JP2022001805A - Wood pellet combustion device - Google Patents

Abstract

To suitably extinguish burning wood pellets present in a combustion chamber.SOLUTION: In a pellet stove 10 in an operational condition, wood pellets 18 in a combustion furnace 30 of a combustion chamber 24 are burned. According to the resumption of power supply to the pellet stove 10 subsequent to stop of the power supply to the pellet stove 10 in an operational condition, air is fed into the combustion furnace 30. Hence, the wood pellets 18 in the combustion furnace 30 can be suitably and totally burned, and the burning wood pellets 18 in the combustion furnace 30 can be suitably extinguished.SELECTED DRAWING: Figure 2

Description

The present invention relates to a wood pellet combustion device in which wood pellets in a combustion chamber are burned.

In the hot air heating device described in Patent Document 1 below, wood pellets are burned in the combustion chamber while the exhaust fan blows air into the combustion chamber.

By the way, since the wood pellet is a solid substance, it is more difficult to extinguish the fire of the wood pellet than the gas fuel and the liquid fuel.

Therefore, in this hot air heating device, when the power supply is stopped due to a power failure or the like and the exhaust fan is stopped, all the wood pellets in the combustion chamber are burned while the air is naturally ventilated to the combustion chamber. The wood pellets are extinguished.

Utility Model Registration No. 3155768 Gazette

In consideration of the above facts, the present invention can appropriately extinguish the wood pellets in the combustion chamber when the electric power is supplied to the operating mechanism after the electric power supply to the operating mechanism is stopped while the operating mechanism is operated. The purpose is to obtain a wood pellet combustion device.

The wood pellet combustion apparatus according to claim 1 is operated in a combustion chamber in which wood pellets are burned to heat air and a state in which power is supplied to burn the wood pellets in the combustion chamber and operate. It is provided with an operating mechanism for blowing air to the combustion chamber based on the fact that the power is supplied after the power supply is stopped in the state of being supplied.

The wood pellet combustion apparatus according to claim 2 is the wood pellet combustion apparatus according to claim 1, wherein the operating mechanism supplies wood pellets to the combustion chamber and ignites the wood pellets in the combustion chamber. The operating mechanism blows air into the combustion chamber based on the fact that the operating mechanism is supplied with power after the supply of electric power to the operating mechanism is stopped.

The wood pellet combustion apparatus according to claim 3 is the wood pellet combustion apparatus according to claim 1 or 2, wherein the operating mechanism supplies wood pellets to the combustion chamber and the wood pellets in the combustion chamber are burned. In this state, the operating mechanism blows air into the combustion chamber based on the fact that the power is supplied to the operating mechanism after the supply of electric power to the operating mechanism is stopped.

The wood pellet combustion apparatus according to claim 4 is the wood pellet combustion apparatus according to any one of claims 1 to 3, wherein the operating mechanism ends the supply of the wood pellets to the combustion chamber. The operating mechanism blows air into the combustion chamber based on the fact that power is supplied to the operating mechanism after the supply of electric power to the operating mechanism is stopped in a state where air is blown into the combustion chamber.

The wood pellet combustion device according to claim 5 is the wood pellet combustion device according to any one of claims 1 to 4, wherein the operation mechanism is used when the supply of electric power to the operation mechanism is stopped. The state of is memorized.

In the wood pellet combustion apparatus according to claim 1, the wood pellets are burned in the combustion chamber and the air is heated by operating the operation mechanism in a state where electric power is supplied to the operation mechanism.

Here, the operating mechanism blows air into the combustion chamber based on the fact that the electric power is supplied to the operating mechanism after the supply of electric power to the operating mechanism is stopped in the state where the operating mechanism is operated. Therefore, all the wood pellets in the combustion chamber can be burned satisfactorily, and the wood pellets in the combustion chamber can be appropriately extinguished.

In the wood pellet combustion apparatus according to claim 2, the operating mechanism supplies the wood pellets to the combustion chamber and ignites the wood pellets in the combustion chamber, and after the power supply to the operating mechanism is stopped, the power is supplied to the operating mechanism. The actuating mechanism blows air into the combustion chamber based on the supply. Therefore, the wood pellets in the combustion chamber can be appropriately extinguished after the supply of electric power to the operating mechanism is stopped while the operating mechanism supplies the wood pellets to the combustion chamber and ignites the wood pellets in the combustion chamber.

