JPH06101969A - Drying air guide control method for grain dryer - Google Patents

Abstract

PURPOSE:To change the passing direction of drying air which passes through a grain drying chamber installed in a slanted state and enhance the efficiency of grain drying operation by varying the moisture of grains to be dried. CONSTITUTION:The passing directions of drying air which passes through each drying chamber 9 installed in a slanted state are changed by controlling based on the moisture of the grains on/off operations of front and rear on/off valves 27 for air supply service and front and rear on/off valves 35 for the central exhaust chamber and front and rear on/off valves 37 for the both sided exhaust chambers, which are all installed so as to open freely, to start and end terminals of each air supply chamber 14, a central exhauster chamber 10 and exhauster chambers 12 on both sides. When the grains contain a high moisture, the drying air which passes through each of the slanted grain drying chambers 9 is arranged to pass upward, thereby heating up each of ventilation nets 11 and 13. This constitution makes it possible to prevent water drops from adhering to the surface of each of the nets 11 and 13 and hence the drying efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying air guide control system for a grain dryer.

[0002]

2. Description of the Related Art Conventionally, a ventilation net for a blower chamber forming a diamond-shaped blower chamber on the lower left and right sides of an upper grain storage chamber and a central exhaust air forming a central central exhaust chamber Between the room ventilation network and the left and right ventilation chambers forming left and right triangular ventilation chambers on the left and right sides, a Y-shaped grain drying chamber is provided and each of the drying chambers is provided. A feeding valve for feeding grains is rotatably supported at the lower portion, and a lower transfer spiral that is connected to a falling shelf inclined downward from both left and right sides toward the center is rotatably supported at the lower side of each drying chamber. Providing a supported grain collecting gutter, a drying air device for generating a drying air is provided on the lower side of the falling shelf in the machine wall, and a hopper for tensioning the grain is provided on the machine wall portion on the lateral side. The dry air generated by the dry air device is sucked and exhausted to the outside of the machine from the air blowing chambers through the drying chambers, the central air exhaust chamber and the left and right air exhaust chambers. The 燥穀 grain moisture, ventilating direction of the drying air is not changed, was scheme drying is ventilation a fixed direction.

[0003]

The grain supplied from the extension hopper on the side wall of the grain dryer is conveyed to the upper part and stored in the grain storage chamber. When this grain is started to be dried, the grain accommodated in the storage chamber is fed from the storage chamber in the grain drying chamber by the rotation drive of the feeding valve, and is fed down into the collecting trough by flowing down the falling shelf. While being circulated in the storage chamber, the dry air generated from the dry air device passes through the respective drying chambers from each air blowing chamber, passes through the central air exhaust chamber and the left and right air exhaust chambers, and is sucked out of the machine. By doing so, the grains flowing down in each of these drying chambers are exposed to this dry air and dried, and when the grain moisture reaches the finishing target moisture, the dryer is stopped and controlled, and the grain Drying is stopped.

During this drying operation, if the moisture content of the grain to be dried is a high moisture grain, the drying air passes from the top to the bottom so that the respective ventilation on the lower side forming the respective drying chambers. Water droplets may adhere to the mesh, and on the ventilation nets for the central exhaust chambers that form the central exhaust chamber and on the ventilation nets for the left and right exhaust chambers that form the left and right exhaust chambers. Grains flowing down may cause poor grain flow due to the adhered water droplets, and this poor flow may cause uneven drying of the grains and deteriorate grain quality. However, we are trying to eliminate this.

[0005]

