellets P which are located in the side of the fuel storage port 13b and below the pellet discharge port 16a and stored in the fuel storage port 12 are supplied with fuel. A drum-type pellet supply device 25 for feeding into the path 13 is installed. The drum-type pellet supply device 25 has a drum 25a that is a rotating body, and the drum 25a faces the fuel storage port 13b and the pellet discharge port 16a with the outer peripheral surface facing the fuel storage port 13b from the pellet discharge port 16a. It is pivotally supported so that it can rotate. On the outer peripheral surface of the drum 25a, a plurality of receiving portions 25b made of recesses capable of storing a plurality of wood pellets P are provided at substantially equal intervals in the circumferential direction (four locations are shown as an example). ing.

  The drum-type pellet supply device 25 rotates, for example, around the drum shaft by a motor drive, and receives a plurality of wood pellets P discharged from the pellet discharge port 16a below the pellet discharge port 16a by rotation. After storing in the part 25b, it goes to the fuel storage port 13b while storing the wooden pellet P, and the wooden pellet P is dropped from the receiving unit 25b toward the fuel storage port 13b. The fallen wood pellet P enters the fuel supply path 13 from the fuel storage port 13b, slides along the fuel supply path 13 toward the fire chamber port 13a, and is guided from the fire chamber port 13a to the pellet guide unit 24. Falls on the rooster 21. As described above, the rotation of the drum type pellet supply device 25 causes the wood pellets P stored in the fuel storage 12 to continue to the rooster 21 installed in the fire chamber 18 via the fuel supply path 13. Sent in.

  An ignition heater 26 is disposed below the rooster 21. The ignition heater 26 has a tip projecting toward the upper surface side of the rooster 21 and is energized to generate heat, so that the wood pellet P that covers the tip and is deposited on the upper surface side of the rooster 21 is heated. P is on fire. In this way, the ignition heater 26 is in direct contact with the wood pellets P, and the blower fan (not shown) sends air to the ignition heater 26 that is energized and becomes in a heat generating state. The wood pellet P may be ignited by blowing hot air onto the wood pellet P.

A lower space serving as an ash tray storage chamber below the rooster 21 is partitioned, and an air supply port 27 that opens to the outer surface of the stove body 11 and communicates with the lower space is opened in the lower portion of the stove body 11. An air supply fan 28 is installed in the lower space so as to face the air supply port 27 and suck the air outside the stove body 11 into the lower space and supply it to the rooster 21.
A thermoelectric generation module 29 is attached to the outer surface of the stove body 11 that is outside the fire chamber 19. The thermoelectric generator module 29 uses a thermoelectric conversion element that applies a Zepek effect that generates a thermoelectromotive force when a temperature difference is given between a heating side surface and a cooling side surface provided on the front and back surfaces of the element. Thermoelectric power generation can be performed by the temperature difference between the outer surface temperature of the stove body 11 heated by the above and the ambient temperature (installation place temperature) of the place where the pellet stove 10 is installed.

  That is, the thermoelectric generator module 29 attached to the stove body 11 is made of pellets such as the exhaust fan 15, the blower fan 23, the fuel supply drum 25, the ignition heater 26, and the air supply fan 27 due to the temperature difference obtained in the stove body 11. Drive power for driving all or part of the electric drive means used in the stove 10 is generated. Therefore, at least a part of the electric drive means used in the pellet stove 10 generates electric power generated by the thermoelectric generation module 29 that functions according to its own temperature in the heating state of the pellet stove 10, and power for driving the electric drive means. That is, it is used as a power source for motor driving and a heat source for an ignition heater.

  One or a plurality of thermoelectric power generation modules 29 required for a desired power generation amount are disposed on the outer surface of the stove body 11, for example, above the fuel supply path 13 in the space S adjacent to the fuel storage 12 (as an example). Or the heating side surface is closely attached to the outer surface and the cooling side surface is exposed to the adjacent space S (see FIG. 1). The thermoelectric power generated by the thermoelectric generation module 29 is sent to and stored in the storage battery 30 installed in the inner lower space of the fuel storage 12.

