JP2021191987A - Grain dryer - Google Patents

Abstract

To provide a grain dryer provided with an automatic cleaning operation mode whereby grain of a brand variety is not allowed to intermingle with grain of a different brand variety during a grain drying operation, without delaying a drying operation.SOLUTION: The grain dryer comprising a grain storage unit disposed above a grain drying unit, and a bucket elevator vertically disposed to connect a lower screw conveyor horizontally disposed on the bottom of the grain drying unit and an upper screw conveyor horizontally disposed on the upper part of the grain storage unit, and a controller of the grain dryer provided with an automatic cleaning operation mode of discharging residual grain remaining in the dryer to the outside after finishing an operation of discharging dried grain to the outside of the dryer, is configured such that the controller carries out an automatic cleaning operation according to the automatic cleaning operation mode prior to an operation of charging grain if a brand variety of the grain being currently charged is different from that of the grain having been previously charged.SELECTED DRAWING: Figure 1

Description

The present invention relates to a grain dryer, and more particularly to a grain dryer having an automatic cleaning operation mode.

Conventionally, it is well known in Patent Document 1 and the like that this type of grain dryer is provided with an automatic cleaning operation mode in which grains and dust remaining inside the dryer are discharged to the outside of the machine after the drying operation is completed. Since the residual grain in the machine is reduced by this automatic cleaning operation, there is an advantage that different varieties and brands do not mix with each other when continuously drying raw grains having different varieties and brands even if they are the same paddy rice.

However, even if the grain to be dried next time is of the same variety as the previous one, or if the grain is harvested from the same field as the previous time, it is not always necessary to clean it after each drying, and in that case, it is rather dried. There is a risk of delaying work. Further, in the automatic cleaning operation, relatively light dust can be removed by the exhaust fan, but the grains remaining on the bottom of the screw conveyor, bucket elevator, etc. cannot be completely discharged. It was necessary to manually discharge the residual grains inside the machine body with an air gun or a broom (see [0038] of Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-61521

In view of the above problems, it is an object of the present invention to provide a grain dryer having an automatic cleaning operation mode in which different kinds of brands are not mixed in the grain drying work without unnecessarily delaying the drying work. And.

In order to achieve the above object, the present invention
A grain storage section is provided on the grain drying section, and a bucket elevator is erected to connect the lower screw conveyor located horizontally at the bottom of the grain drying section and the upper screw conveyor located horizontally above the grain drying section. The grain dryer is equipped with an automatic cleaning operation mode in which the control unit of the grain dryer discharges the grains remaining in the machine to the outside of the machine after the work of discharging the dried grains to the outside of the machine is completed. In a grain dryer
The control unit is characterized in that when the variety brand of the grain to be loaded this time and the variety brand of the grain to be loaded last time are different, the automatic cleaning operation by the automatic cleaning operation mode is performed before the grain loading operation. And.

The present invention
An input setting unit for inputting and setting the grain type brand to be put into the dryer and a comparison unit for comparing the variety brand input and set this time with the type brand previously input and set are provided in the input setting unit. As a result of comparison, when these two varieties are different, it is preferable that the control unit performs the automatic cleaning operation before the grain loading operation of the varieties brand input and set this time.

The present invention
Further, it is preferable to provide a registration unit for registering the grain variety brand, and to select and set the input setting of the variety brand to the input setting unit from a plurality of variety brands registered in advance in the registration unit.

Further, the present invention
It is preferable to set the input of the product type brand to the input setting unit through the communication means.

The present invention
The bottom surface of the conveyor case of the lower screw conveyor is a porous wall surface, and a long blower box is provided in contact with the porous wall surface and a fan for blowing air is provided inside the blower box, while the porous wall surface is blown by the fan. Does not have an inclined slit that blows in the transport direction of the lower screw conveyor, and in the automatic cleaning operation, the grain remaining in the conveyor case due to the blow from the tilted slit is conveyed toward the bucket elevator side. Is preferable.