According to the present invention, there are rhombus-shaped blower chambers 14, 14 on both left and right sides below the upper grain storage chamber 8.
Forming a ventilation chamber ventilation network 15 and a central triangular ventilation chamber 10 forming a central triangular ventilation chamber 10, and forming left and right triangular ventilation chambers 12 and 12 on the left and right sides Two rows of Y-shaped grain drying chambers 9, 9 are provided between the left and right ventilation chamber ventilation nets 13, 13, and a feeding valve 16 for feeding grains is provided below each of the drying chambers 9. Rotatably rotatably supporting the lower part of the drying chamber 9 and the lower transfer spiral 19 connected to the falling shelves 18 and 18 sloping downward from the left and right sides toward the central part. 17 is provided, a drying air device 3 for generating a drying air is provided below the falling shelves 18 in the machine wall 5, and a hopper 20 for stretching grains is provided on the machine wall 5 on the lateral side. Front and rear blast chambers that are provided and can be opened and closed at the start and end portions of the blast chambers 14, 14, the central blast chamber 10, and the left and right blast chambers 12, 12. Closed 27 and 28, before a central exhaust air room,
In the grain dryer provided with the rear opening / closing valves 35, 36 and the front / rear opening / closing valves 37, 38 for the left and right air exhaust chambers, when the dry grain water content is equal to or higher than a predetermined water content, the dry air is blown to the central exhaust air. Wind chamber 1
0 and the left / right air exhaust chambers 12, 12 are controlled so as to ventilate each of the drying chambers 9 and suck and exhaust them to the outside of the machine through the air blowing chambers 14, 14, and the moisture content of the dry grain is not more than a predetermined moisture content. When
The dry air is blown from the blower chambers 14 and 14 to the drying chambers 9 and the central exhaust chamber 10 and the left and right exhaust chambers 12 and 12
Front / rear open / close valve 2 for the blower chamber to suck and exhaust air outside the machine
7, 28, the front / rear opening / closing valves 35, 36 for the central exhaust chamber and the front / rear opening / closing valves 37, 38 for the left / right exhaust chambers are controlled to open and close to ventilate the drying chambers 9. The configuration of a dry air guide control method is characterized by changing and controlling the ventilation direction of the dry air.

[0006]

[Advantages of the Invention] The hopper 2 for the side wall 5 of the grain dryer.
The grain supplied from 0 is conveyed to the upper part and stored in the grain storage chamber 8. When you start drying this grain,
When the grain water content is detected and the detected grain water content is equal to or higher than a predetermined water content, the drying air generated from the drying air device 3 is used as a blower chamber rear opening / closing valve 28, a central exhaust chamber front opening / closing valve 35, and left·
The front opening / closing valves 37, 37 for the right air exhaust chamber are controlled to open, respectively, and the front opening / closing valve 27 for the air blowing chamber and the rear opening / closing valve 3 for the central exhaust chamber
6 and the left / right air exhaust chamber rear open / close valves 38, 38 are controlled to be in the closed state, whereby the dry air flows from the central air exhaust chamber 10 and the left / right air exhaust chambers 12, 12 to the drying chambers 9 respectively. Through the blower chambers 14, 14 to be sucked and discharged to the outside of the machine, so that the inside of each grain drying chamber 9 is fed out from the storage chamber 8
Of the drying chamber 9 while being fed by the rotation drive of the above, flowing down the falling shelves 18 and 18 and being supplied into the grain collecting gutter 17 and being transferred by the lower transfer spiral 19 and being circulated in the storage chamber 8. The grains flowing down are exposed to this drying air and dried.

At the start of this drying operation, or during the drying operation, when the moisture content of the dried grain is detected to be equal to or lower than a predetermined water content, the drying air generated from the drying air device 3 causes the front opening / closing valve 27 for the air blowing chamber. , The central exhaust chamber rear on-off valve 36 and the left and right exhaust chamber rear on-off valves 38, 38 are controlled to open states, respectively, and the blower chamber rear on-off valve 28 and the central exhaust chamber The front opening / closing valve 35 and the front opening / closing valves 37, 37 for the left and right exhaust air chambers are controlled to be in a closed state, whereby the dry air is blown into the air blowing chambers 14, 14 respectively.
Being passed through each of the drying chambers 9 through the central exhaust chamber 10 and each of the left and right exhaust chambers 12 and 12 to be sucked and exhausted to the outside of the machine to flow down in each of the drying chambers 9. The grain is exposed to the dry air and dried, and when the moisture content of the grain reaches the finishing target moisture content, the dryer is automatically stopped and controlled, and the drying of the grain is stopped.

[0008]

According to the present invention, in the case of high-moisture grains having a predetermined moisture content or more, each grain drying chamber 9 provided in an inclined state is provided.
The dry air passing through passes from the bottom to the top, and when low moisture below the predetermined moisture is detected in the grain being dried, it is changed to the passage from the top to the bottom to Ventilation net 11 for the central exhaust chamber and left / right exhaust chamber 1 forming the drying chamber 9
The grains flowing down on the left and right ventilation chamber ventilation nets 13 and 13 forming 2, 12 have a high moisture content, and the dry air passes from the bottom to the top so that the ventilation nets 11 and 13 respectively. ，
13 will be heated and water droplets will be generated in each of these ventilation nets 1.
1,13,13 did not adhere to the surface of the grain, so that unevenness in drying of the grain due to poor grain flow was eliminated, and deterioration of the grain quality could be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The illustrated example is a circulation type grain dryer 1 for drying grains.
It shows a state in which the burner 4 and the like are attached to the moisture sensor 2 for detecting the moisture of the grain and the drying air device 3 for generating the drying air.

