KR20180037526A - Pellet Stove Capable of Auto Removing Ash - Google Patents

Abstract

Disclosed is a pellet stove capable of automatically removing ashes. The pellet stove capable of automatically removing ashes according to one embodiment of the present invention comprises: a furnace portion formed with an air flow hole where air can flow, providing a space in which a pellet fuel is combusted as the pellet fuel is supplied thereto, and including a furnace housing formed with an aperture having ashes falling on the bottom thereof and an ignition portion for lighting the pellet fuel; and an ash processing portion disposed in the aperture of the furnace housing, and including a rotation module rotating the ashes generated in the combustion in accordance with rotation to a lower portion thereof and an ash rack located at the bottom of the rotation module and receiving the ashes fell by rotation of the rotation module.

Description

[0001] Pellet Stove Capable of Auto Removing Ash [

The present invention relates to a pellet stove, and more particularly to a pellet stove capable of automatic reprocessing, characterized in that it is configured to automatically drop the ash.

When using electricity, gas, briquettes or oil as the fuel, the fuel itself is expensive, and the combustion gas discharged from the combustion process contains a large amount of chemical harmful substances. , Environmental pollution is a concern. Therefore, in recent years, the use of cheap and environmentally friendly pellets fuel has been increasing, and pellets fuel is also used in the hearth for heating the room.

The pellet stove using the pellet fuel as described above is disclosed in Japanese Patent Application Laid-Open No. 10-1271748 (Registration date 2013.05.30) and No. 10-1564844 (Registration date 2015.10.26), and most of these pellet stoves The external air required for the combustion of the pellet fuel flows through the vent hole formed in the bottom surface of the furnace where the pellets are burned and the pellet fuel is burned. Is heated and exchanged with the air supplied to the blowing fan, and the heated air is sent to the discharge port to heat the room.

That is, the pellet stove disclosed in the above-mentioned prior art supplies the pellet fuel using a transfer device such as a fuel supply device in the storage hopper, with the furnace at the bottom of the main body, When the heat generated by the flame is generated, the air sucked from the indoor side passing through the heat exchange line is heat-exchanged to be heated to a predetermined temperature, and the air (or heating heat) So that it can be discharged to the room side through the heating pipe.

Fig. 1 is a perspective view of a conventional pellet stove, Fig. 2 is an exploded view of a conventional pellet stove, and Fig. 3 is a sectional view of a conventional pellet stove.

1 to 3, the conventional pellet stove forms a closed space (a) for air circulation at the lower end side of the furnace 10, while a box-like structure is provided at the lower end side of the closed space (a) The ash receptacle 20 is fixedly installed so that the ashtray 20 is caught during the combustion of the pellet fuel in the furnace 10 to collect the residue (for example, fly ash) scattered.

At this time, in the closed space (a) for air circulation formed at the lower end of the furnace (10), various residues (for example, ash, clinker, slag Slag) and the like are discharged and can be dropped into the ashtray 20.

However, when a large amount of residue is accumulated in the closed space (a) when the pellet stove is operated for a long time, there is a problem that the residue accumulated in the closed space (a) can not fall on the ash receiver 20, Therefore, conventionally, the air circulation through the vent hole 11 of the furnace 10 is not properly performed, and the combustion efficiency with respect to the pellet fuel in the furnace 10 is lowered.

Particularly, since the ashtray 20 applied to the conventional pellet stove has a fixed structure in which the separation is not free, there is a considerable difficulty in processing the residue accumulated in the closed space (a).

3, when the furnace 10 and the ashtray 20 are separated by the partition 30, the furnace 10 is installed in the installation hole 301 provided in the partition 30, So that various residues generated by the burning of the pellet fuel in the furnace 10 can be prevented from entering the ashtray 20 through the bottom of the ashtray 20, A part of the residue is accumulated in the closed space a and the blast furnace 10 is first removed from the partition 30 and the installation hole 31 of the partition 30 is removed, The suction pipe of the vacuum cleaner enters the bottom of the air suction space (a) or the residue accumulated in the ash receiver 20 is removed.