The present invention
The bottom of the bucket elevator is provided with an air nozzle that winds the grain remaining on the bottom above the inside of the bucket elevator, and in the automatic cleaning operation, the grain remaining on the bottom of the bucket elevator is removed by the blown air from the air nozzle. It is preferable to wind it up, collect it in a bucket, and discharge it to the outside of the machine.

The present invention
An air nozzle is provided at the bottom of the connecting gutter connecting the lower screw conveyor and the bucket elevator, and in the automatic cleaning operation, the grain remaining inside the connecting gutter due to the blown air from the air nozzle is directed toward the bucket elevator side. It is preferable to carry it.

Further, the present invention
It is preferable to provide a transparent window in the connecting gutter and a light source such as an LED to illuminate the inside.

The present invention
A slot is provided to further carry out the dried grain discharged from the bucket elevator to the next process, and the slot has a screw portion for receiving the dried grain and the dried grain conveyed from the screw portion. It has a slot that carries out the grain of
An air nozzle is provided on the upstream side in the transport direction of the dried grain in the screw portion, and in the automatic cleaning operation, the grain remaining in the screw portion is removed by the blown air from the air nozzle provided on the upstream side in the transport direction. It is preferable to carry it to the unit and carry it out for the next process.

The present invention
A slot is provided to further carry out the dried grain discharged from the upper discharge port of the bucket elevator to the next process, and the slot is conveyed from the screw portion for receiving the dried grain and the screw portion. The screw portion has a thrower portion for carrying out the dried grain, the screw portion has a screw for transporting the dried grain received in the slotter screw case to the lower portion, and the lower portion has a slotter case from the screw portion. There is a thrower impeller that lifts the dried grain that has been transported to and carries it out to the next process.
An air nozzle is provided on the upstream side of the thrower screw case in the screw portion in the transport direction of the dried grain, and the automatic cleaning operation is performed by blowing air from the air nozzle provided on the upstream side in the transport direction. It is preferable to transport the grain remaining in the slot screw case to the slot case of the slot portion and carry it out to the next process by the slot impeller.

The present invention
It is preferable to provide a plurality of the air nozzles on the side surface of the thrower screw case on the upstream end side along the shape of the bottom. Further, it is preferable that the air nozzle intermittently blows air.

The present invention is configured such that when the control unit performs an automatic cleaning operation in the automatic cleaning operation mode before the grain loading operation when the variety brand of the grain to be loaded this time and the variety brand of the grain to be loaded last time are different. Therefore, since the automatic cleaning operation is performed only when the product type brand is different from the previous time, it is possible to prevent the accident of mixing different product type brands without lowering the drying work efficiency as compared with the case of cleaning each time.

In the present invention, if a registration unit for registering grain varieties and brands is provided and the input setting of the varieties and brands to the input setting unit is selected from a plurality of varieties and brands registered in advance in the registration unit, the present invention is performed. It is possible to save the trouble of input setting by touch panel etc. every time the grain is put into the dryer and prevent mistakes in input setting.

According to the present invention, in the case of a grain dryer that can be monitored via the Internet or the like, if the input setting of the product type is performed through a communication means, the input setting can be made from a remote location by a mobile terminal or the like.

In the present invention, the bottom surface of the conveyor case of the lower screw conveyor is a porous wall surface, and a long blower box is provided in contact with the porous wall surface and a fan for blowing air is provided inside the blower box, while the porous wall surface is provided. In the automatic cleaning operation, the grain remaining in the conveyor case due to the blown air from the inclined slit is directed toward the bucket elevator side. If it is transported by conveyor belt, it will be possible to automatically discharge the grains remaining in the machine without human intervention.

Further, the bottom of the bucket elevator is provided with an air nozzle that winds up the grain remaining in the bottom above the inside of the bucket elevator, and the automatic cleaning operation remains at the bottom of the bucket elevator by the blown air from the air nozzle. If the grain is rolled up, collected in a bucket, and discharged to the outside of the machine, the grain remaining in the machine can be automatically discharged without human intervention.