  The storage battery 30 is connected to electric drive means for driving with the output power of the storage battery 30, and these electric drive means are brought into an energized state with the storage battery 30 by an ON operation of an operation switch (not shown). Thus, electric power is supplied from the storage battery 30 and driven. By using the storage battery 30, an ignition heater 26 for igniting the wood pellet P on the rooster 21 and a drum for feeding the wood pellet P onto the rooster 21 at the start of operation of the pellet stove 10 where the thermoelectric generation module 29 is not functioning The type pellet feeder 25 can be activated.

  The location of the thermoelectric generator module 29 may be anywhere as long as the temperature difference between the heating side surface and the cooling side surface of the thermoelectric generation module 29 can ensure the temperature difference that generates the required generated power. When a large amount of generated power is required, for example, a temperature difference between the combustion temperature inside the fire chamber 18 and the outside air temperature outside the building where the pellet stove 10 is installed may be used. For this reason, a means for transmitting the combustion temperature of the fire chamber 18 to the heating side surface and a transmission means for transmitting the outside air temperature outside the building to the cooling side surface are provided.

  FIG. 2 is an explanatory diagram showing an example in the case where a temperature difference between the combustion temperature and the outside air temperature is used in the thermoelectric generator module. As shown in FIG. 2, a combustion temperature conductor (combustion temperature transmission means) 31 inside the fire chamber 18, an outside air temperature conductor (outside air temperature transmission means) 32 outside the building where the pellet stove 10 is installed, Install each. The combustion temperature conductor 31 and the outside air temperature conductor 32 are both formed of a member excellent in temperature transmission, and the combustion temperature conductor 31 is directly transmitted to the pellet combustion temperature when the wood pellet P burns. The temperature detection end is arranged close to the combustion flame, and the outside air temperature conductor 32 is arranged with the temperature detection end exposed to the outside air so that the outside air temperature outside the building is directly transmitted.

  The combustion temperature conductor 31 is connected to the heating side surface of the thermoelectric generation module 29, and the outside air temperature conductor 32 is connected to the cooling side surface of the thermoelectric generation module 29, and is detected by the temperature detection end of the combustion temperature conductor 31. The pellet combustion temperature is transmitted to the heating side surface, and the outside air temperature detected by the temperature detection end of the outside air temperature conductor 32 is transmitted to the cooling side surface. Note that either one or both of the combustion temperature conductor 31 and the outside temperature conductor 32 may be used, and when both are used, the temperature difference becomes the largest.

Next, the operation of the pellet stove 10 having the above configuration will be described.
First, the lid 17 of the fuel storage 12 is opened, the amount of the wood pellets P stored in the hopper 16 is confirmed, and if necessary, the wood pellets P are put into the hopper 16 from the fuel inlet 12a. The wood pellet P is replenished.
Next, an operation switch (not shown) of the pellet stove 10 is turned on (ON) to put the pellet stove 10 into an operation start state. As a result, electric power is supplied from the storage battery 30, the exhaust fan 15 and the air supply fan 27 become operable together with the drum-type pellet supply device 25 and the ignition heater 26, and the drum-type pellet supply device 25 starts operating. Then, the ignition heater 26 enters a heated state, and the exhaust fan 15 and the air supply fan 27 start to blow air.

  When the drum-type pellet supply device 25 starts to operate, the wood pellets P in the hopper 16 are sent to the rooster 21 through the fuel supply passage 13 and are stacked on the rooster 21. When the contacting heater 26 is in a heated state, the wood pellet P on the rooster 21 is ignited. At this time, outside air is drawn into the lower space below the rooster 21 by the air supply fan 27, and air is supplied to the rooster 21 from below.

  After that, by igniting the plurality of wood pellets P stacked on the rooster 21 starting from the fired wood pellets P, the combustion is expanded and the combustion is continued, and the stable combustion state continues and the fire chamber 18 When the internal temperature of the air reaches the set temperature, the blower fan 23 operates. By the operation of the blower fan 23, the air heated by the combustion of the wood pellets P in the fire chamber 19 is sent out from the hot air delivery chamber 22 to the outside of the stove body 11 through the blower opening 22 a.

