JP4822794B2 - Combustion device - Google Patents

Description

  The present invention relates to a combustion apparatus.

  Conventionally, a combustion apparatus that burns solid fuel such as wood pellets on a combustion dish provided in a combustion chamber is known (see, for example, Patent Document 1). In such a combustion apparatus, the solid fuel is supplied to the central portion of the combustion dish and is moved to the outer peripheral side of the combustion dish by the newly supplied solid fuel. Is fitted with a rotating ring that holds solid combustion. A gap is formed between the rotating ring and the combustion dish. When the rotating ring rotates with respect to the combustion dish, solid fuel or unburned matter burned on the combustion dish to become ash (so-called “clinker”) However, it is the structure discharged | emitted from the said clearance gap.

However, when the gap is large, solid fuel before complete combustion is discharged, but when the gap is small, there is a problem that ash and clinker are not discharged well.
JP 2004-293828 A

  In view of the above facts, an object of the present invention is to provide a combustion apparatus that can burn solid fuel on a combustion dish satisfactorily, and that can well discharge ash and unburned matter.

In order to solve the above problem, a combustion apparatus according to a first aspect of the present invention includes a combustion dish in which a solid fuel is supplied to a central portion and the supplied solid fuel is burned while being moved to an outer peripheral side, A holding member having a wall portion provided along an outer peripheral portion of the combustion dish, and a fuel discharge port provided in a part of the wall portion; provided around the wall portion; An opening / closing member that opens and closes the fuel discharge port by relative rotation and a drive mechanism that rotates the opening / closing member are provided.

In the combustion apparatus according to claim 1, in a state where the fuel discharge port of the holding member provided on the outer peripheral portion of the combustion dish is closed by the opening / closing means, the solid fuel moved to the outer peripheral part of the combustion dish is transferred to the holding member . It is held by the provided wall and burns well on the combustion dish to become ash. When the opening / closing member is rotated relative to the holding member by the driving mechanism, when the fuel discharge port of the holding member is opened, solid fuel ash and unburned matter are discharged from the fuel discharge port.

In addition, since the fuel discharge port is formed in a part of the wall portion provided in the holding member , the structure is simple.

Furthermore, since the fuel discharge port can be opened and closed simply by rotating the open / close member relative to the holding member by the drive mechanism, the configuration is simple.

A combustion apparatus according to a second aspect of the present invention is the combustion apparatus according to the first aspect , wherein the holding member is provided to be rotatable relative to the combustion dish, and the opening / closing member is rotated relative to the holding member. The fuel outlet is restricted within a predetermined range, and the fuel discharge port is closed when rotating relative to the holding member in one direction, and the fuel discharging port when rotating relative to the holding member in the other direction. It is characterized by opening the outlet.

In the combustion apparatus according to the second aspect , when the opening / closing member is rotated relative to the holding member in one direction by the drive mechanism, the fuel discharge port of the holding member is closed by the opening / closing member. When the relative rotation of the opening / closing member with respect to the holding member is restricted, the holding member integrally rotates with the opening / closing member in one direction relative to the combustion dish. As a result, the solid fuel on the outer periphery of the combustion dish is agitated by the holding member, and good combustion is maintained.

  On the other hand, when the opening / closing member is rotated relative to the holding member in the other direction by the drive mechanism, the fuel discharge port of the holding member is opened by the opening / closing member. When the relative rotation of the opening / closing member with respect to the holding member is restricted, the holding member integrally rotates with the opening / closing member in the other direction relative to the combustion dish, and the opened fuel discharge port rotates around the combustion dish. . Thereby, the ash and unburned matter of the solid fuel on the outer periphery of the combustion dish are discharged well from the fuel discharge port.

A combustion apparatus according to a third aspect of the present invention is the combustion apparatus according to the second aspect , wherein the holding member has a protrusion protruding toward the inner peripheral side of the combustion dish.

In the combustion apparatus according to claim 3 , when the holding member rotates relative to the combustion dish, the protrusion provided on the holding member agitates the solid fuel on the outer periphery of the combustion dish. Combustion is separated and good combustion is maintained.

A combustion apparatus according to a fourth aspect of the invention is characterized in that, in the combustion apparatus of the third aspect , the protrusion is provided in the vicinity of an end portion on the one-direction side of the fuel discharge port.

5. The combustion apparatus according to claim 4 , wherein when the holding member rotates relative to the combustion dish in the other direction, that is, when the fuel discharge port is opened by the opening / closing member, the end on one side of the fuel discharge port. Since the ash and unburned matter on the outer periphery of the combustion dish are pushed out to the fuel discharge port side and discharged by the protrusion provided in the vicinity of the portion, the discharge efficiency of ash and unburned matter is improved.