Further, an air nozzle is provided at the bottom of the connecting gutter connecting the lower screw conveyor and the bucket elevator, and in the automatic cleaning operation, the grain remaining inside the connecting gutter due to the blown air from the air nozzle is sent to the bucket elevator side. If it is transported toward, it will be possible to automatically discharge the grain remaining in the machine without human intervention.

If a transparent window is provided in the connecting gutter and a light source such as an LED that illuminates the inside is provided, the cleaning state of the grain remaining inside the connecting gutter can be visually confirmed from the transparent window.

The present invention is provided with a slot that further carries out the dried grain discharged from the bucket elevator to the next step, and the slot is conveyed from the screw portion that receives the dried grain and the screw portion. It has a slot for carrying out the dried grains.
An air nozzle is provided on the upstream side in the transport direction of the dried grain in the screw portion, and in the automatic cleaning operation, the grain remaining in the screw portion is removed by the blown air from the air nozzle provided on the upstream side in the transport direction. If the grain is transported to the section and transported to the next process, the grain remaining in the machine can be automatically discharged without human intervention.

If a plurality of the air nozzles are provided on the side surface of the thrower screw case on the upstream end side along the shape of the bottom, the cleaning property can be improved.

Further, if the air nozzle is intermittently blown, the cleanability can be improved as compared with the case where the blown continuously is blown.

It is an overall perspective view of the grain dryer in embodiment of this invention. It is a front sectional view of the grain dryer of FIG. It is explanatory drawing of an example of the initial screen of an operation part. It is explanatory drawing of an example which registers a grain grade brand. It is a front sectional view of the lower screw conveyor. It is a top view of the bottom surface of the conveyor case of the lower screw conveyor. FIG. 6 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing of the connecting gutter which connects the transport end part of the lower screw conveyor, and the supply port of a bucket elevator. It is a schematic side sectional view of the slot. 9 is a cross-sectional view taken along the line BB of FIG.

An embodiment of the present invention will be described.
FIG. 1 shows an overall perspective view of a grain dryer according to an embodiment of the present invention. FIG. 2 shows a front sectional view of the grain dryer of FIG.
The grain dryer 1 according to the embodiment of the present invention includes a lower grain drying section 3 and a grain storage section 2 mounted on the grain drying section 3, and the inside of the grain drying section 3 is located in the center portion in the front-rear direction. A hot air chamber 4 is formed, and a pair of exhaust chambers 5 are provided on both sides of the hot air chamber 4 with the hot air chamber 4 interposed therebetween. A pair of grain drying chambers 6 connected to the reservoir 2 are formed. The front end surface of the hot air chamber 4 is connected to a burner (not shown) as a hot air generator, and the hot air generated by the burner is supplied into the hot air chamber 4. The grain drying chamber 6 is formed by a porous wall (screen), and hot air in the hot air chamber 4 passes through the grain drying chamber 6 and flows into the exhaust chamber 5, and is discharged to the outside by an exhaust blower described later. It is configured to be exhausted.

A burner box 8 containing the burner is arranged on the front wall of the grain drying portion 3, while the back wall of the grain drying portion 3 covers a pair of exhaust ports 14 on the rear end surface of the exhaust chamber 5. A fan box 15 is provided as described above, and a blower (not shown) is attached to the central portion of the fan box 15. Further, a control box (not shown) having a built-in control unit is housed in the burner box 8, and the cover body 8a on the front side thereof is composed of a liquid crystal touch panel electrically connected to the control box and the like. The operation unit 7 is provided.

The bucket erator 9 is erected close to one side of the burner box 8. The bucket elevator 9 lifts grains that have passed through the grain drying chamber 6 into the grain storage section 2.
A rotary valve 11 that is intermittently driven to allow the grains in the grain drying chamber 6 to flow down is horizontally installed at the lower end of the grain drying chamber 6, and falls from the rotary valve 11 at the bottom of the grain drying chamber 3. A grain collecting hopper 12 for receiving the grain to be grain is provided, and a lower screw conveyor 13 is horizontally provided at the center of the grain collecting hopper 12. A connecting gutter 10 for connecting the transport end portion of the lower screw conveyor 13 and the supply port of the bucket elevator 9 is provided.