In the wood pellet combustion apparatus according to claim 3, the operating mechanism supplies the wood pellets to the combustion chamber, and the operating mechanism is supplied with power after the wood pellets in the combustion chamber are burned and the supply of power to the operating mechanism is stopped. Based on the power being supplied, the actuating mechanism blows air into the combustion chamber. Therefore, after the operating mechanism supplies the wood pellets to the combustion chamber and the supply of electric power to the operating mechanism is stopped while the wood pellets in the combustion chamber are burned, the wood pellets in the combustion chamber can be appropriately extinguished.

In the wood pellet combustion apparatus according to claim 4, the operation mechanism is operated after the operation mechanism ends the supply of the wood pellets to the combustion chamber and the supply of power to the operation mechanism is stopped while air is being blown into the combustion chamber. The actuating mechanism blows air into the combustion chamber based on the power supplied to the combustion chamber. Therefore, the wood pellets in the combustion chamber can be appropriately extinguished after the operating mechanism ends the supply of the wood pellets to the combustion chamber and the power supply to the operating mechanism is stopped while air is being blown into the combustion chamber. ..

In the wood pellet combustion device according to claim 5, the state of the operating mechanism when the supply of electric power to the operating mechanism is stopped is stored. Therefore, it is possible to confirm the state of the operating mechanism when the supply of electric power to the operating mechanism is stopped.

It is a perspective view seen from the diagonally right front which shows the pellet stove which concerns on embodiment of this invention. It is sectional drawing seen from the right side which shows the pellet stove which concerns on embodiment of this invention. It is sectional drawing seen from the front which shows the pellet stove which concerns on embodiment of this invention.

FIG. 1 shows a perspective view of a pellet stove 10 as a wood pellet combustion device according to an embodiment of the present invention as viewed diagonally from the front to the right. Further, FIG. 2 shows a cross-sectional view of the pellet stove 10 seen from the right side, and FIG. 3 shows a cross-sectional view of the pellet stove 10 seen from the front. In the drawing, the front of the pellet stove 10 is indicated by an arrow FR, the left side of the pellet stove 10 is indicated by an arrow LH, and the upper portion is indicated by an arrow UP.

The pellet stove 10 according to the present embodiment is a closed type (FF type) and is installed in the room (installation space) of the building.

As shown in FIGS. 1 to 3, the pellet stove 10 is provided with a substantially rectangular parallelepiped box-shaped housing 12, and the housing 12 constitutes the outer surface of the pellet stove 10. A vent 14 is formed through the lower portion of the rear wall of the housing 12, and the vent 14 opens the inside of the housing 12 into the room on the rear side of the housing 12.

A funnel-shaped hopper 16 as an accommodating portion is provided on the upper portion of the rear portion of the housing 12, and the inside of the hopper 16 is open to the upper side. A substantially plate-shaped hopper lid 16A is provided on the upper side of the hopper 16, and the hopper lid 16A closes the inside of the hopper 16 from the upper side. The hopper lid 16A is rotatable, and the hopper lid 16A is rotated upward to open the inside of the hopper 16 upward. For example, a columnar wood pellet 18 which is a processing fuel is housed in the hopper 16, and the wood pellet 18 is manufactured by crushing and compressing thinned wood or the like.

A supply screw 20 as a supply means constituting the operating mechanism is fixed to the lower side of the hopper 16. The supply screw 20 is provided with a cylindrical transport cylinder 20A, and the axial direction of the transport cylinder 20A is inclined upward as it goes forward. The lower end of the hopper 16 communicates with the lower end (rear end) of the transport cylinder 20A, and the wood pellet 18 in the hopper 16 flows down to the lower end of the transport cylinder 20A. A screw 20B is coaxially provided in the transport cylinder 20A, and a supply motor 20C as a supply drive means is connected to the lower end (rear end) of the screw 20B. The supply motor 20C is electrically connected to the control device 80 constituting the operating mechanism, and the supply motor 20C is driven by the control of the control device 80 to rotate the screw 20B in the transport cylinder 20A. The wood pellet 18 is transported to the upper side (front side). A supply cylinder 20D is connected to the upper end portion (front end portion) of the transport cylinder 20A, and the axial direction of the supply cylinder 20D is inclined downward as it goes forward. The upper end portion (rear end portion) in the supply cylinder 20D is communicated with the upper end portion in the transport cylinder 20A, and the wood pellet 18 conveyed to the upper end portion in the transport cylinder 20A flows forward in the supply cylinder 20D. Will be done.