However, the installation hole 31 of the partition 30 is narrow and the inconvenience of removing the ash using a separate cleaning tool such as a vacuum cleaner can not be avoided, The air is not smoothly circulated from the closed space a to the air hole 11 of the blast furnace 10 and is interfered with, The combustion efficiency with respect to the pellet fuel in the furnace 10 was inevitably lowered.

Patent Registration No. 10-1271748 Patent Registration No. 10-1564844

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and an object of the present invention is as follows.

First, the present invention intends to provide an automatic reprocessing pellet stove capable of automatically dropping a material accumulated in a central portion of a furnace where heat heated by an ignition portion in a furnace housing reaches.

Second, the present invention provides a pellet stove that is free from thermal expansion due to long-term use and can be automatically reprocessed to prevent product deformation due to thermal stress.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a pellet stove capable of automatic reprocessing, including a furnace part and a reprocessing part.

Wherein the furnace is provided with an air flow hole through which air can move, a furnace housing provided with a space in which the pellet fuel is combusted as the pellet fuel is supplied, an opening through which the ash falls down, As shown in Fig.

The reprocessing unit includes a rotary module disposed at an opening of the furnace housing and moving the ash-driven material downward according to the rotation, and an ash receiving unit located below the rotary module and accommodated by the rotation of the rotary module do.

The rotating module may include a driving unit, a driven unit, and a driving motor.

The driving unit may include a driving shaft, and a plurality of first rotating members disposed on the driving shaft, the first rotating member being perpendicular to the rotating shaft of the driving shaft and spaced apart from each other.

Wherein the driven portion includes a driven shaft that rotates in a direction opposite to the drive shaft in accordance with rotation of the drive shaft, and a driven shaft that is positioned on the driven shaft and is located between the first rotated members spaced from each other, And a plurality of second rotating members arranged to be shifted from each other.

The drive motor may be mechanically connected to the drive shaft to rotate the drive shaft.

A first gear may be coupled to one side of the drive shaft, and a second gear may be coupled to the driven shaft to rotate together with the first gear to rotate together with the first gear.

The first rotating member and the second rotating member may be formed with a seating groove on which the ash is mounted and which functions to raise or lower the ash upon rotation.

The openings may be alternately formed with protrusions and depressions so as to correspond to the shapes of the first rotating member and the second rotating member.

The ashtray may be formed in a drawer shape.

The receptacle may be provided with a handle comprising a first vertical part extending from one end of the receptacle, a first horizontal part bent from the first vertical part, and a second vertical part bent from the first horizontal part have.

An ignition hole may be formed in the furnace housing to transmit heat from the ignition portion.

The pellet stove capable of automatic reprocessing of the present embodiment may further include a pellet supply unit for automatically supplying pellet fuel to the furnace housing.

Wherein the pellet supplying unit includes a hopper for storing the pellet fuel, a light oil portion disposed below the hopper to communicate with the hopper, a supply pipe connected from the light oil portion to the furnace housing, a rotating shaft disposed inside the light oil portion, The pellet fuel may be supplied to the furnace housing through the supply pipe by rotation of the screw conveyor including a conveying portion including a screw conveyor formed on the rotating shaft and a feed motor for rotating the rotating shaft.

The pellet stove capable of automatic reprocessing according to the present embodiment further comprises a main body forming an outer appearance of the pellet stove, wherein the main body is provided with a supply port communicating with the hopper to supply the pellet fuel to the hopper, The supply port may be provided with a door capable of selectively opening and closing the supply port.

The effects of the present invention will be described below.

First, according to the pellet stove capable of automatic reprocessing according to an embodiment of the present invention, the ash accumulated in the furnace housing automatically falls down to the ash placed at the bottom by the operation of the rotating module, Since residues including ashes are not left inside, ignition is facilitated, incomplete combustion is prevented, and generation of noxious gas can be minimized.