Therefore, in the place where the pellet stove 10 is installed, the heat generated by the combustion of the wood pellet P is dissipated as the radiant heat from the stove body 11 around the outside of the stove body 11, and in the fire chamber 19. Since the heated air is sent out from the blower opening 22a toward the outside of the stove body 11 by the blower fan 23, the room where the pellet stove 10 is installed can be efficiently warmed.
In the pellet stove 10, the wood pellets P stored in the fuel storage 12 may be fed into the fuel supply path 13 using a screw type pellet conveying device instead of the drum type pellet supplying device 25. .

  FIG. 3 is a cross-sectional explanatory view schematically showing the configuration of a combustion apparatus equipped with a screw-type pellet conveying apparatus. As shown in FIG. 3, the screw-type pellet conveying device 33 is formed by a rotating body in which a spiral wing 33 b is continuously provided around a screw shaft 33 a, and a fuel storage port 13 b of the fuel supply path 13. From the pellet discharge port 16a of the hopper 16 located below the hopper 16, it is inclined upwardly toward the fuel storage port 13b. In the case of the screw-type pellet transport device 33, the pellet discharge port 16a can be positioned below the fuel storage port 13b (in the lowest case, the bottom of the fuel storage 12). In comparison, the capacity for storing the wood pellets P of the hopper 16 can be increased.

  The screw-type pellet conveying device 33 rotates, for example, around a screw shaft 33a by a motor drive. By the rotation, a plurality of wood pellets P discharged from the pellet discharge port 16a are provided below the pellet discharge port 16a. After being received by the wing portion 33b, the wood pellet P is moved to the fuel storage port 13b with the wooden pellet P placed thereon, and the wood pellet P is dropped from the wing portion 33b at the fuel storage port 13b. The fallen wood pellet P enters the fuel supply path 13 from the fuel storage port 13b, slides along the fuel supply path 13 toward the fire chamber port 13a, and is guided from the fire chamber port 13a to the pellet guide unit 24. Falls on the rooster 21. Thus, the wood pellet P stored in the fuel storage 12 is sent to the rooster 21 installed inside the fire chamber 18 through the fuel supply path 13 by the rotation operation of the screw type pellet conveying device 33. .

  As described above, the electric power generated in the pellet stove 10 is supplied for supplying air to the drum-type pellet supply device 25 or the screw-type pellet conveyance device 33 and the fire chamber 18 for supplying the wood pellet P to the rooster 21. The air fan 28, the exhaust fan 15 for exhaust, and the blower fan 23 for blowing air from the fire chamber 18 can be driven, respectively, and are provided with cleaning means for automatically cleaning the rooster 21. The means can also be driven. By performing automatic cleaning of the rooster 21, the ash after combustion is removed from the rooster 21 and the combustion in the fire chamber 18 can be continued, and the pellet stove 10 can be operated continuously for 24 hours.

Further, by providing the pellet stove 10 with the storage battery 30, it is possible to supply electric power necessary for the initial operation of the pellet stove 10, and the electric drive means used in the pellet stove 10 is configured to generate heat generated by the combustion state. It can be operated stably at all times without being affected by fluctuations. Furthermore, if a power outlet for 100 [V] is provided, it can be used as a power supply source for general electric appliances and the like in the event of a power failure that occurs during a disaster or the like.
Further, the stove body 11 may be configured to be able to burn the soot in the fire chamber 18 so that the pellet stove 10 can be used as a soot stove.

(Second Embodiment)
FIG. 4 is a longitudinal sectional view schematically showing a pellet stove according to the second embodiment of the present invention, FIG. 5 is a partial explanatory view of a section along the line AA in FIG. 4, and FIG. FIG. 7 is a partial explanatory view showing a configuration of the heat dissipating section in FIG. 4.

  As shown in FIGS. 4 to 6, the pellet stove 40 has a lower part of the fuel storage 12 integrated with the stove main body 11, and has a battery storage portion 41 below the stove main body 11 and the fuel storage 12. 29 is disposed in the fuel storage 12, and includes a combustion temperature transmission unit 42 and a heat dissipation unit 43 attached to the thermoelectric generator module 29. In addition, there is a fire chamber 44 in which the hot air delivery chamber 22 with the blower opening 22a is not provided, and instead of the three fans of the exhaust fan 15, the blower fan 23, and the supply fan 28, the first blower fan is provided. 45, two fans of the second blower fan 46, and a blower passage 47 of the first blower fan 45. Other configurations are the same as those of the pellet stove according to the first embodiment (see FIG. 3).