A rectangular parallelepiped combustion chamber 24 is provided in the front portion of the housing 12, and the supply cylinder 20D of the supply screw 20 is penetrated through the rear wall of the combustion chamber 24. A long rectangular heating hole 26 is formed through the upper ends of the left wall and the right wall of the combustion chamber 24, and the heating hole 26 is extended in the front-rear direction. A rectangular annular seal wall 12A (see FIG. 2) as a seal portion is provided in the vicinity of the front end portion of the housing 12 on the entire circumference of the front side of the combustion chamber 24, and the seal wall 12A is formed into a flat plate shape. And are arranged vertically in the front-back direction.

A substantially rectangular plate-shaped opening / closing door 22 is provided at the front end of the housing 12, and the opening / closing door 22 is closed to form a front wall of the housing 12 and a front wall (peripheral wall) of the combustion chamber 24. is doing. The opening / closing door 22 and the sealing wall 12A of the housing 12 are sealed, and the opening / closing door 22 closes the front side of the combustion chamber 24. The opening / closing door 22 is rotatable around the left end portion, and the opening / closing door 22 is rotated forward to be openable.

A rectangular parallelepiped box-shaped combustion box 28 is provided in the lower portion on the rear side of the combustion chamber 24, and the rear wall of the combustion box 28 is the rear wall of the combustion chamber 24. A rectangular box-shaped combustion furnace 30 as a combustion part is provided on the front side and the upper part of the combustion box 28, and the front wall, the left wall, and the right wall of the combustion furnace 30 are in front of the combustion box 28, respectively. It is made into a wall, a left wall and a right wall, and the inside of the combustion furnace 30 is opened to the upper side of the combustion box 28. The lower wall and the rear wall of the combustion furnace 30 are made into a rostrum 30A, and a large number of air holes 32 are formed through the rostrum 30A. The front end (lower end) of the supply cylinder 20D of the supply screw 20 is arranged on the upper side in the combustion furnace 30, and the wood pellet 18 flowing forward in the supply cylinder 20D is flowed down into the combustion furnace 30 and supplied. Will be done. Further, the portion outside the combustion furnace 30 in the combustion box 28 is made into an air supply chamber 34.

An ignition cylinder 36 is connected to the rear wall of the combustion furnace 30, and the inside of the ignition cylinder 36 is communicated with the inside of the combustion furnace 30 and is penetrated through the rear wall of the combustion chamber 24 to be rearward from the combustion chamber 24. It has been extended to. An ignition heater 38 as an ignition means constituting an operating mechanism is provided in the ignition cylinder 36, and the ignition heater 38 is electrically connected to the control device 80. The ignition heater 38 can generate heat under the control of the control device 80, and the ignition heater 38 generates heat to heat the wood pellet 18 in the combustion furnace 30, so that the ignition heater 38 becomes the wood pellet 18. It is ignitable.

A supply cylinder 40 is connected to the rear wall of the combustion box 28 (rear wall of the combustion chamber 24) on the lower side of the ignition cylinder 36, and the inside of the supply cylinder 40 is the air supply chamber 34 inside the combustion box 28. And extends rearward from the combustion chamber 24.

An air supply box 42 is connected to the rear side of the ignition cylinder 36 and the rear side of the supply cylinder 40, and the inside of the air supply box 42 communicates with the inside of the ignition cylinder 36 and the inside of the supply cylinder 40. An air supply pipe 42A is connected to the rear wall of the air supply box 42, and the inside of the air supply pipe 42A is communicated with the inside of the air supply box 42 and extends to the rear side from the air supply box 42. .. The air supply pipe 42A is communicated with the air supply pipe 42B via the air supply relay box 43, and the air supply pipe 42B penetrates the lower part of the rear wall of the housing 12 and extends to the outside (outdoor) of the building. There is.

A rectangular parallelepiped left heating chamber 44 and a right heating chamber 46 are provided on the left side and the right side of the combustion chamber 24, respectively, and the front walls of the left heating chamber 44 and the right heating chamber 46 are the seal walls 12A of the housing 12. Has been made. The right wall of the left heating chamber 44 is the left wall of the combustion chamber 24, the left wall of the right heating chamber 46 is the right wall of the combustion chamber 24, and the left heating chamber 44 and the right heating chamber 46 are , Is communicated with the combustion chamber 24 via the heating hole 26 of the combustion chamber 24.