Secondly, according to the pellet stove capable of automatic reprocessing according to an embodiment of the present invention, since an opening is formed in the lower part of the furnace housing and the lower part is opened unlike the integrated furnace, the furnace is free from thermal expansion due to long- Thus, deformation of the product due to thermal stress can be prevented.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

The foregoing summary, as well as the detailed description of the preferred embodiments of the present application set forth below, may be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown preferred embodiments in the figures. It should be understood, however, that this application is not limited to the precise arrangements and instrumentalities shown.
1 is a perspective view of a conventional pellet stove;
2 is an exploded view of a conventional pellet stove;
3 is a sectional view of a conventional pellet stove;
FIG. 4 is a perspective view of a pellet stove capable of automatic reprocessing according to an embodiment of the present invention; FIG.
Figure 5 illustrates the interior of a pellet stove capable of automatic reprocessing according to one embodiment of the present invention;
FIG. 6 is a view showing a furnace part and a reprocessing part in a pellet stove capable of automatic reprocessing according to an embodiment of the present invention; FIG.
Figure 7 illustrates a furnace housing of a pellet stove capable of automatic reprocessing according to an embodiment of the present invention;
FIG. 8 is a view showing a rotation module of a reprocessing unit of a pellet stove capable of automatic reprocessing according to an embodiment of the present invention; FIG.
9 is a view showing a state before the operation of the reprocessing portion of the pellet stove capable of automatic reprocessing according to an embodiment of the present invention; And
10 is a view showing a state after the operation of the reprocessing section of the pellet stove capable of automatic reprocessing according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the appended drawings illustrate the present invention in order to more easily explain the present invention, and the scope of the present invention is not limited thereto. You will know.

In describing the embodiments of the present invention, it is to be noted that elements having the same function are denoted by the same names and numerals, but are substantially not identical to elements of the prior art.

Also, the terms used in the present application are used only to describe certain embodiments and are not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, a pellet stove capable of automatic reprocessing according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is a perspective view of a pellet stove capable of automatic reprocessing according to an embodiment of the present invention, and FIG. 5 is a view illustrating the interior of a pellet stove capable of automatic reprocessing according to an embodiment of the present invention.

As shown in FIGS. 4 and 5, a pellet stove capable of automatic reprocessing according to an embodiment of the present invention may include a main body 100 forming an outer appearance. An intake pipe (not shown) for sucking outside air to supply the air required for burning the pellet fuel while discharging the combustion gas generated according to the combustion of the pellet to the outside when the pellet which is the solid fuel is burned An exhaust pipe (not shown) for exhausting the combustion gas to the outside can be formed in the main body 100.

The pellet stove of this embodiment includes a pellet supply unit 400, a blowing fan 500, a furnace unit 200, and a reprocessing unit 300.

First, the pellet supply unit 400 can automatically supply the pellet fuel to the housing 210 by the following method. The pellet feeder 400 may include a hopper 410, a light oil portion 420, a feed pipe 430, and a feed portion 440.

The hopper 410 may store pellet fuel.

The light oil portion 420 is disposed below the hopper 410 to communicate with the hopper 410 so that the pellet fuel stored in the hopper 410 can move to the light oil portion 420 by its own weight.

The supply pipe 430 is connected from the light oil portion 420 to the furnace housing 210 to guide the pellet fuel of the light oil portion 420 to the furnace housing 210.

The conveying unit 440 includes a rotating shaft 442 disposed inside the light oil portion 420, a screw conveyor 444 formed on the rotating shaft 442, and a conveying motor 446 rotating the rotating shaft 442 The screw conveyor 444 is rotated by the rotation of the feed motor 446 to move the pellet fuel to the feed pipe 430 side. Thereby, the pellet fuel can be supplied to the furnace housing 210 through the supply pipe 430.

The main body 100 is provided with a supply port (not shown) communicating with the hopper 410 and capable of supplying pellet fuel to the hopper 410. A supply port (not shown) A door 104 that can be opened and closed can be provided.

Further, the blowing fan 500 can heat-exchange the heat generated when the pellet fuel is burned in the furnace housing 210 with air.