The fuel storage 12 is integrated with the stove body 11 below the partition wall 18 of the stove body 11, and is partitioned from the stove body 11 by a wall portion 11 a of the stove body 11. The air supply port 27 that opens to the wall portion 11 a that partitions the stove body 11 and the fuel storage 12 communicates with the air supply passage 47 disposed in the fuel storage 12 and serves as an opening of the air supply passage 47 to the stove main body 11.
The battery storage unit 41 is formed integrally with the stove body 11 and the fuel storage 12 in a state where the stove body 11 and the fuel storage 12 are placed, and stores the storage battery 30 independent of the stove main body 11 and the fuel storage 12. Has internal space.

  Combustion temperature transmission part 42 consists of a plate-like member with good thermal conductivity, and is closely attached to the lower surface of rooster 21 of fire chamber 44 and surrounds rooster 21 in a wall shape so that the combustion temperature can be transmitted efficiently. At the same time, both ends of each are projecting portions 42a, penetrate the wall portion 11a, and are positioned substantially parallel to the interior of the fuel tank 12 (see FIG. 6). For example, two thermoelectric generator modules 29 each having a heat dissipating portion 43 are attached to the opposing surface sides of the projecting portions 42a and 42a in a vertically placed state with the heating side surface (heat absorbing side) in close contact.

  By this combustion temperature transmission part 42, the temperature of the rooster 21 heated by the combustion of the pellets P is transmitted to the heating side surface (heat absorption side) of the thermoelectric generator module 29. When the combustion temperature in the rooster 21 is high and the temperature transmitted to the thermoelectric generator module 29 via the combustion temperature transmission unit 42 becomes higher than the allowable limit, the combustion temperature transmission unit 42 is provided with a hole penetrating the front and back surfaces, for example. It adjusts so that the temperature transmission capability of the combustion temperature transmission part 42 may become low as needed, such as opening.

  As shown in FIG. 7, the heat radiating portion 43 is formed by, for example, three heat pipes 48 being incorporated side by side with heat radiation fins 49 with their longitudinal side surfaces exposed, and the heat pipes 48 are positioned in the vertical direction. The exposed surface of each heat pipe 48 is attached in close contact with the cooling side surface (heat radiation side) of the thermoelectric generator module 29. The heat radiating part 43 attached to the thermoelectric generator module 29 penetrates the heat pipe 48 and the heat radiating fins 49 through the wall part 41 a that partitions the stove body 11, the fuel storage 12 and the battery storage part 41, and the internal space of the battery storage part 41. (See FIGS. 4 and 5).

  The internal space of the battery storage part 41 where the projecting sides of the heat pipe 48 and the heat radiating fins 49 are located is partitioned by the fire chamber 44, the partition wall 18 and the wall part 11a, and stores the ash tray 20 below the rooster 21. The combustion temperature is difficult to be transmitted because it is separated through the space to be separated and the internal space of the fuel storage 12. For this reason, it is suitable as an environment in which the cooling function by the heat pipe 48 and the heat radiating fins 49 is exhibited, and the heat radiating action by the heat radiating portion 43 can be made to work effectively.

  As described above, the thermoelectric power generation module 29 is positioned inside the fuel chamber 12 that is partitioned from the burning fire chamber 44 by the wall portion 11a via the combustion temperature transmission portion 42, so that sufficient heating ( Since heat absorption and cooling (heat radiation) can be performed, efficient power generation becomes possible. That is, the thermoelectric generator module 29 can be heated (heat absorption) by the combustion temperature via the combustion temperature transmission part 42 disposed in contact with the rooster 21 during combustion, and at the same time, the wall of the combustion chamber 44 is a wall part. Since it is arranged inside the fuel storage 12 that is partitioned and blocked by 11a, it can be cooled (heat radiation) at the temperature inside the fuel storage according to the room temperature that is the outside temperature of the stove body 11.