A rectangular parallelepiped box-shaped ash receiving tray 48 is fitted in the lower end of the combustion chamber 24 directly under the combustion box 28, and the inside of the ash receiving tray 48 is opened upward and communicates with the combustion chamber 24. Has been done. The ash tray 48 is slidable in the front-rear direction, and the ash tray 48 is slid forward with the opening / closing door 22 open, so that the ash tray 48 is moved to the outside of the combustion chamber 24 (housing). It can be taken out (outside the body 12).

An exhaust box 52 is connected to the lower end of the rear wall of the combustion chamber 24, the left heating chamber 44, and the right heating chamber 46 under the supply cylinder 40, and the inside of the exhaust box 52 includes the left heating chamber 44 and the left heating chamber 44. It communicates with the right heating chamber 46. An exhaust fan 54 as a blower portion constituting an actuating mechanism is provided in the exhaust box 52, and an exhaust motor 56 as a blower drive means constituting the actuating mechanism is connected to the exhaust fan 54. The exhaust motor 56 is electrically connected to the control device 80, and when the exhaust motor 56 is driven by the control of the control device 80, the exhaust fan 54 is rotated to rotate the left heating chamber 44 and the right heating chamber 46. Air is sucked into the exhaust box 52. Therefore, the air outside the building enters the combustion furnace 30 via the air supply pipe 42B around the exhaust pipe 58, the air supply relay box 43, the air supply pipe 42A, the air supply box 42, and the ignition cylinder 36, which will be described later. Be sucked. Further, the air sucked into the air supply box 42 is sucked into the combustion furnace 30 through the air supply cylinder 40, the air supply chamber 34 in the combustion box 28, and the air hole 32 of the rostrum 30A of the combustion furnace 30. .. Further, the air sucked into the combustion furnace 30 is sucked into the combustion chamber 24 and is sucked into the left heating chamber 44 and the right heating chamber 46 through the respective heating holes 26 of the combustion chamber 24.

An exhaust pipe 58 is connected to the rear wall of the exhaust box 52, and the inside of the exhaust pipe 58 is communicated with the inside of the exhaust box 52 and extends rearward to the air supply relay box 43 and the air supply pipe 42B. It is fitted inside. The exhaust pipe 58 extends to the outside (outdoor) of the building, and the air sucked into the exhaust box 52 by the exhaust fan 54 is discharged to the outside of the building through the inside of the exhaust pipe 58.

A rectangular left heat exchange chamber 60 and a right heat exchange chamber 62 as heat exchange chambers are provided on the left side of the left heating chamber 44 and the right side of the right heating chamber 46, respectively, and the right wall of the left heat exchange chamber 60. The portions other than the upper end of the left wall of the right heat exchange chamber 62 are formed on the left wall of the left heating chamber 44 and the right wall of the right heating chamber 46, respectively. The left wall of the left heat exchange chamber 60 and the right wall of the right heat exchange chamber 62 are the left wall and the right wall of the housing 12, respectively, and the front wall and the upper surface of the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively. The walls are the seal wall 12A and the upper wall of the housing 12, respectively.

A substantially rectangular rear heat exchange chamber 64 as a heat exchange chamber is provided behind the combustion chamber 24, the left heating chamber 44, the right heating chamber 46, the left heat exchange chamber 60, and the right heat exchange chamber 62. The portions other than the upper end portion, the left end portion and the right end portion of the front wall of the rear heat exchange chamber 64 are formed on the rear walls of the combustion chamber 24, the left heating chamber 44 and the right heating chamber 46. The left end and the right end of the front wall of the rear heat exchange chamber 64 are the rear walls of the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively, and the upper part of the left end and the right end of the rear heat exchange chamber 64 is , An open passage hole 69 is formed on the front side, and is communicated to the upper part of the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively. The left wall, right wall, and upper wall of the rear heat exchange chamber 64 are the left wall, right wall, and upper wall of the housing 12, respectively, and the upper portion of the rear wall of the rear heat exchange chamber 64 is a heat insulating structural material. It is composed of and is joined to the front wall of the hopper 16. The transfer cylinder 20A of the supply screw 20 is penetrated through the rear wall of the rear heat exchange chamber 64, and the lower portion of the rear heat exchange chamber 64 is opened to the rear side so as to cover the lower side of the hopper 16 and the supply screw 20. It communicates with the vent 14 on the rear wall of the housing 12 via the housing 12.