That is, the blowing fan 500 sucks the low-temperature room air in the lower part of the pellet stove body 100 as indoor air supply means, supplies the sucked air to the heat exchanging unit 600, and conveys the heat-exchanged air to the outlet 102 The blowing fan 500 and the heat exchanging unit 600 can communicate with each other through a heat exchange line. The indoor air supplied from the blower fan 500 by the heat exchange line can be guided to the heat exchanger 600.

Here, the outlet 102 is blown from the blowing operation of the blowing fan 500, and is heat-exchanged by the heat exchanging part 600, so that the heated air can be discharged to the room.

FIG. 6 is a view showing a furnace part and a reprocessing part in a pellet stove capable of automatic reprocessing according to an embodiment of the present invention, and FIG. 7 is a cross- 8 is a view showing a rotation module of the reprocessing unit of the pellet stove capable of automatic reprocessing according to an embodiment of the present invention.

The furnace section (200) includes a furnace housing (210) and an ignition section (220).

As shown in FIG. 7, the furnace housing 210 is a space where combustion of the pellet fuel is performed, and a plurality of air flow holes 212 through which air can move can be formed on the side surface. An ignition hole 214 through which heat is transferred from the ignition part 220 may be formed at one side of the furnace housing 210. The furnace housing 210 is installed in the mounting hole of the partition wall in the main body 100, and receives pellets, which are solid fuel, from the pellet supply unit 400 and burns the pellets.

The upper portion of the furnace housing 210 is opened, and an opening 216 partially opened at the lower portion is formed. The rotary module 310 of the reprocessing unit 300 to be described later is positioned in the opening 216 and the ash can be dropped to the lower part according to the operation of the rotation module 310. The shape of the opening 216 will be described later together with the configuration of the rotation module 310. [

The ignition unit 220 performs an ignition operation so that combustion of the pellet fuel is performed in the furnace housing 210 when outside air is supplied into the furnace housing 210 through an intake pipe (not shown).

As shown in FIG. 6, the reprocessing unit 300 includes a rotation module 310 and an ashtray 350.

The rotation module 310 is disposed in the opening 216 of the furnace housing 210. And, it plays a role of moving the ash generated by the combustion according to the rotation to the lower part.

As shown in FIG. 8, the rotation module 310 may further include a driving unit 320, a follower unit 330, and a driving motor 340.

The driving unit 320 may include a driving shaft 322 and a first rotating member 324 disposed on the driving shaft 322 and perpendicular to the rotational axis of the driving shaft 322. A plurality of first rotating members 324 may be provided and a plurality of first rotating members 324 may be disposed on the driving shaft 322 so as to be spaced apart from each other.

The first rotary member 324 is a disk-shaped disk and has a seating groove 324a which is seated on one side of the first rotary member 324 and functions to raise or lower the material as it rotates . In this embodiment, the seating groove 324a is formed on the outer circumferential surface of the first rotary member 324 and may be formed so as to extend perpendicularly to the inside of the first rotary member 324.

The first gear 326 may be coupled to the driven shaft 332.

The follower portion 330 includes a driven shaft 332 rotating in the opposite direction to the drive shaft 322 in accordance with the rotation of the drive shaft 322 and a second rotating member 334 coupled to the driven shaft 332 . The second rotating member 334 is disposed perpendicularly to the rotating shaft of the driven shaft 332 and a plurality of second rotating members 334 are disposed between the first rotating members 324 spaced from each other, 324, respectively.

The shape of the second rotating member 334 may be the same as that of the first rotating member 324. That is, the second rotary member 334 also has a disk shape, and a seating groove 334a can be formed. However, the first rotating member 324 and the second rotating member 334 may be coupled to the driving shaft 322 and the driven shaft 332 in directions opposite to each other.

A second gear 336 may be coupled to the driven shaft 332. The second gear 336 meshes with the first gear 326. When the first gear 326 coupled to the drive shaft 322 rotates in accordance with the rotation of the drive shaft 322, The second gear 336 engaged with the first gear 326 rotates in the direction opposite to the first gear 326 and the driven shaft 332 coupled thereto can rotate. In other words, the drive shaft 322 rotates to the driven shaft 332.

The driving shaft 322 may be provided with a driving motor 340 that is mechanically connected to the driving shaft 322 to rotate the driving shaft 322.