A combustion apparatus according to a fifth aspect of the present invention is the combustion apparatus according to the third or fourth aspect , wherein the protrusion is formed such that an end on the one-direction side is inclined with respect to a radial direction of the combustion dish. It is characterized by being.

6. The combustion apparatus according to claim 5 , wherein when the holding member rotates relative to the combustion dish in one direction, that is, when the fuel discharge port is closed by the opening / closing member, the end on the one direction side is the combustion dish. Since the solid fuel on the outer periphery of the combustion dish is gently agitated by the protrusions formed to be inclined with respect to the radial direction, it is possible to suppress unnecessarily disturbing the combustion of the solid fuel.

  As described above, according to the combustion apparatus of the present invention, the solid fuel on the combustion dish can be combusted satisfactorily, and ash and unburned matter can be discharged well.

  FIG. 1 is a side sectional view showing a configuration of a combustion apparatus 10 according to an embodiment of the present invention. Further, FIG. 2 shows a side sectional view of the structure of the combustion section 16 constituting the combustion apparatus 10.

  The combustion apparatus 10 is a boiler and includes a casing 12 that constitutes an apparatus main body. A combustion chamber 14 is provided inside the housing 12, and a combustion unit 16 is provided at the lower part of the housing 12.

  The combustion section 16 includes a rooster section 18 disposed in the combustion chamber 14 and a case 20 disposed outside the casing 12. A hopper 22 serving as a fuel tank is provided inside the case 20. Is provided. Inside the hopper 22 is stored a solid fuel P made by pulverizing and compressing thinned wood. As the solid fuel P, high-quality pellets made of wood (so-called “white pellets”), low-quality pellets made of wood bark (so-called “black pellets”), etc. are used. The

  Below the hopper 22, a fuel transfer pipe 24 formed in a cylindrical shape is disposed horizontally. The inside of the fuel transfer pipe 24 and the inside of the hopper 22 communicate with each other, and the solid fuel P stored in the hopper 22 falls into the fuel transfer pipe 24. A fuel transfer screw 26 is disposed in the fuel transfer pipe 24. An output shaft 30 of a motor 28 is connected to one end in the axial direction of the fuel conveyance screw 26, and the fuel conveyance screw 26 is rotated by a driving force of the motor 28. As a result, the solid fuel P that has fallen into the fuel transfer pipe 24 is transferred by the fuel transfer screw 26 to one end side in the axial direction of the fuel transfer pipe 24 (left side in FIGS. 1 and 2). As shown in FIG. 6, the motor 28 is connected to the control circuit 32 and is driven by the control circuit 32 when the switch 34 connected to the control circuit 32 is operated to be turned on. ing.

  As shown in FIG. 1, one axial end side of the fuel transfer pipe 24 extends through the through hole 36 formed in the side wall of the housing 12 to the rooster portion 18 in the combustion chamber 14. Also, as shown in FIG. 3, one end portion in the axial direction of the fuel transfer pipe 24 is bent vertically upward, and a support portion 38 is formed. The support portion 38 is formed in a disc shape and coaxially penetrates the central portion of the base 40 constituting the rooster portion 18, and the base 40 is fixed to the support portion 38.

  A rooster 42 as a combustion dish is attached to the upper portion of the base 40. As shown in FIGS. 4 and 5, the rooster 42 is formed in a conical shape having a high central portion and a low outer peripheral portion. The tip of the support portion 38 passes through the central portion of the rooster 42 coaxially, and the opening 38A at the tip of the support portion 38 is exposed above the rooster 42. For this reason, the solid fuel P transported to one end side in the axial direction of the fuel transport pipe 24 is discharged from the opening 38 </ b> A at the tip of the support portion 38, supplied to the central portion of the upper surface of the rooster 42, and newly supplied. It is configured to be moved to the outer peripheral side of the upper surface of the rooster 42 by the solid fuel P.

  An inner ring 44 as a holding member is placed on the outer peripheral portion of the upper surface of the rooster 42. The inner ring 44 is formed in a cylindrical shape having a short axial dimension, and is disposed coaxially with the rooster 42 (that is, disposed along the outer peripheral portion of the rooster 42), and the wall portion 45. And a flange portion 46 protruding outward in the radial direction of the wall portion 45. The inner ring 44 is rotatable relative to the rooster 42 and holds the solid fuel P moved to the outer peripheral side of the upper surface of the rooster 42 by the wall 45.