A substantially rectangular upper heat exchange chamber 66 as a heat exchange chamber is provided above the combustion chamber 24, the left heating chamber 44, and the right heating chamber 46, and the lower wall of the upper heat exchange chamber 66 is a combustion chamber. 24, the upper wall of the left heating chamber 44 and the right heating chamber 46 is formed, and the upper wall of the upper heat exchange chamber 66 is formed on the upper wall of the housing 12. The front wall of the upper heat exchange chamber 66 is the seal wall 12A of the housing 12, and the left wall, the right wall and the rear wall of the upper heat exchange chamber 66 are the right wall and the right heat of the left heat exchange chamber 60, respectively. It is formed on the left wall of the exchange chamber 62 and the front wall of the rear heat exchange chamber 64. A plurality of rectangular passage holes 68 are formed through the left wall, right wall, and rear wall of the upper heat exchange chamber 66, respectively, and a plurality of passages in the left wall, right wall, and rear wall of the upper heat exchange chamber 66 are formed. The holes 68 communicate the upper heat exchange chamber 66 with the upper ends of the left heat exchange chamber 60, the right heat exchange chamber 62, and the rear heat exchange chamber 64, respectively. A plurality of rectangular slits 70 as opening openings are formed through the upper wall of the upper heat exchange chamber 66, and the plurality of slits 70 open the upper heat exchange chamber 66 into the upper chamber of the housing 12. ing.

A rectangular parallelepiped hot air chamber 72 is provided below the combustion chamber 24, the left heating chamber 44, and the right heating chamber 46, and the left end and the right end of the hot air chamber 72 are left heat exchange chambers 60, respectively. And is communicated with the lower end of the right heat exchange chamber 62. The lower wall of the hot air chamber 72 is the lower wall of the housing 12, and the front wall of the hot air chamber 72 is the front wall of the housing 12. A shutter-shaped outlet 74 is formed through the front wall of the hot air chamber 72, and the outlet 74 opens the hot air chamber 72 into the room on the front side of the lower end of the housing 12.

A hot air fan 76 as a blowing portion constituting the operating mechanism is provided in the hot air chamber 72, and a hot air motor 78 as a blowing driving means constituting the operating mechanism is connected to the hot air fan 76. Has been done. The hot air motor 78 is electrically connected to the control device 80, and the hot air motor 78 is driven by the control of the control device 80 to rotate the hot air fan 76 and air in the hot air chamber 72. Is blown forward from the outlet 74. Therefore, the air in the room on the rear side of the housing 12 is sucked into the rear heat exchange chamber 64 through the vent 14 on the rear wall of the housing 12, and the plurality of passage holes 68 on the rear wall of the upper heat exchange chamber 66 Is sucked into the upper heat exchange chamber 66, and is also sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62 through the upper passage holes 69 of the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively. .. Further, the air in the room above the housing 12 is sucked into the upper heat exchange chamber 66 through the plurality of slits 70 on the upper wall of the upper heat exchange chamber 66. Further, the air sucked into the upper heat exchange chamber 66 is sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively, through the plurality of passage holes 68 in the left wall and the right wall of the upper heat exchange chamber 66. .. Moreover, the air sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62 is sucked into the warm air chamber 72.

A cord 82 is electrically connected to the control device 80, a plug of the cord 82 is detachably attached to the outlet 84, and the control device 80 is electrically connected to the outlet 84 via the cord 82. There is. An operation panel 86 as an operation means is electrically connected to the control device 80, and the operation panel 86 enables an operation operation, a stop operation, and the like. Further, a display device 88 constituting the notification means is electrically connected to the control device 80, and a sounding device 90 (for example, a buzzer) constituting the notification means is electrically connected to the control device 80.

Next, the operation of this embodiment will be described.

In the pellet stove 10 having the above configuration, electric power is supplied from the outlet 84 to the control device 80 and the operation panel 86 via the cord 82. Therefore, under the control of the control device 80, electric power is supplied to the supply motor 20 to drive the supply motor 20C, electric power is supplied to the ignition heater 38 to enable the ignition heater 38 to generate heat, and the exhaust motor 56 is heated. Electric power is supplied to enable the exhaust motor 56 to be driven, and electric power is supplied to the hot air motor 78 to enable the hot air motor 78 to be driven.