As described above, the openings 216 may be formed in the lower portion of the furnace housing 210. As described above, since the opening 216 is formed in the lower portion of the furnace housing 210 and the lower portion is opened unlike the integrated furnace, the furnace is free from thermal expansion due to long-term use, can do.

The rotation module 310 is disposed in the opening 216 formed in the furnace housing 210 and more particularly the driving part 320 and the follower part 330 can be disposed in the opening 216. That is, the upper part of the driving part 320 and the driven part 330 may be located in the furnace housing 210, and the lower part of the driving part 320 and the driven part 330 may be located outside the furnace housing 210.

The opening 216 has a shape corresponding to the shape of the opening 216 when the first rotating member 324 and the second rotating member 334 are located in the opening 216 such that the pellet fuel and the ash can not fall down through the gap. Lt; / RTI > That is, the opening 216 may have a rectangular saw shape in which projections and depressions alternate as shown in the figure, and the protruding portions may be positioned between the first rotating member 324 and the second rotating member 334 .

 The ash remaining after combustion is positioned on the driving part 320 and the driven part 330 and the seating grooves 324a and 334a are pushed up by the rotation of the driving part 320 and the driven part 330, (324a, 334a). When the driving unit 320 and the driven unit 330 further rotate, the seating grooves 324a and 334a may fall down to the lower portion of the housing 210 in a downward direction.

The ashtray 350 may be disposed at a lower portion of the rotation module 310 to receive the material dropped through the flow hole 212 or dropped by the rotation of the rotation module 310. The ashtray 350 may be formed in a drawer shape so as to easily empty the ash.

A handle 352 may be formed on the ashtray 350 wherein the handle 352 includes a first vertical portion 352a extending from one end of the ashtring 350 and a second vertical portion 352b extending from the first vertical portion 352a And a second vertical portion 352c bent from the first horizontal portion 352b.

The structure of the pellet stove capable of automatic reprocessing of the present embodiment has been described above.

Hereinafter, the operation of the pellet stove capable of automatic regeneration according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 9 is a view showing a state before the operation of the reprocessing part of the pellet stove capable of automatic reprocessing according to an embodiment of the present invention, and FIG. 10 is a view showing a part of the reprocessing part of the pellet stove, And Fig.

First, when the door 104 formed in the main body 100 is opened and the hopper 410 is filled with pellet fuel through a feed port (not shown) and then the feed motor 446 is operated, the screw conveyor 444 rotates, And feeds the fuel to the supply pipe 430. The pellet fuel transferred to the supply pipe 430 may be supplied to the furnace housing 210 along the supply pipe 430.

When the pellet fuel is supplied to the furnace housing 210, the igniter 220 may be operated to burn the pellet fuel. When the pellet fuel is combusted in the furnace housing 210, the outside air introduced through the intake pipe (not shown) flows into the furnace housing 210 through the flow holes 212 and flows into the furnace housing 210 It is possible to burn the pellet fuel.

The combustion heat generated when the pellet fuel in the furnace housing 210 is burned causes the indoor air to heat-exchange.

That is, when the blowing fan 500 is driven during the combustion of the pellet fuel in the furnace housing 210 and the outside air is forcibly sucked in accordance with the driving of the blowing fan 500, the forcibly sucked outside air flows along the heat- (Not shown). The outdoor air is heated to a predetermined temperature by the heat exchange unit 600, and is then discharged to the outside through the outlet 102 so that indoor heating can be performed.

On the other hand, when the pellet fuel is burned as described above, ash residue, which is a residue of combustion, is generated in the burner housing 210. The ash may remain in the furnace housing 210 or may fall down through the flow holes 212.

The ash remaining in the furnace housing 210 can be dropped to the ash receiver 350 by the operation of the rotation module 310. That is, the ash remaining after combustion is positioned on the driving part 320 and the driven part 330 and the seating grooves 324a and 334a are pushed up by the rotation of the driving part 320 and the driven part 330, (324a, 334a). When the driving unit 320 and the driven unit 330 further rotate, the seating grooves 324a and 334a may fall down to the lower portion of the housing 210 in a downward direction.