A motor 9a for driving the bucket elevator 9 is provided on the upper part of the bucket elevator 9, and the discharge portion thereof is lateral to the top plate portion of the grain storage portion 2 by switching a switching valve (not shown). It is connected to the upper screw conveyor 19 to be installed or a discharge unit (not shown) to the outside of the machine. A rotary dispersion board 16 for evenly charging grains into the grain storage section 2 is rotatably installed at the transport end portion of the upper screw conveyor 19.

FIG. 3 shows an explanatory diagram of an example of the initial screen of the operation unit. FIG. 4 shows an explanatory diagram of an example of registering a grain grade brand.
The grain dryer 1 according to the embodiment of the present invention includes a registration unit for storing and registering a variety brand of grains to be dried in advance.
As shown in FIG. 3, when the "tension" button 22a displayed on the initial screen of the touch panel 7a is selected in the operation unit 7 while the operation of the dryer is stopped, the touch panel 7a is displayed in the left column of FIG. The "Grain Type Setting" screen is displayed as shown.

Next, select the grain type on the "grain type setting" screen. Here, select "fir".
When "fir" is selected on the "grain type setting" screen, the "variety brand selection" screen is displayed on the touch panel 7a. Here, because of the initial settings, each field on the "Selection of product type" screen is blank.

Then, the process proceeds to the "Register product type" screen, and the product type of "Fir" is registered. Here, after inputting "Koshihikari" on the touch panel 7a, the "register" button is selected, and the variety brand "Koshihikari" of "fir" is registered in the registration unit.
After that, on the "type / brand selection" screen displayed on the touch panel 7a, the type / brand of "fir" registered in the registration unit is displayed. Here, two types of "fir" that have been registered in the registration unit are displayed.

The grain dryer 1 according to the embodiment of the present invention has specifications that can be monitored via the Internet or the like, and the grain variety brand can be registered from a remote location by a mobile terminal or the like through a communication means such as the Internet.
When registering a grain variety brand using the mobile terminal or the like, as shown in the right column of FIG. 4, for example, the variety brand can be registered for each of a plurality of dryers.
First, on the "dryer selection" screen displayed on the operation screen of the mobile terminal or the like, a dryer for registering the grain variety brand is selected. Here, "Unit 1" is selected.

When "Unit 1" is selected on the "Dryer selection" screen, the "Category brand selection" screen is displayed next. Here, because of the initial settings, each field on the "Selection of product type" screen is blank.
Then, the process proceeds to the "Enter variety brand" screen, and the grain variety brand is registered. Here, "Koshihikari" is input to register the variety brand of "fir", the "input complete" button is selected and transmitted to the "Unit 1" of the grain dryer through the communication means, and the above "1" is transmitted. Register the "fir" variety brand in the registration section of "Unit".

Although the "grain type setting" screen is omitted here, the grain type can be selected on the "grain type setting" screen. Further, after the grain variety brand is registered in the registration unit of each grain dryer through the communication means, the variety brand registered in the registration unit is displayed on the "variety brand selection" screen.

The grain dryer 1 in the embodiment of the present invention is provided with an automatic cleaning operation mode in which the grain remaining in the machine is discharged to the outside of the machine after the operation of discharging the dried grains to the outside of the machine is completed in the control unit.
Further, the grain dryer 1 includes an input setting unit for inputting and setting a variety brand of the grain to be squeezed, and a comparison unit for comparing the variety brand input and set this time with the variety brand previously input and set in the input setting unit. ..

Prior to the grain filling operation, the operator selects the "stretching" button 22a displayed on the initial screen of the touch panel 7a shown in FIG. Input settings are made in the input setting section. At that time, if it is registered in the registration unit in advance, it can be selected from the "type and brand selection" screen displayed on the touch panel 7a and input and set in the input setting unit. Further, if it is not registered in the registration unit, it can be input and set in the input setting unit by newly inputting a product type brand from the "product type brand registration" screen. It is assumed that the product type brand newly input from the "product type brand registration" screen can be selectively registered in the registration unit, and when registered, it is selected from the "product type brand selection" screen and input and set in the input setting unit. It may be that.