When the operation panel 86 is operated in the standby state of the pellet stove 10, the display device 88 displays the operation display (for example, the operation lamp is turned on) under the control of the control device 80.

Further, when the pellet stove 10 is ignited, the supply motor 20C is driven by the control of the control device 80 in the supply screw 20, and the screw 20B is rotated. Therefore, the wood pellets 18 in the hopper 16 flow down into the transport cylinder 20A and are conveyed in the transport cylinder 20A, so that they flow down in the supply cylinder 20D and into the combustion furnace 30 in the combustion chamber 24. It is flowed down.

Then, the exhaust motor 56 is driven by the control of the control device 80, and the exhaust fan 54 is rotated, so that the air in the left heating chamber 44 and the right heating chamber 46 is sucked into the exhaust box 52, and the exhaust pipe is used. It is discharged to the outside of the building through the inside of 58. Therefore, the air outside the building is sucked into the combustion furnace 30 through the air supply pipe 42B around the exhaust pipe 58, the air supply relay box 43, the air supply pipe 42A, the air supply box 42, and the ignition cylinder 36. Will be done. Further, the air sucked into the air supply box 42 is sucked into the combustion furnace 30 through the air supply cylinder 40, the air supply chamber 34 in the combustion box 28, and the air hole 32 of the rostrum 30A of the combustion furnace 30. .. Further, the air sucked into the combustion furnace 30 is sucked into the combustion chamber 24 and is sucked into the left heating chamber 44 and the right heating chamber 46 through the respective heating holes 26 of the combustion chamber 24.

Further, the ignition heater 38 generates heat under the control of the control device 80 to heat the air in the ignition cylinder 36. Therefore, the air is sucked from the ignition cylinder 36 into the combustion furnace 30 to heat the wood pellet 18 in the combustion furnace 30, so that the wood pellet 18 is ignited.

Next, when the pellet stove 10 is burned, the heat generated by the ignition heater 38 is stopped. Further, the exhaust motor 56 is continuously driven by the control of the control device 80. Therefore, the air in the ignition cylinder 36 and the air supply chamber 34 is sucked (spouted) into the combustion furnace 30, and the wood pellets 18 in the combustion furnace 30 are burned, and the flame F is placed on the upper side of the combustion furnace 30. Stands up. As a result, the air in the combustion chamber 24 is heated, and the air is sucked into the left heating chamber 44 and the right heating chamber 46 through the heating holes 26 of the combustion chamber 24. The combustion of the wood pellet 18 generates ash and scatters it in the combustion chamber 24, but the ash naturally falls and is stored in the ash receiving tray 48. Further, the supply motor 20C is driven by the control of the control device 80, and the wood pellets 18 in the hopper 16 flow down into the combustion furnace 30.

Further, by driving the hot air motor 78 under the control of the control device 80, the hot air fan 76 is rotated, and the air in the hot air chamber 72 is blown out from the outlet 74 to the front side. Therefore, the air in the room on the rear side of the housing 12 is sucked into the rear heat exchange chamber 64 through the vent 14 on the rear wall of the housing 12, and the plurality of passage holes 68 on the rear wall of the upper heat exchange chamber 66 Is sucked into the upper heat exchange chamber 66, and is also sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62 through the upper passage holes 69 of the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively. .. Further, the air in the room on the upper side of the housing 12 is sucked into the upper heat exchange chamber 66 through the plurality of slits 70 on the upper wall of the upper heat exchange chamber 66. Further, the air sucked into the upper heat exchange chamber 66 is sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62, respectively, through the plurality of passage holes 68 in the left wall and the right wall of the upper heat exchange chamber 66. .. Moreover, the air sucked into the left heat exchange chamber 60 and the right heat exchange chamber 62 is sucked into the warm air chamber 72.