The material falling through the rotation hole 310 or falling through the flow hole 212 can be collected in the ash receptacle 350.

When the ash gathered in the ashtray 350 is increased, the user opens the main body 100 to take out the ashtray 350 out of the ashtray 350 by holding the handle 352 to empty the ash collected in the ashtring 350 have. Therefore, the ash collected in the ashtray 350 can be easily removed without using a vacuum cleaner or the like as a vacuum suction means.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

100: main body 102: outlet
104: door 200:
210: furnace housing 212: flow hole
214: ignition hole 216: opening
220: Ignition part 300: Reprocessing part
310: rotation module 320:
322: drive shaft 324: first rotating member
324a: seat groove 326: first gear
330: follower portion 332: driven shaft
334: second rotating member 334a: seat groove
336: second gear 340: drive motor
350: ash tray 352: handle
400: pellet supply part 410: hopper
420: light oil portion 430: supply pipe
440: Feeder 500: Fan
600: heat exchanger

Claims (11)

An air flow hole through which air can be moved, a furnace housing provided with a space in which the pellet fuel is combusted as the pellet fuel is supplied, and an opening portion where the ash falls down, and an ignition housing for igniting the pellet fuel A furnace portion including a portion; And
A reprocessing unit disposed at an opening of the furnace housing and having a rotating module for moving the ash according to the rotation downward and a ash receiving unit for receiving the ash dropped by rotation of the rotating module;
Characterized in that the pellet stove comprises a plurality of pelletized stator units. The method according to claim 1,
The rotation module includes:
A driving unit including a driving shaft and a plurality of first rotating members disposed on the driving shaft so as to be perpendicular to a rotational axis of the driving shaft and spaced apart from each other;
A driven shaft which rotates in a direction opposite to the drive shaft in accordance with rotation of the drive shaft, and a driven shaft which is disposed on the driven shaft and is disposed between the first rotating member and the first rotating member, A follower including a plurality of second rotating members; And
A drive motor mechanically connected to the drive shaft to rotate the drive shaft;
Characterized in that the pellet stove comprises a plurality of pelletized stator units. 3. The method of claim 2,
A first gear is coupled to one side of the drive shaft and a second gear is provided on the driven shaft to rotate with the first gear in conjunction with the rotation of the first gear to rotate the driven shaft. Pellet stove with automatic reprocessing. 3. The method of claim 2,
Wherein the first rotatable member and the second rotatable member are formed with a seating groove on which the ash is seated and which functions to raise or lower the ash upon rotation. 3. The method of claim 2,
The opening
Wherein protrusions and depressions are alternately formed so as to correspond to the shapes of the first rotating member and the second rotating member. The method according to claim 1,
Wherein the ash-
Wherein the pellet is formed in a drawer shape. The method according to claim 1,
In the ash receiving unit,
Characterized in that a grip including a first vertical part extending from one end of the ash receiving part, a first horizontal part bent from the first vertical part, and a second vertical part bent from the first horizontal part is formed Reprocessable pellet stove. The method according to claim 1,
In the furnace housing,
And an ignition hole is formed so that heat can be transferred from the ignition part. The method according to claim 1,
Further comprising a pellet feeder for automatically feeding pellet fuel to said furnace housing. 10. The method of claim 9,
The pellet feeder
A hopper in which the pellet fuel is stored;
A light oil portion disposed under the hopper and arranged to communicate with the hopper;
A supply pipe connected from the gas passage portion to the furnace housing;
A conveying unit including a rotating shaft disposed inside the light oil portion, a screw conveyor formed on the rotating shaft, and a feed motor rotating the rotating shaft;
Wherein the pellet fuel is supplied to the furnace housing through the feed tube by rotation of the screw conveyor. 11. The method of claim 10,
The main body further comprises a main body forming an outer appearance of the pellet stove, wherein a feed port is formed in the main body so as to communicate with the hopper to supply the pellet fuel to the hopper, and the feed port is selectively opened and closed Characterized in that a door is provided which is capable of automatically reprocessing.

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