  Here, in the combustion apparatus 10 according to the present embodiment, the solid fuel P on the rooster 42 is ignited in a state where the solid fuel P is supplied to the upper surface of the rooster 42. The solid fuel P supplied above is ignited by the solid fuel P combusted on the rooster 42. As shown in FIG. 2, new solid fuel P is supplied to the center of the upper surface of the rooster 42 by the rotation of the fuel transfer screw 26, so that the solid fuel P on the rooster 42 is It is configured to burn mainly at the outer peripheral portion of the upper surface of the rooster 42 while being moved to the side.

  As shown in FIGS. 4 and 5, the flange portion 46 is formed with a pair of notches 48. The pair of notches 48 are formed on opposite sides of each other via the axis of the wall portion 45, that is, on the opposite sides 180 degrees along the circumferential direction of the wall portion 45.

  Further, a pair of inner fuel discharge ports 50 are formed in the wall portion 45. The pair of inner fuel discharge ports 50 are formed on opposite sides of each other via the axis of the wall portion 45, that is, on the opposite side 180 degrees along the circumferential direction of the wall portion 45.

  In addition, as shown in FIG. 6, a pair of scraping claws 52 as protrusions are provided in the inner peripheral portion of the wall portion 45 in the vicinity of the pair of inner fuel discharge ports 50 (near the end portion on the arrow A direction side). Is formed. The pair of scraping claws 52 protrude to the inner peripheral side of the wall portion 45 (that is, the inner peripheral side of the rooster 42), and one end portion along the circumferential direction of the wall portion 45 (an end portion on the arrow B direction side). ) Is a scraped surface 54 formed along the radial direction of the wall portion 45 (that is, the radial direction of the rooster 42), and the other end portion (the end portion on the arrow A direction side) along the circumferential direction of the wall portion 45. ) Is an inclined surface 56 formed to be inclined with respect to the radial direction of the wall portion 45.

  On the other hand, an outer ring 58 as an opening / closing member formed in a cylindrical shape having a short axial dimension is provided around the wall portion 45 of the base 40, the rooster 42 and the inner ring 44. A ring-shaped engaging portion 60 that protrudes inward in the radial direction of the outer ring 58 is formed on the upper inner periphery of the outer ring 58. The engaging portion 60 engages with the outer peripheral edge of the upper surface of the rooster 42. The outer ring 58 is supported so as to be coaxial and relatively rotatable with respect to the rooster 42 and the base 40.

  A pair of drive claws 62 projecting upward are formed at the upper end of the outer ring 58. The pair of drive claws 62 are formed on opposite sides of each other via the axis of the outer ring 58, that is, on opposite sides 180 degrees along the circumferential direction of the outer ring 58, and in the pair of notches 48 of the inner ring 44. Has been placed. The pair of drive claws 62 are formed so that the length dimension along the circumferential direction of the outer ring 58 is shorter than the length dimension of the pair of notches 48 along the circumferential direction of the inner ring 44.

  For this reason, the outer ring 58 and the inner ring 44 can be rotated relative to each other within a range in which the pair of driving claws 62 can move in the pair of cutouts 48, and the pair of driving claws 62 are arranged in the circumferential direction of the inner ring 44. The relative rotation is limited by abutting against the end portions of the pair of notches 48 along the axis.

  In addition, when the outer ring 58 rotates with the pair of drive claws 62 in contact with the ends of the pair of notches 48 as described above, the inner ring 44 is integrated with the outer ring 58 with respect to the base 40 and the rooster 42. Are configured to rotate relative to each other.

  Furthermore, a pair of outer fuel discharge ports 64 are formed in the outer ring 58. The pair of outer fuel discharge ports 64 are formed on opposite sides with respect to each other via the axis of the outer ring 58, that is, on the opposite sides 180 degrees along the circumferential direction of the outer ring 58.

  In the pair of outer fuel discharge ports 64, the outer ring 58 rotates relative to the inner ring 44 in the other direction (arrow B direction), and the pair of drive claws 62 has one circumferential end of the pair of notches 48 (arrow B). In the state of contact with the end portion on the direction side, as shown in FIG. 6, the pair of inner fuel discharge ports 50 overlap with the pair of inner fuel discharge ports 50 of the inner ring 44, and the pair of inner fuel discharge ports 50 are opened. . Note that the size of the pair of inner fuel discharge ports 50 and the pair of outer fuel discharge ports 64 is determined by the solid fuel ash generated on the rooster 42 or unburned matter (so-called “clinker”, in FIG. Is set to a size that can be discharged satisfactorily.