As a result, the air in the post-heat exchange chamber 64 passes through the front wall of the post-heat exchange chamber 64 (the rear wall of the combustion chamber 24, the left heating chamber 44, and the right heating chamber 46) with the heated air in the combustion chamber 24. It is heated by exchanging heat between them. Further, the air in the upper heat exchange chamber 66 passes through the lower wall (combustion chamber 24, the left heating chamber 44 and the upper wall of the right heating chamber 46) of the upper heat exchange chamber 66 to the combustion chamber 24, the left heating chamber 44 and the right heating. It is heated by exchanging heat with the heated air in the chamber 46. Further, the air in the left heat exchange chamber 60 is heated by exchanging heat with the heated air in the left heating chamber 44 via the right wall of the left heat exchange chamber 60 (the left wall of the left heating chamber 44). .. Further, the air in the right heat exchange chamber 62 is heated by heat exchange with the heated air in the right heating chamber 46 via the left wall of the right heat exchange chamber 62 (the right wall of the right heating chamber 46). ..

Therefore, the air heated in the post-heat exchange chamber 64, the upper heat exchange chamber 66, the left heat exchange chamber 60, and the right heat exchange chamber 62 is sucked into the hot air chamber 72 by the hot air fan 76, and the outlet 74. Is blown into the room on the front side of the lower end of the housing 12. Therefore, the air in the room is warmed while being forcibly convected by the pellet stove 10, and the temperature unevenness is reduced and warmed in a short time.

After that, when the operation panel 86 is stopped, the pellet stove 10 is extinguished, the drive of the supply motor 20C is terminated by the control of the control device 80, and the wood pellet 18 in the hopper 16 is burned. The flow into the furnace 30 is completed. Further, the exhaust motor 56 and the warm air motor 78 are continuously driven by the control of the control device 80. Therefore, the air in the ignition cylinder 36 and the air supply chamber 34 is sucked (spouted) into the combustion furnace 30, and the wood pellet 18 in the combustion furnace 30 is satisfactorily burned. Further, air is passed through the housing 12 to cool the housing 12.

Then, after all the wood pellets 18 in the combustion furnace 30 are burned and the fire is extinguished, the drive of the exhaust motor 56 and the hot air motor 78 is terminated by the control of the control device 80, and the display device 88 operates. Ends the display of (for example, turns off the operation lamp). Therefore, the pellet stove 10 is put into a standby state.

By the way, for example, when the connection of the cord 82 to the outlet 84 is disconnected due to a power failure or the pellet stove 10 loses power, the power supply to the pellet stove 10 (control device 80) is stopped.

If the power supply to the pellet stove 10 is stopped when the pellet stove 10 is put into the standby state, the flag "0" is set in the control device 80 and stored in the memory of the control device 80. If the power supply to the pellet stove 10 is stopped when the pellet stove 10 is ignited, the flag "1" is set in the control device 80 and stored in the memory of the control device 80. If the power supply to the pellet stove 10 is stopped when the pellet stove 10 is burned, the flag "2" is set in the control device 80 and stored in the memory of the control device 80. When the power supply to the pellet stove 10 is stopped when the pellet stove 10 is extinguished, the flag "3" is set in the control device 80 and stored in the memory of the control device 80.

After that, for example, when the power failure ends or the cord 82 is connected to the outlet 84 and the power of the pellet stove 10 is restored, the power supply to the pellet stove 10 (control device 80) is restarted.

When the power supply to the pellet stove 10 in the standby state is stopped (after the flag "0" is set in the control device 80) and the power supply to the pellet stove 10 is restarted, the pellet stove 10 is used. The standby state is maintained.

After the power supply to the pellet stove 10 in the ignition operation state, the combustion operation state, or the fire extinguishing operation state is stopped (after the flag "1", the flag "2", or the flag "3" is set in the control device 80). When the power supply to the pellet stove 10 is resumed, the pellet stove 10 is forcibly extinguished when the operation panel 86 is not operated for a specified time (for example, 5 seconds).

Therefore, when the exhaust motor 56 is driven by the control of the control device 80, the air in the ignition cylinder 36 and the air supply chamber 34 is sucked (spouted) into the combustion furnace 30, and the wood pellets in the combustion furnace 30 are sucked. 18 is burned well. Further, air is passed through the housing 12 to cool the housing 12. Further, under the control of the control device 80, the display device 88 displays the operation display and the display device 88 displays the abnormality display (for example, the character "Error"). Further, under the control of the control device 80, the sounding device 90 generates a warning sound at short intervals, and the operation panel 86 is terminated, so that the sounding device 90 ends the generation of the warning sound.