The dryer 1 has a rectangular shape that is long in the front-rear direction and has a transfer gutter 6 and a ceiling plate 7 in which a transfer spiral is rotatably installed on the upper part of the machine wall 5, and below the ceiling plate 7 is a grain. A grain storage chamber 8 for storing grains is formed. Grain drying room 9
In the lower side of the storage chamber 8, the central ventilation chamber ventilation networks 11, 11 forming the central triangular ventilation chamber 10 and the triangular left and right ventilation chambers 12, 12 on the left and right sides are formed. Ventilation nets 13 for forming left and right exhaust chambers, and ventilation nets 15, 1 for blowing chambers forming rhombus-shaped ventilation chambers 14, 14 on both left and right sides
5 are provided in two rows in a Y-shape between them, and below these drying chambers 9 and 9, feeding valves 16 for feeding and dropping grains are rotatably supported respectively, and a feeding valve motor 16 'is used to reduce the speed. It is rotationally driven via.

The grain collecting gutter 17 is communicated with the falling shelves 18 and 18 which are inclined downward from the left and right sides toward the central portion, and a lower transfer spiral 19 is rotatably supported in the central portion, and the drying chambers 9 are provided. , 9 are provided on the lower side to communicate with each other. Saddle hopper 20
Is provided on the lateral side machine wall 5 on one side so as to be openable and closable, and the grain is flowed down and fed into the grain collecting trough 17 by the open state of the tension hopper 20.

The drying passage chamber cover 21 has the front side machine wall 5
The drying passage chamber 22 is formed on the outer side so as to be vertically separated and detachably provided to communicate with the blower chambers 14, 14, the central exhaust chamber 10, and the left and right exhaust chambers 12, 12. It is configured to do. Further, the exhaust passage chamber cover 23 is detachably provided on the outer side of the rear side machine wall 5 to form an exhaust passage chamber 24, and the exhaust chambers 14, 14, the central exhaust chamber 10, and the left side are formed.・
It is configured to communicate with the right air exhaust chambers 12, 12.

The exhaust fan 25 is provided on the central rear side exhaust cylinder 26 of the exhaust passage chamber cover 23, and the exhaust fan 25 is rotationally driven by an exhaust fan motor 26 '. The front / rear open / close valves 27, 28 for the blower chamber are vertically divided into a plurality of parts at the start end and the end of the blower chambers 14, 14 in the drying passage chamber 22 and the exhaust passage chamber 24. The front and rear support shafts 29 and 30 are freely rotatable, and the front and rear support shafts 29 and 30 are individually connected by front and rear connection rods 31 and 32 to connect the front and rear connection shafts. The rods 31 and 32 are configured to move up and down by the operation of the front and rear solenoids 33 and 34,
When the front and rear solenoids 33 and 34 are operated, the front and rear support shafts 29 and 30 are rotated through the front and rear connecting rods 31 and 32 to rotate the front and rear opening / closing valves 27 for the blower chambers. , 28 are opened and closed to open and close the start and end portions of the blower chambers 14, 14, and the vertical direction of passage of the dry air passing through each of the drying chambers 9 is changed.

The front / rear open / close valves 35, 36 for the central exhaust chamber and the front / rear open / close valves 37, 38 for the left / right exhaust chambers are provided in the drying passage chamber 22 and the exhaust passage chamber 24, respectively. The central exhaust chamber 10 and the left and right exhaust chambers 12 and 12 are divided into a plurality of vertical front and rear end portions which are rotatable, respectively.
The front and rear exhaust air support shafts 39 and 40 are fixed to the rear exhaust air support shafts 39 and 40, and these front and rear exhaust air support shafts 39 and 40 are individually connected to each other.
The front and rear exhaust air connecting rods 41 and 42 are connected by 2
It is configured to move up and down by the operation of the front / rear exhaust air solenoids 43, 44, and by the operation of the front / rear exhaust air solenoids 43, 44 via the front / rear exhaust air connecting rods 41, 42. Rotation of the front / rear exhaust air support shafts 39, 40 opens / closes the central exhaust chamber front / rear open / close valves 35, 36 and the left / right exhaust air front / rear open / close valves 37, 38. The central exhaust chamber 10 and the left and right exhaust chambers 12 and 12 are opened and closed at the starting end and the end, and the vertical direction of passage of the dry air passing through each of the drying chambers 9 Is configured to be changed.