  On the other hand, the outer ring 58 rotates relative to the inner ring 44 in one direction (arrow A direction), and the pair of drive claws 62 has the other circumferential end of the pair of notches 48 (the end on the arrow A direction side). 7), the pair of outer fuel discharge ports 64 are displaced with respect to the pair of inner fuel discharge ports 50, so that the pair of inner fuel discharge ports 50 of the inner ring 44 are removed as shown in FIG. The ring 58 is closed.

  On the other hand, a drive shaft 66 constituting a drive mechanism is provided below the outer ring 58. The drive shaft 66 is axially supported by a support plate 68 attached to the fuel conveyance pipe 24 at one end in the axial direction, and is supported by a support plate (not shown) attached to the case 20 at the other end in the axial direction. . Further, an output shaft 72 of a motor 70 (see FIG. 6) disposed in the case 20 and constituting a drive mechanism is connected to the other axial end of the drive shaft 66, and the drive shaft 66 is connected to the motor. It is rotated by a driving force of 70.

  The motor 70 is connected to the control circuit 32 described above, and is driven by the control circuit 32 when the switch 34 is turned on. Although details will be described later, the control circuit 32 is configured to rotate the output shaft 72 of the motor 70 forward or backward in accordance with a stored predetermined control program.

  A drive screw 74 is fixed to one end side of the drive shaft 66 in the axial direction, and the drive screw 74 is engaged with a plurality of drive teeth 75 formed at the lower end portion of the outer ring 58. ing. The plurality of drive teeth 75 are arranged at equal intervals along the circumferential direction at the lower end portion of the outer ring 58, and when the drive screw 74 rotates with the drive shaft 66, the rotational force of the drive screw 74 is applied to the outer ring 58. As a result, the outer ring 58 rotates.

  In this case, when the output shaft 72 of the motor 70 rotates forward so that the drive shaft 66 rotates around the axis together with the drive screw 74, the outer ring 58 rotates in one direction (arrow A direction), and the output shaft of the motor 70 When the drive shaft 66 rotates together with the drive screw 74 to the other side by rotating in the reverse direction 72, the outer ring 58 is rotated in the other direction (arrow B direction).

  On the other hand, as shown in FIG. 6, a blower 76 is provided in the case 20 of the combustion unit 16. The blower 76 is connected to the control circuit 32 described above. When the switch 34 is turned on, the blower 76 is driven by the control circuit 32 and blows air into the supply pipe 77 whose proximal end is attached to the side wall of the case 20. To do. The front end side of the air supply pipe 77 is connected to the lower part of the base 40, and the air blown into the air supply pipe 77 is blown to the lower surface of the rooster 42 through a vent hole (not shown) formed in the base 40. It is done. A plurality of slit-shaped vent holes 78 are formed radially in the rooster 42, and the air blown to the lower surface of the rooster 42 passes through the plurality of vent holes 78 and is discharged to the upper surface side of the rooster 42. It is like that. Thereby, combustion of the solid fuel P on the rooster 42 is promoted.

  As shown in FIG. 1, the high-temperature combustion gas generated in the combustion chamber 14 by the combustion of the solid fuel P heats adjacent to the combustion chamber 14 through a gas discharge port 79 formed in the upper portion of the combustion chamber 14. It is sent to the exchange unit 80 (see arrow C in FIG. 1). The heat exchange unit 80 is provided with a plurality of cylindrical heat exchange tubes 82, and the combustion gas sent to the heat exchange unit 80 flows through the plurality of heat exchange tubes 82. The water stored in the water storage section 84 provided at the top of the housing 12 is supplied to the outer periphery of the plurality of heat exchange tubes 82 via a pipe (not shown). The combustion gas flowing inside is configured to exchange heat with water flowing outside the heat exchange cylinder 82.

  The air discharged from the heat exchanging cylinder 82 is erected on the side of the housing 12 via an ash reservoir 86 provided below the heat exchanging unit 80 (see arrows D and E in FIG. 1). Is sent into the chimney 88 and discharged from the top of the chimney 88 (see arrows F and G in FIG. 1).

  Next, the operation of the present embodiment will be described.