After inputting and setting the variety brand of the grain to be put into the dryer in the input setting unit, the comparison unit compares the variety brand input and set this time in the input setting unit with the variety brand previously input and set. Then, as a result of comparison in the comparison unit, when these two types of brands are different, the control unit performs an automatic cleaning operation in the automatic cleaning operation mode before the grain loading operation.

Since the grain dryer 1 in the embodiment of the present invention performs the automatic cleaning operation in the automatic cleaning operation mode at the timing when the type and brand of the grain to be dried is switched, the drying work efficiency is not lowered as compared with the case of cleaning each time. It is possible to prevent accidental mixing of different types of brands.

Further, since the input setting of the grain variety brand to be put into the dryer can be selected from a plurality of variety brands registered in advance in the registration unit, the input can be made by the touch panel 7a or the like. You can save time and prevent typos.

Further, if the specifications are such that the operation unit 7 can be monitored by the Internet or the like and the operation unit 7 can be accessed by a mobile terminal or the like through a communication means such as the Internet, the grain type brand to be put into the dryer can be transferred to the input setting unit from a remote location. Input settings can be made and convenience is improved.

When the operation unit 7 can be accessed by a mobile terminal or the like, the user can register field data including GPS information, scheduled cutting date and time, etc. in the dryer in addition to the grain variety brand. Further, at the time of cutting or at the timing of transporting the cut grain, it is also possible to select a dryer to be loaded and input and set the type and brand of the grain to be loaded in the input setting unit.

When the grain type brand to be next-filled is input and set in the input setting unit at the timing during the discharge operation of the grain dryer 1 by the mobile terminal or the like, the comparison unit is currently discharging from the dryer. If the grain is different from the variety brand that was previously input and set in the input setting unit, for example, the number of grains measured by the automatic moisture meter is less than the specified number (for example, 5 grains in 4 minutes). When the following) is satisfied, it can be determined that the discharge of the dried grain has been completed, and the automatic cleaning operation by the automatic cleaning operation mode can be performed.

Further, when the grain type brand to be put in next time is input and set in the input setting unit at the timing during the drying operation of the grain dryer 1 by the mobile terminal or the like, the comparison unit is currently drying in the dryer. If the grain is compared with the variety brand that was previously input and set in the input setting unit, and if these two variety brands are different, for example, after the automatic moisture meter detects the dryness of the grain and shifts to the discharge operation. Similar to the above, for example, when the number of grains measured by the automatic moisture meter is less than a predetermined number (for example, 5 grains or less in 4 minutes), it is judged that the discharge of the dried grains is completed, and the automatic cleaning operation is performed. Can be done.

FIG. 5 shows a front sectional view of the lower screw conveyor. FIG. 6 shows a plan view of the bottom surface of the conveyor case of the lower screw conveyor as viewed from the side. FIG. 7 is a sectional view taken along the line AA of FIG. 6 and shows a side sectional view of the bottom surface of the conveyor case of the lower screw conveyor.
The bottom surface 32 of the conveyor case 31 of the lower screw conveyor 13 is a porous wall surface, and a long blower box 33 is provided in contact with the lower surface of the porous wall surface, while a fan that blows air into the inside of the blower box 33 (FIG. Not shown). Here, an example of blowing air from the side to the blower box 33 is shown. The perforated wall surface is an inclined slit 34 in which the air blown by the fan blows in the transport direction of the lower screw conveyor 13.

The grain dryer 1 according to the embodiment of the present invention directs the grain remaining in the conveyor case 31 due to the blowing air from the inclined slit 34 toward the connecting gutter 10 and the bucket elevator 9 side by the automatic cleaning operation. Since it can be transported, it is possible to automatically discharge the grain remaining in the machine without human intervention.