The burner 4 of the dry air device 3 is detachable by being slidably held in the front-rear direction by a burner holding frame or the like below the downflow shelf 18 on one side in the lateral machine wall 5. It is provided in. The burner 4 includes a combustion section, a blower tube section, a filter section, a blower, a fuel valve, a fuel pump, and the like, and the combustion air corresponding to the supplied fuel amount is blown with the blower motor controlling the rotation of the blower. In addition, the dry air (hot air) having a predetermined temperature is generated.

The operating device 45 includes the drying passage chamber cover 2
1 is detachably attached to the front side of the upper part, and the operating device 45 and the upper part of the drying passage chamber cover 21 are covered with an outer cover 46. The diffusion plate 47 is provided at the center of the bottom plate of the transfer gutter 6 in the front-rear direction and below the supply port for supplying the transfer grains to the storage chamber 8, and uniformly diffuses and reduces the grains into the storage chamber 8. ing.

The grain raising machine 48 is provided outside the front side of the front side machine wall 5 and has a belt with a bucket conveyor 49 stretched inside, and the upper end portion is thrown between the transfer gutter 6 and the starting end portion. An outlet pipe 50 is provided for communication, and a lower end portion thereof is provided with a supply gutter 51 for communication with the terminal end portion of the grain collecting gutter 17. The sublimator motor 52 uses the bucket conveyor 4
The belt with 9 and the transfer spiral in the transfer gutter 6, the diffusion plate 47 and the lower transfer spiral 19 in the grain collecting gutter 17 are rotationally driven.

The moisture sensor 2 is provided substantially vertically in the center of the grain raising machine 48. The moisture sensor 2 is rotated by a moisture motor 53 when an electric measurement signal is transmitted from the operating device 45. Each part of the moisture sensor 2 is rotationally driven, and receives the grains falling while being conveyed to the upper portion by the bucket conveyor 49, and crushes the grains by pressing, and detects the moisture of the crushed grains.

The operating device 45 has a box shape, and the dryer 1, the moisture sensor 2 and the burner 4 of the drying air device 3 are attached to the surface plate of the box for drying, discharging and discharging. Each start switch 54 for starting operation for each work, stop switch 55 for stopping operation, moisture setting picker 56 for setting target finishing moisture of grain by operating position, grain for setting hot air temperature generated from the burner 4 by operating position A type setting shift 57, a sticking amount setting shift 58, a display unit 59 for digitally displaying various display items, a monitor display, and the like are provided.

The control device 60 is provided in the operating device 45, and the detection values detected by the moisture sensor 2 and the hot air temperature sensor 61, the operation of the switches 54 and 55, and the setting knobs 56 and 57. , 58, etc. are input, and a CPU 62, etc. for arithmetic and logical operations and comparison operations of these inputs are provided.
6 ', 52, 53, the blower motor, the solenoids 33, 34, 43, 44, the fuel valve, the fuel pump, etc. are started, stopped, and controlled.
Each of the setting knobs 56, 57, 58 is of a rotary switch type, and predetermined numerical values and types are set depending on the operation position.

The guide control of dry air (hot air) by the controller 60 is performed as follows. That is, the drying is started (step 101), and the front opening / closing valve 2 for the blower chamber
7, 27, the rear opening / closing valve 36 for the central exhaust chamber and the left
The rear opening / closing valves 38, 38 for the right air exhaust chamber are controlled to be in an open state, and the rear opening / closing valves 28, 28 for the air blowing chamber, the front opening / closing valve 35 for the central air exhaust chamber, and the front for the left / right air exhaust chambers Open / close valve 37, 37
Is controlled to be in a closed state, and the dry air is blown into each of the blower chambers 14 and 1
4 through the respective drying chambers 9 and the respective exhaust chambers 10, 1
The air is sucked and discharged to the outside of the machine via 2 and 12 (Step 10
2), the moisture content of the grain is detected by the moisture sensor 2 (step 103), and the detected moisture content of the grain is, for example, the CPU 62.
It is detected whether or not it is equal to or more than a predetermined 25% which is set and stored in (step 104), and if YES is detected, the blower chamber front open / close valves 27, 27, the central exhaust chamber rear open / close valve 36, and The left / right exhaust chamber rear open / close valves 38, 38 are controlled to be in a closed state, and the blower chamber rear open / close valves 28, 28, the central exhaust chamber front open / close valve 35, and the left / right exhaust air are controlled. Front open / close valve for room 37,3
7 is controlled to the open state, and the dry air passes from the respective exhaust chambers 10, 12, 12 through the respective drying chambers 9 and the respective air blowing chambers 14, 14 as shown by the arrows of the chain line in FIG. Whether the grain moisture detected by the moisture sensor 2 is equal to or lower than the finishing target moisture (step 106) after being sucked and discharged to the outside of the machine through the exhaust passage chamber 24 (step 105), Yes
When it is detected that the dryer 1 is automatically stopped and controlled, the drying of the grain is stopped (step 107).