  In the combustion apparatus 10 having the above configuration, when the switch 34 is operated and turned on, the motor 28 is driven by the control means, and the fuel conveying screw 26 is rotated. As a result, the solid fuel P in the supply hopper 22 is supplied to the center of the upper surface of the rooster 42 through the fuel transport pipe 24. When the solid fuel P on the rooster 42 is ignited in this state, the solid fuel P that burns on the rooster 42 is newly supplied to the center of the upper surface of the rooster 42 by the rotation of the fuel conveying screw 26. While being moved to the outer peripheral portion of the upper surface of the rooster 42, combustion is mainly performed at the outer peripheral portion of the upper surface of the rooster 42.

  At this time, the control circuit 32 drives the blower 76. When the blower 76 is driven, air is discharged to the upper surface side of the rooster 42 through the air supply pipe 77, the vent hole (not shown) of the base 40, and the vent hole 78 of the rooster 42, and the solid fuel P on the rooster 42 is discharged. Combustion is promoted.

  Further, at this time, the control circuit 32 causes the output shaft 72 of the motor 70 to rotate forward. As a result, the drive shaft 66 is rotated around the axis together with the drive screw 74, and the outer ring 58 is rotated in one direction (arrow A direction). As a result, when the pair of driving claws 62 of the outer ring 58 come into contact with the other circumferential end of the inner ring 44 (the end on the arrow A direction side), the pair of inner fuel discharge ports 50 of the inner ring 44 are removed. It is occluded by the ring 58. As a result, the solid fuel P on the rooster 42 is held on the wall 45 of the inner ring 44 together with the ash and clinker K generated on the rooster 42 by the combustion of the solid fuel P.

  Further, in this state, when the outer ring 58 is rotated in one direction, the inner ring 44 is rotated in one direction integrally with the outer ring 58, and the solid fuel P along the inner periphery of the upper surface of the rooster 42, that is, the wall 45. Is stirred by the inclined surface 56 of the scraping claw 52 provided on the inner peripheral portion of the wall portion 45. Thereby, the solid fuel P is separated from the ash and the clinker K, and good combustion of the solid fuel P is maintained. In addition, in this case, since the solid fuel P is gently stirred by the inclined surface 56 of the scraping claw 52, the combustion of the solid fuel P can be prevented from being disturbed unnecessarily.

  When the control circuit 32 rotates the output shaft 72 of the motor 70 in a forward direction, a predetermined time elapses (for example, it is necessary for the inner ring 44 to be integrated with the outer ring 58 and make a half or one turn around the rooster 42. When time elapses), the forward rotation of the output shaft 72 is stopped.

  Furthermore, the control circuit 32 reverses the output shaft of the motor 70 when a predetermined interval time has elapsed since the output shaft 72 of the motor 70 was stopped. As a result, the drive shaft 66 is rotated around the axis together with the drive screw 74, and the outer ring 58 is rotated in the other direction (arrow B direction). As a result, when the pair of driving claws 62 of the outer ring 58 come into contact with the other circumferential end of the inner ring 44 (the end on the arrow B direction side), the pair of inner fuel discharge ports 50 of the inner ring 44 and the outer The pair of outer fuel discharge ports 64 of the ring 58 overlap, and the pair of inner fuel discharge ports 50 are opened.

  In this state, when the outer ring 58 is further rotated in the other direction, the inner ring 44 is integrally rotated with the outer ring 58 in the other direction. For this reason, ash and clinker K along the outer periphery of the upper surface of the rooster 42, that is, along the inner periphery of the wall 45, are paired with the pair of inner fuel discharge ports 50 by the scraping surface 54 of the scraping claw 52 provided on the inner periphery of the wall 45. It is pushed out to the side and discharged from above the rooster 42 via the pair of inner fuel discharge ports 50 and the pair of outer fuel discharge ports 64. Thus, since the ash and clinker K are actively scraped by the scraping surface 54 of the scraping claw 52, the discharge effect of the ash and clinker K is improved, and a good fuel of the solid fuel P is maintained.

  When the control circuit 32 reverses the output shaft 72 of the motor 70 for a predetermined time (for example, the time required for the inner ring 44 and the outer ring 58 to be integrated with the outer ring 58 half or one round). When the time elapses), the reverse rotation of the output shaft 72 is stopped, and after the elapse of a predetermined interval time, the output shaft 72 of the motor 70 is rotated forward again and the above-described processing is repeated.

  By the way, in the conventional combustion apparatus explained in the background art section, when the solid fuel to be used is so-called white pellets, there is little generation of ash and clinker. (Cleanability) is also good, but when the solid fuel used is so-called black pellets, ash and clinker are often generated, so they remain on the rooster 42, and the combustibility and cleanability are poor. There was a problem.