FIG. 8 shows a cross-sectional view of a connecting gutter connecting the transport end of the lower screw conveyor and the supply port of the bucket elevator.
At the bottom of the connecting gutter 10 connecting the lower screw conveyor 13 and the bucket elevator 9, an air nozzle 36 for transporting grains remaining at the bottom of the connecting gutter 10 toward the bucket elevator 9 is provided.
Further, an air nozzle 38 is provided at the bottom of the bucket elevator 9 to wind up the grain remaining on the bottom of the bucket elevator 9 above the inside of the bucket elevator 9.

Since the grain dryer 1 in the embodiment of the present invention can send the grain remaining at the bottom of the connecting gutter 10 toward the bucket elevator 9 by the blown air from the air nozzle 36 by the automatic cleaning operation. Grains remaining on the plane can be automatically discharged without human intervention.
Further, the grain dryer 1 according to the embodiment of the present invention winds up the grain remaining at the bottom of the bucket elevator 9 by the blowing air from the air nozzle 38 by the automatic cleaning operation, collects the grain in the bucket, and discharges the grain to the outside of the machine. Therefore, it is possible to automatically discharge the grain remaining in the machine without human intervention.

If a transparent window (not shown) is provided in the connecting gutter 10 and a light source such as an LED for illuminating the inside is provided, the state of cleaning the grains remaining inside the connecting gutter 10 from the transparent window can be checked. It can be visually confirmed.

FIG. 9 shows a schematic side sectional view of the slotter. FIG. 10 is a sectional view taken along the line BB of FIG. 9 and shows a schematic front sectional view of the slot portion.
In the grain dryer 1 according to the embodiment of the present invention, a slotter 40 is provided on the upper side surface of the machine body to carry out dried grains toward the next step, and the bucket elevator 9 is switched by switching the switching valve (not shown). The discharge portion of the above can be connected to the throttle 40.

The thrower 40 has a screw portion 41 for receiving the dried grain and a thrower portion 46 for carrying out the dried grain. The screw portion 41 is provided with a hopper-shaped thrower screw case 42 and a thrower screw 43 that conveys the dried grain received in the thrower screw case 42 to the thrower portion 46.
Further, the thrower portion 46 is provided with a thrower case 47 having a substantially circular cross section and a thrower impeller 48 that lifts the grain transported from the screw portion 41 to the thrower case 47 and carries it out to the next process.
Then, an air nozzle 44 is provided on the side surface of the screw portion 41 on the upstream side in the transport direction of the dried grain of the thrower screw case 42.

In the grain dryer 1 according to the embodiment of the present invention, the grain that remains in the thrower screw case 42 of the screw portion 41 due to the blown air from the air nozzle 44 by the automatic cleaning operation is removed from the grain that remains in the thrower case 42 of the thrower portion 46. And can be carried out to the next process by the thrower impeller 48, so that the grain remaining in the machine can be automatically discharged without human intervention.

Here, a plurality, for example, three of the air nozzles 44 can be provided on the side surface of the thrower screw case 42 on the upstream side in the transport direction along the bottom shape of the thrower screw case 42.
If a plurality of the air nozzles 44 are provided on the side surface of the thrower screw case 42 on the upstream side in the transport direction along the bottom shape, the cleaning property can be improved.

Further, the air nozzle 44 can intermittently blow air for 1 minute at intervals of 3 seconds, for example.
If the air nozzle 44 is used to blow air intermittently, the cleaning performance can be improved as compared with the case where the air blown continuously.

In the embodiment of the present invention, the grain dryer 1 can automatically discharge grains remaining in the lower screw conveyor 13, the connecting gutter 10, the bucket elevator 9, and the slot 40 by the automatic cleaning operation. However, the present invention is not limited to this, and other constituent parts can be automatically cleaned.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and its configuration can be appropriately changed as long as it does not deviate from the scope of the invention.

The present invention provides a grain dryer having an automatic cleaning operation mode in which different kinds of brands are not mixed in the drying work of grains such as paddy rice without delaying the drying work, which is extremely useful. be.