If NO is detected in (step 104), the front opening / closing valves 27, 27 for the blower chamber, the rear opening / closing valve 36 for the central exhaust chamber and the rear opening / closing valves 38 for the left / right exhaust chambers, Three
8 is controlled to an open state, and the rear opening / closing valve 28 for the blower chamber,
28, the central exhaust chamber front open / close valve 35 and the left and right exhaust air chamber front open / close valves 37, 37 are controlled to be in a closed state, and the dry air flows in the above-described respective directions as indicated by solid arrows in FIG. Blower room 14,1
4 through the respective drying chambers 9 and the respective exhaust chambers 10, 1
2, 12 and the exhaust air passage chamber 24, and the exhaust air 25 is sucked and exhausted outside the machine (step 108), (step 1
It is configured to proceed to (06) and to return to (step 103) when NO is detected in (step 106).

The control may be performed as in the other embodiment of FIG. That is, the drying is started (step 20).
1), the front opening / closing valves 27, 27 for the blower chamber, the rear opening / closing valve 36 for the central exhaust chamber, and the rear opening / closing valve 3 for the left / right exhaust chambers
8, 38 are controlled to be in an open state, and the blower chamber rear open / close valves 28, 28, the central exhaust chamber front open / close valve 35, and the left / right exhaust chamber front open / close valves 37, 37 are closed. The dry air passes from the air blowing chambers 14, 14 through the air drying chambers 9, passes through the air exhaust chambers 10, 12, 12 and the air exhaust passage chamber 24, and is discharged by the air exhaust unit 25. The air is sucked and discharged to the outside (step 202), and it is detected whether or not a predetermined time (T1) set and stored in the CPU 62, for example, 2 hours has passed (step 203), and if NO is detected, it is continuously dried. The process returns to (step 204) and (step 202). When YES is detected, the front opening / closing valves 27 and 2 for the air blower chamber
7, the central exhaust chamber rear opening / closing valve 36 and the left / right exhaust chamber rear opening / closing valves 38, 38 are controlled to be in a closed state, and the blower chamber rear opening / closing valves 28, 28; The front opening / closing valve 35 for the chambers and the front opening / closing valves 37, 37 for the left and right air exhaust chambers are controlled to be in an open state, and the dry air passes from the respective exhaust chambers 10, 12, 12 through the respective drying chambers 9. Then, the air is sucked and exhausted to the outside by the air blower 25 through the air blow chambers 14 and 14 and the air exhaust passage chamber 24 (step 105), and a predetermined time before the drying finishing time of the grain (T
2) For example, it is detected within 2 hours (step 20).
6) If NO is detected, it is continuously dried (step 20).
7), and returns to (step 205). If YES is detected, the front opening / closing valves 27, 27 for the blower chamber, the rear opening / closing valve 36 for the central exhaust chamber and the rear opening / closing valves 38, 38 for the left and right exhaust chambers are controlled to be in an open state, and The blower chamber rear open / close valves 28, 28, the central exhaust chamber front open / close valve 35, and the left / right exhaust chamber front open / close valves 37, 37 are controlled to be in a closed state, and the dry air is supplied to each of the blower chambers. From each of the chambers 14 and 14 through each of the drying chambers 9, each of the exhaust chambers 1
0, 12, 12 and the exhaust fan 25 through the exhaust passage chamber 24
Is sucked and discharged outside the machine (step 208), and whether the moisture content of the grain detected by the moisture sensor 2 is below the target moisture content for finishing (step 209) or YES is determined, the dryer 1 is automatically stopped. Controlled, grain drying is stopped (step 210).

Further, if NO is detected in (step 209), it is continuously dried (step 211), and (step 20)
It is configured to return to 9). As a result, the dust attached to the lower side of the left / right ventilation chamber ventilation nets 13 and 13 at the time of grain infiltration is dried by the drying air from above the drying chambers 9 at the start of drying. By passing downward, the dry air is removed by the passage of the ventilation nets 13, 13
The clogging is eliminated and the grain drying efficiency is improved.