  In this regard, in the combustion apparatus 10 according to the present embodiment, since the pair of inner fuel discharge ports 50 of the inner ring 44 are configured to be appropriately opened and closed by the outer ring 58, the size of the pair of inner fuel discharge ports 50 is reduced. Even when the ash and clinker K emission properties are improved by setting a large value, it is possible to prevent unnecessary discharge of the solid fuel before complete combustion. Therefore, it can sufficiently cope with solid fuels such as black pellets, in which ash and clinker are frequently generated.

  As described above, in the combustion apparatus 10 according to the embodiment of the present invention, the solid fuel P on the rooster 42 can be combusted satisfactorily and ash and clinker K can be discharged well.

  In the combustion apparatus 10 according to the embodiment of the present invention, since the inner fuel discharge port 50 is formed in a part of the wall portion 45 of the inner ring 44 that holds the solid fuel P on the rooster 42, The structure is simple.

  Furthermore, in the combustion apparatus 10 according to the embodiment of the present invention, the inner fuel discharge port 50 can be opened and closed only by rotating the outer ring 58 relative to the inner ring 44, so that the configuration is simple.

  In the combustion apparatus 10 according to the above embodiment, the outer ring 58 rotates relative to the inner ring 44 so that the inner fuel discharge port 50 of the inner ring 44 is opened and closed. For example, the outer ring 58 is omitted, the inner ring 44 is directly driven to rotate by a drive mechanism such as the drive shaft 66 and the drive screw 74, and the member attached to the inner fuel discharge port 50 of the inner ring 44 is The inner fuel discharge port 50 may be opened and closed by being moved up and down by a cam or the like as the ring 44 rotates.

  Moreover, although the combustion apparatus 10 which is a boiler was demonstrated in the said embodiment, the combustion apparatus which concerns on this invention can also be comprised as a heater (what is called a "pellet stove").

It is a longitudinal section showing a schematic structure of a combustion device concerning an embodiment of the invention. It is a longitudinal cross-sectional view which shows the structure of the combustion part of the combustion apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the rooster part which comprises the combustion part of the combustion apparatus which concerns on embodiment of this invention. It is a perspective view which shows the structure of the rooster part which comprises the combustion part of the combustion apparatus which concerns on embodiment of this invention. It is a perspective view which shows the structure of the combustion part of the combustion apparatus which concerns on embodiment of this invention. It is a top view which shows the structure of the combustion part of the combustion apparatus which concerns on embodiment of this invention, and shows the state by which the fuel discharge port of the holding member was open | released by the opening-and-closing member. It is a top view which shows the structure of the combustion part of the combustion apparatus which concerns on embodiment of this invention, and shows the state by which the fuel discharge port of the holding member was obstruct | occluded by the opening / closing member.

Explanation of symbols

10 Combustion device
42 Rooster (combustion dish)
44 Inner ring (holding member)
45 Wall
50 Inner fuel outlet (fuel outlet)
52 Raised nail (protrusion)
56 Inclined surface
58 Outer ring (opening / closing member, opening / closing means)
64 Outer fuel outlet
66 Drive shaft (drive mechanism, opening / closing means)
70 Motor (drive mechanism, opening / closing means)
74 Drive screw (drive mechanism, opening / closing means)

Claims (5)

A combustion dish in which solid fuel is supplied to the central portion and the supplied solid fuel is burned while being moved to the outer peripheral side;
A holding member having a wall portion provided along an outer peripheral portion of the combustion dish, and a fuel discharge port provided in a part of the wall portion ;
An opening / closing member provided around the wall portion and opening / closing the fuel discharge port by rotating relative to the holding member;
A drive mechanism for rotating the opening and closing member;
Combustion device equipped with. The holding member is provided so as to be relatively rotatable with respect to the combustion dish , and the opening / closing member is limited in relative rotation with respect to the holding member within a predetermined range, and is relative to the holding member in one direction. upon rotating and closing the fuel outlet, the time of relative rotation in the other direction relative to the holding member combustion apparatus according to claim 1, wherein that you open the fuel outlet. The combustion apparatus according to claim 2 , wherein the holding member has a protrusion protruding toward an inner peripheral side of the combustion dish . The protrusions combustion apparatus according to claim 3, wherein Rukoto provided in the vicinity of an end of the one direction side of the fuel outlet. The protrusions combustion apparatus according to claim 3, wherein or claim 4, wherein the end portion of the one-way side, characterized that you have been formed to be inclined with respect to the radial direction of the combustion dish.

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