Further, since the fuel storage 12 in which the thermoelectric generation module 29 is disposed is partitioned from the burning fire chamber 44 by the wall portion 11a, the thermoelectric generation module 29 is not destroyed at the maximum temperature inside the fuel storage 12. Therefore, the use environment of the thermoelectric generator module 29 can be stably secured.
As shown in FIG. 4 to FIG. 6, an air passage 47 is arranged between the heat radiating portions 43, 43 arranged to face both the projecting portions 42 a, 42 a of the combustion temperature transmitting portion 42. The one end communicates with the air supply port 27 that opens in the wall portion 11 a of the stove body 11, and the other end is located inside the fuel storage 12 from both the heat radiation portions 43, 43. A first blower fan 45 is attached to the other end of the blower passage 47.

  The first blower fan 45 can be blown toward the air supply port 27 through the blower passage 47 by the fan rotating operation, and is taken into the interior of the fuel storage 12 and installed in the room where the pellet stove 40 is installed. Air is fed into the rooster 21 as combustion air. Thereby, the combustion efficiency of the fuel (pellet P) in the rooster 21 can be improved.

  The second blower fan 46 is disposed in the vicinity of the upper portion of the heat radiating portion 43 inside the fuel storage 12, that is, in the vicinity of the upper end of the heat dissipation fin 49. The cooling air 49 can be sucked from the lower end side of the radiating fin 49 through the radiating fin 49 to the upper end side (see FIG. 5). Along with the suction action of the cooling air, the warmed air around the stove body 11 together with the air warmed by the heat radiating action of the heat radiating portion 43 is discharged as warm air into the indoor space where the pellet stove 40 is installed. (See FIG. 5). As a result, the radiating fins 49 can be efficiently cooled, and the room can be effectively warmed by the air warmed by the combustion in the fire chamber 44.

In addition, the arrangement position of the 2nd ventilation fan 46 is not restricted above the heat radiating part 43, The lower part of the heat radiating part 43 inside the fuel storage 12, ie, the lower end of the heat radiating fin 49 may be sufficient. Thereby, suction of cooling air can be performed similarly.
In the pellet stove 40 having the above-described configuration, the temperature of the rooster 21 during combustion (for example, about 350 ° C.) is transmitted to the thermoelectric generation module 29 via the combustion temperature transmission unit 42, and By transmitting the room temperature, which is an external temperature, the thermoelectric generator module 29 generates power.

As a place where the thermoelectric generator module 29 is installed, it is desirable that a temperature difference between the heating (endothermic) side and the cooling (radiating) side is about 150 ° C. to about 250 ° C., for example, the heating (endothermic) side is about 280 ° C. Under the condition that the (heat dissipation) side is about 30 ° C. and the temperature difference is about 250 ° C., about 8V-24W can be supplied per thermoelectric module.
As described above, the combustion temperature transmission unit 42 that transmits the combustion temperature to the thermoelectric generator module 29 is disposed around the rooster 21 that is easy to manage temperature because the temperature is stable (see FIGS. 4 to 6). As a temperature transmitted to the power generation module 29, about 200 ° C. can be ensured even when setting a weak operation with few burning pellets P, and 200 ° C. or more can be obtained when setting a strong operation with many burning pellets P. In the above-described example, heat of about 180 ° C. to about 280 ° C. is transmitted to the heating (heat absorption) side of the thermoelectric generator module 29 via the combustion temperature transmission unit 42.

  The thermoelectric generator module 29 is installed in the fuel storage 12 that is partitioned from the burning fire chamber 44 by the wall portion 11a (see FIGS. 4 and 6), and further includes a heat pipe 48 and radiating fins 49. Since the heat radiation part 43 is mounted (see FIGS. 4 to 7), the cooling effect on the cooling (heat radiation) side can be enhanced. In addition, by operating the second blower fan 46 using the electric power generated by the thermoelectric generator module 29, the heat radiation effect of the heat radiation fins 49 is enhanced and the cooling (heat radiation) side is more efficiently cooled. Can do. Therefore, the cooling (heat radiation) side of the thermoelectric generation module 29 can be set to 30 ° C. or lower.