Then, after all the wood pellets 18 in the combustion furnace 30 are burned and the fire is extinguished, the drive of the exhaust motor 56 is terminated by the control of the control device 80, and the display device 88 ends the display of the operation display. , The sounding device 90 generates a warning sound for a predetermined time (for example, 5 seconds). Further, the operation panel 86 is terminated, and the display device 88 terminates the display of the abnormality display under the control of the control device 80. As a result, the pellet stove 10 is put into a standby state.

Here, as described above, after the power supply to the pellet stove 10 in the operating state (ignition operating state, combustion operating state or fire extinguishing operating state) is stopped (flag "1", flag "2" or in the control device 80. After the flag "3" was set), the pellet stove 10 was forcibly extinguished by the control of the control device 80 based on the restart of the power supply to the pellet stove 10, and the exhaust motor 56 was driven. Will be done. Therefore, even if the power supply to the pellet stove 10 in the operating state is stopped and the wood pellet 18 is present in the combustion furnace 30, when the power supply to the pellet stove 10 is restarted, the combustion furnace 30 By sucking (blowing) air into the inside, all the wood pellets 18 in the combustion furnace 30 can be satisfactorily burned, and the wood pellets 18 in the combustion furnace 30 can be appropriately extinguished. Moreover, even when the wood pellet 18 in the combustion furnace 30 is burned, the housing 12 can be cooled by passing air through the housing 12. Further, after the power supply to the pellet stove 10 in all the states (ignition operation state, combustion operation state and fire extinguishing operation state) in which the wood pellet 18 is present in the combustion furnace 30 is stopped, the power supply to the pellet stove 10 is supplied. When the pellet stove 10 is restarted, the pellet stove 10 is forcibly extinguished, so that the wood pellet 18 can be effectively suppressed from remaining in the combustion furnace 30.

Further, as described above, the flag "0", the flag "1", the flag "2" or the flag "3" set in the control device 80 when the power supply to the pellet stove 10 is stopped is the control device 80. By being stored in the memory, the state of the pellet stove 10 (standby state, ignition operation state, combustion operation state or fire extinguishing operation state) when the power supply to the pellet stove 10 is stopped is stored in the memory of the control device 80. Will be done. Therefore, the state of the pellet stove 10 when the power supply to the pellet stove 10 is stopped can be confirmed, and for example, the cause of the power supply to the pellet stove 10 being stopped can be investigated.

In this embodiment, the case where the present invention is applied to the pellet stove 10 has been described. However, the present invention can also be applied to boilers and the like that use wood pellets as fuel.

10 Pellet stove (wood pellet burning device)
18 Wood pellets 20 Supply screw (actuation mechanism)
24 Combustion chamber 38 Ignition heater (actuation mechanism)
54 Exhaust fan (actuating mechanism)
56 Exhaust motor (actuating mechanism)
76 Warm air fan (actuating mechanism)
78 Hot air motor (actuating mechanism)
80 Control device (actuation mechanism)

Claims (5)

A combustion chamber where wood pellets are burned and air is heated,
It is operated while the electric power is supplied to burn the wood pellets in the combustion chamber, and at the same time, air is sent to the combustion chamber based on the fact that the electric power is supplied after the electric power supply is stopped in the operated state. The actuating mechanism that blows air and
A wood pellet burning device equipped with. Based on the fact that power was supplied to the operating mechanism after the supply of electric power to the operating mechanism was stopped while the operating mechanism supplied wood pellets to the combustion chamber and ignited the wood pellets in the combustion chamber. The wood pellet combustion apparatus according to claim 1, wherein the operating mechanism blows air into the combustion chamber. The actuation mechanism supplies the wood pellets to the combustion chamber, and the power is supplied to the actuation mechanism after the supply of power to the actuation mechanism is stopped while the wood pellets in the combustion chamber are burned. The wood pellet combustion apparatus according to claim 1 or 2, wherein the operating mechanism blows air into the combustion chamber based on the above. Power was supplied to the operating mechanism after the operating mechanism ended the supply of wood pellets to the combustion chamber and the supply of electric power to the operating mechanism was stopped while air was being blown into the combustion chamber. The wood pellet combustion apparatus according to any one of claims 1 to 3, wherein the operating mechanism blows air into the combustion chamber based on the above. The wood pellet combustion apparatus according to any one of claims 1 to 4, wherein the state of the operating mechanism is stored when the supply of electric power to the operating mechanism is stopped.

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