1 Grain dryer 2 Grain storage 3 Grain drying section 4 Hot air chamber 5 Blowout chamber 6 Grain drying chamber 7 Operation unit 7a Touch panel 8 Burner box 8a Cover body 9 Bucket elevator 9a Motor 10 Connection gutter 11 Feeding valve 12 Grain collection hopper 13 Lower screw conveyor 14 Blower port 15 Fan box 16 Rotating disperser 17 Blower fan 19 Upper screw conveyor 22 Operation selection button 22a Extension button 31 Conveyor case 32 Bottom 33 Blower box 34 Inclined slit 36 Air nozzle 38 Air nozzle 40 Slower 41 Screw part 42 Slower screw case 43 Slower screw 44 Air nozzle 46 Slower part 47 Slower case 48 Slower impeller

Claims (9)

A grain storage section is provided on the grain drying section, and a bucket elevator is erected to connect the lower screw conveyor located horizontally at the bottom of the grain drying section and the upper screw conveyor located horizontally above the grain drying section. The grain dryer is equipped with an automatic cleaning operation mode in which the control unit of the grain dryer discharges the grains remaining in the machine to the outside of the machine after the work of discharging the dried grains to the outside of the machine is completed. In a grain dryer
The control unit is characterized in that when the variety brand of the grain to be loaded this time and the variety brand of the grain to be loaded last time are different, the automatic cleaning operation by the automatic cleaning operation mode is performed before the grain loading operation. Grain dryer. An input setting unit for inputting and setting the grain type brand to be put into the dryer and a comparison unit for comparing the variety brand input and set this time with the type brand previously input and set are provided in the input setting unit. The grain dryer according to claim 1, wherein when the two varieties are different from each other as a result of comparison, the control unit performs the automatic cleaning operation before the grain loading operation of the varieties brand input and set this time. Further, the grain according to claim 2, wherein a registration unit for registering a variety brand of a grain is provided, and input setting of the variety brand to the input setting unit is performed by selecting from a plurality of variety brands registered in advance in the registration unit. Dryer. The grain dryer according to claim 2 or 3, wherein the input setting of the product type brand to the input setting unit is performed through a communication means. The bottom surface of the conveyor case of the lower screw conveyor is a porous wall surface, and a long blower box is provided in contact with the porous wall surface and a fan for blowing air is provided inside the blower box, while the porous wall surface is blown by the fan. Does not have an inclined slit that blows in the transport direction of the lower screw conveyor, and the automatic cleaning operation requests that the grain remaining in the conveyor case due to the blow from the tilted slit be conveyed toward the bucket elevator side. Item 4. The grain dryer according to any one of Items 1 to 4. The bottom of the bucket elevator is provided with an air nozzle that winds up the grain remaining in the bottom above the inside of the bucket elevator, and the automatic cleaning operation is performed by blowing air from the air nozzle provided at the bottom of the bucket elevator. The grain dryer according to any one of claims 1 to 5, wherein the grain remaining at the bottom of the elevator is rolled up, collected in a bucket, and discharged to the outside of the machine. An air nozzle is provided at the bottom of the connecting gutter connecting the lower screw conveyor and the bucket elevator, and in the automatic cleaning operation, the grain remaining inside the connecting gutter due to the blown air from the air nozzle provided at the bottom of the connecting gutter. The grain dryer according to any one of claims 1 to 6, wherein the gutter is conveyed toward the bucket elevator side. The grain dryer according to claim 7, wherein the connecting gutter is provided with a transparent window and a light source for illuminating the inside of the connecting gutter. A slot is provided to further carry out the dried grain discharged from the bucket elevator to the next process, and the slot has a screw portion for receiving the dried grain and the dried grain conveyed from the screw portion. It has a slot that carries out the grain of
An air nozzle is provided in the screw portion on the upstream side in the transport direction of the dried grain, and the automatic cleaning operation remains in the screw portion due to a blown air from the air nozzle provided on the upstream side in the transport direction of the dried grain. The grain dryer according to any one of claims 1 to 8, wherein the grain to be used is transported to the slotter and carried out to the next process.

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