That is, the temperature difference between the heating (endothermic) side and the cooling (radiating) side required for the thermoelectric generator module 29 to generate electric power is about 150 ° C. to about 250 ° C., and the temperature in this range can be stably maintained. Since the place is around the rooster 21, the combustion temperature transmission unit 42 is installed around the rooster 21.
The electric power generated by the thermoelectric generator module 29 is stored in the storage battery 30 of the battery storage unit 41 via a rectifier (not shown). From the storage battery 30, a first blower fan 45 for combustion and a second blower fan for cooling. 46 and the drive means (for example, drive motor) of the screw-type pellet conveying device 33 for supplying fuel (pellet P) are supplied as drive power.

  Accordingly, by adjusting the number of the thermoelectric generator modules 29 attached to the protrusions 42a of the combustion temperature transmission unit 42, it is possible to secure the amount of power required as driving power (for example, four powers up to 96W). it can. In addition, since the electric power generated by the thermoelectric generator module 29 is stored in the storage battery 30, it can be used not only for the initial operation before the start of pellet combustion in the pellet stove 40, but also can be stably supplied as driving electric power. .

The thermoelectric generator module 29 may be attached to the exhaust chimney 14 together with the heat radiating portion 43.
FIG. 8 is an explanatory diagram of a chimney cross section showing a state in which the thermoelectric generator module is mounted on the chimney. As shown in FIG. 8, the thermoelectric generator module 29 is mounted via an attachment member 50 that is attached to the outer periphery at any position in the height direction of the chimney 14 and surrounds the outer periphery with four surfaces that intersect each other at substantially right angles. For example, a total of four thermoelectric generator modules 29 mounted on, for example, four surfaces of the attachment member 50 each have a combustion temperature transmission portion 51 made of, for example, a rod-shaped member on the heating (heat absorption) side, and a heat pipe 48 on the cooling (heat radiation) side. The heat radiating portions 43 including the heat radiating fins 49 are respectively attached.

  The combustion temperature transmission unit 51 has a protruding tip that protrudes substantially orthogonal to the chimney inner surface in the internal space of the chimney 14 serving as a smoke exhaust passage, and the heat radiation unit 43 exposes the heat radiation fins 49 to the outside of the chimney. Yes. The temperature of the flue gas passing through the inside of the chimney 14 is transmitted to the thermoelectric generation module 29 via the combustion temperature transmission unit 51 on the heating (heat absorption) side, and the chimney 14 is positioned on the cooling (heat radiation) side. The temperature (room temperature or outside air temperature) of the location to be transmitted is transmitted, and the thermoelectric generator module 29 generates power.

As the arbitrary position in the height direction of the chimney 14 where the thermoelectric generator module 29 is installed, the temperature on the heating (heat absorption) side and the cooling (radiation) side where the required amount of power generation can be generated by the thermoelectric generation module 29. Any position where a difference can be obtained may be used.
That is, the combustion temperature transmission unit 42 and the combustion temperature transmission unit 51 function as a combustion temperature transmission unit that transmits heat generated by combustion in the combustion chamber to the heating unit of the thermoelectric generator module.

  As described above, the pellet stove 40 can achieve the same operations and effects as the pellet stove 10 of the first embodiment. That is, at least one drive means (for example, the first blower fan 45, the second blower fan 46, and the screw-type pellet conveying device 33, which are electric drive means, using the heat generation power generated in the pellet stove 40 as a driving force (for example, , The drive motor) can be operated, and the electric power necessary for the initial operation of the pellet stove 10 can be supplied by providing the storage battery 30.

  In addition, although the said description was performed about the pellet stove 10 and 40 as an example of a combustion apparatus, as a combustion apparatus, it is not restricted to the pellet stove 10 and 40, The combustion function and thermoelectric generation module similar to the said pellet stove are provided. The present invention can also be applied to a combustion apparatus such as a boiler or a water heater provided. That is, at least a part of the electric drive means used in the combustion apparatus including a boiler or a water heater uses, as driving power, the heat generation power generated by the thermoelectric generation module that functions according to its own temperature in the heating state of the combustion apparatus. Can be driven.

(Third embodiment)
FIG. 9 is an explanatory view schematically showing a heat transfer method to the thermoelectric generator module according to the third embodiment of the present invention. As shown in FIG. 9, the thermoelectric generator module 29 is mounted on the outer periphery of a heat conduction pipe (combustion temperature transmission means) 53 that serves as a supply passage for steam (saturated steam) generated in a boiler (combustion device) 52. For example, a large combustion device used in a factory or the like transmits heat generated by combustion to the thermoelectric generator module 29.

  The boiler 52 includes a steam generation unit 54 that generates steam, and the supplied water can be stored in the steam generation unit 54 by supplying water, for example. The water stored in the steam generator 54 is heated with combustion in a combustion chamber (furnace) (not shown) to generate water vapor. The fuel (combustion material) to be combusted in the combustion chamber uses wood pellets P that are renewable and recyclable energy derived from biomass (plant resources). However, the present invention is not limited to this, and other fuels may be used. Good.

The heat conduction pipe 53 communicates with the steam generation unit 54 of the boiler 52, and water vapor (saturated water vapor) generated in the steam generation unit 54 is in a pressurized state when passing through the boiler 52 inside the pipe. Is heated to saturated steam or superheated steam at a predetermined temperature (about 200 ° C. to about 300 ° C.).
Here, saturated steam refers to steam that has evaporated at its boiling point, and superheated steam refers to heated saturated steam under a certain pressure.

For example, the pressure of the steam at which 280 ° C. becomes the saturation temperature is 6.32 MPa in gauge pressure, and the required temperature can be obtained by controlling the pressure. Therefore, the temperature of the saturated steam or superheated steam is the steam of the boiler 52 It can be adjusted by changing the amount of water supplied to the generator 54.
The portion of the heat conduction pipe 53 located outside the boiler 52 is mounted with the thermoelectric generation module 29 with the heating (heat absorption) side in contact with the heat conduction pipe 53 and is generated using the high heat of the boiler 52. When the saturated steam or superheated steam passes through the position where the thermoelectric generation module 29 is mounted inside the pipe, the heat of the superheated steam or saturated steam is transmitted to the heating (heat absorption) side of the thermoelectric generation module 29.

On the cooling (heat radiation) side of the thermoelectric generator module 29, for example, a cooling device such as a heat radiation portion 43 including a heat pipe 48 and a heat radiation fin 49 is attached (not shown).
As described above, since saturated steam or superheated steam at a predetermined temperature is used to transfer heat to the thermoelectric generator module 29, the characteristics of the heat conduction pipe 53 can be obtained by utilizing the characteristic that the steam can transfer heat uniformly. Substantially the same temperature can be transmitted to the respective heating (heat absorption) sides of the thermoelectric generator modules 29 installed in the longitudinal direction (three are shown as an example). The electric power generated by the thermoelectric generation module 29 to which heat has been transmitted is stored in the storage battery 30, and the electric power necessary for combustion of the boiler 52 from the storage battery 30 (for driving a fuel supply device, a fan for supply / exhaust / cooling, etc.) Power).

The saturated steam or superheated steam used for heat transfer passes through the position where the thermoelectric generation module 29 of the heat conducting pipe 53 is mounted, and then is supplied to the steam generating section 54 of the boiler 52 by radiating, cooling and liquefying. It can be reused or released directly into the room or the like and used for heating or drying the room.
The saturated steam or superheated steam at a predetermined temperature is not limited to the case where it is directly heated by a heat source (not shown) of the boiler 52 and may be generated by being heated by the exhaust of the boiler 52.

  FIG. 10 is an explanatory view schematically showing another example of a heat transfer method to the thermoelectric generator module. As shown in FIG. 10, a steam generation part 54 and a heat conduction pipe (combustion temperature transmission means) 55 that transmits saturated steam or superheated steam at a predetermined temperature are an exhaust pipe 52 a that serves as an exhaust passage of a boiler (combustion device) 52. The heat conduction pipe 55 is spirally formed in the vicinity of the communicating portion with the steam generating portion 54, and the thermoelectric generation module 29 is attached to a portion located outside the exhaust pipe 52a. Yes. Other configurations and operations are the same as in the case where the steam generation unit 54 is provided in the boiler 52 (see FIG. 9).

  By supplying water, for example, to the steam generation unit 54 disposed inside the exhaust pipe 52a, the water stored in the steam generation unit 54 is heated by the exhaust of the boiler 52 passing through the exhaust pipe 52a to generate water vapor. When the generated water vapor is inside the heat conduction pipe 55 and passes through the inside of the exhaust pipe 52a, the water vapor is heated under a pressurized state, so that a predetermined temperature (about 200 ° C. to about 300 ° C.) is obtained. Of saturated steam or superheated steam. Since the heat conduction pipe 55 is formed in a spiral shape, the hot air from the exhaust from the boiler 52 can be applied to the heat conduction pipe 55 over a long distance at a high temperature, so that the water vapor passing through the pipe can be reliably and It can be heated efficiently.

Saturated steam or superheated steam generated by using the exhaust gas from the boiler 52 passes through the position where the thermoelectric generation module 29 is mounted inside the heat conduction pipe 55, so that the heat of the superheated steam or saturated steam is increased. It is transmitted to the heating (heat absorption) side of the thermoelectric generator module 29.
Thus, in the combustion apparatus including the pellet stoves 10 and 40, the boiler 52, or the water heater, the power necessary for combustion in the combustion apparatus can be generated in the combustion apparatus itself. That is, at least a part of the electric drive means used in the combustion apparatus is driven by using the heat generation power generated by the thermoelectric generation module that functions according to the combustion temperature generated by the combustion apparatus itself in the combustion state of the combustion apparatus as the drive power. be able to.

  According to the present invention, it is possible to reliably supply fuel without using a commercial power supply that stops power supply due to a power failure or the like, and to contribute to measures against global warming when fuel is supplied. It is most suitable for a combustion apparatus having a combustion chamber, particularly a combustion apparatus for burning wood pellets as a combustion material in the combustion chamber.

DESCRIPTION OF SYMBOLS 10,40 Pellet stove 11 Stove body 11a Wall part 12 Fuel storage 12a Fuel inlet 13 Fuel supply path 13a Fire chamber opening 13b Fuel storage opening 14 Chimney 15 Exhaust fan 16 Hopper 16a Pellet discharge outlet 17 Lid 18 Partition wall 19, 44 Chamber 20 Ash tray 21 Rooster 22 Warm air delivery chamber 22a Blower port 23 Blower fan 24 Pellet guide unit 25 Drum-type pellet supply device 25a Drum 25b Receiving portion 26 Ignition heater 27 Air supply port 28 Air supply fan 29 Thermoelectric generator module 30 Storage battery 31 Combustion temperature conductor 32 Ambient temperature conductor 33 Screw type pellet conveying device 33a Screw shaft 33b Wing part 41 Battery storage part 41a Wall part 42, 51 Combustion temperature transmission part 42a Projection part 43 Heat radiation part 45 First blower fan 46 Second Blower fan 47 Road 48 heat pipe 49 radiating fin 50 attached member 52 Boiler 52a exhaust pipe 53, 55 heat conduction pipe 54 steam generating part P wood pellet S adjacent space

Claims (5)

A combustion chamber for burning the combustion material;
A thermoelectric power generation module that generates power based on a temperature difference generated by heating at a combustion temperature generated along with combustion in the combustion chamber and cooling at an external temperature of the combustion chamber;
A combustion apparatus, comprising: an electric drive unit that operates using a heat generation power generated by the thermoelectric generation module as a driving force.   2. The combustion apparatus according to claim 1, further comprising: a power storage device that stores electricity using thermal power generated by the thermoelectric generator module, wherein the power supplied from the power storage device is used as a driving force of the electric drive unit. .   The electric drive means includes a combustion material supply device for supplying the combustion material from a combustion material storage to the combustion chamber, a fan for supplying or exhausting air to the combustion chamber, and heated air in the combustion chamber. The combustion apparatus according to claim 1, wherein the combustion apparatus is at least one of the fans to be sent out.   The combustion apparatus according to any one of claims 1 to 3, further comprising combustion temperature transmission means for transmitting heat generated by combustion in the combustion chamber to a heating unit of the thermoelectric generator module.   The combustion apparatus according to any one of claims 1 to 4, wherein the combustion material is a wood pellet.

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