The operation of the above embodiment will be described below. By operating each setting scoop 56, 57, 58 of the operating device 45 to a predetermined position and operating the start switch 54 for starting the drying operation, each part of the grain dryer 1, the burner 4 of the drying air device 3, and the like. The moisture sensor 2 etc. is started and the burner 4
A dry air (hot air) is generated from this, and the moisture sensor 2 detects the grain moisture, and when the detected grain moisture is equal to or higher than a predetermined moisture, each air blowing chamber rear opening / closing valve 28, the central ventilation chamber front opening / closing Valve 3
5 and the front open / close valves 37 for the left and right exhaust chambers are controlled to be in the open state, and the front open / close valve 27 for each blower chamber, the rear open / close valve 36 for the central exhaust chamber and the rear for each left / right exhaust chamber The on-off valve 38 is controlled to the closed state, and the dry air passes from the central air exhaust chamber 10 and the left and right air exhaust chambers 12, 12 to the grain drying chambers 9 and the air blowing chambers 14 respectively.
Then, the air is sucked and exhausted by the exhaust fan 25 through the exhaust passage chamber 24.

When the detected grain water content is below a predetermined water content or below a predetermined water content during drying, the air blowing chamber front open / close valve 27, the central exhaust chamber rear open / close valve 36 and each of the above The rear opening / closing valves 38 for the left and right exhaust chambers are controlled to be in an open state, and the rear opening / closing valves 28 for the respective ventilation chambers, the front opening / closing valves 35 for the central exhaust chambers and the fronts for the left / right exhaust chambers are controlled. The on-off valve 37 is controlled to be in a closed state, and the dry air passes from the air blowing chambers 14 to the air drying chambers 9 and the central air exhaust chamber 10, the left and right air exhaust chambers 12 and 12, and the exhaust air. The air is sucked and exhausted by the air exhauster 25 through the passage chamber 24.

The grains stored in the grain storage chamber 8 are dried by being exposed to the dry air while flowing down from the storage chamber 8 into the respective drying chambers 9 and are dried by the feeding valves 16 and 16. Is fed to each of the falling shelves 18 and is fed from the grain collecting trough 17 through the supply trough 51 into the grain raising machine 48 by the lower transport spiral 19 and is transported to the upper portion by the bucket conveyor 49 and is thrown out. It is supplied into the transfer gutter 6 via 50, is supplied from the transfer gutter 6 onto the diffusion plate 47 by an upper transfer spiral, is uniformly diffused and reduced into the storage chamber 8 by the diffusion plate 47, and is circulated and dried. It

When the grain moisture detected by the moisture sensor 2 is the same as the finishing target moisture set by operating the moisture setting knob 56, it is detected that the drying is completed, The controller 60 automatically controls the dryer 1 to automatically stop, and the grain drying is stopped.

[Brief description of drawings]

 The figure shows an embodiment of the present invention.

FIG. 1 is an enlarged front view in which a part of the grain dryer is partially broken.

FIG. 2 is an enlarged side sectional view of a part of the grain dryer.

FIG. 3 is an enlarged side sectional view of a part of the grain dryer.

FIG. 4 is a block diagram.

FIG. 5: Flow chart

[Fig. 6] Whole front view of the grain dryer

FIG. 7 is a side sectional view of the whole grain dryer.

FIG. 8: Front sectional view of the operation of the grain dryer

FIG. 9 is a flowchart showing another embodiment of the invention.

[Explanation of symbols]

 3 Dry air device 5 Machine wall 8 Grain storage room 9 Grain drying room 10 Central ventilation chamber 11 Central ventilation chamber ventilation network 12 Left / right ventilation chamber 13 Left / right ventilation chamber ventilation network 14 Ventilation chamber 15 Blower chamber ventilation net 16 Feeding valve 17 Grain collecting gutter 18 Falling shelf 19 Lower transfer gutter 20 Crane hopper 27 Blower chamber front opening / closing valve 28 Blower chamber rear opening / closing valve 35 Central exhaust chamber front opening / closing valve 36 Central exhaust Wind chamber rear open / close valve 37 Left / right exhaust chamber front open / close valve 38 Left / right exhaust chamber rear open / close valve

Claims (1)

[Claims] 1. A ventilation chamber ventilation network 1 which forms diamond-shaped ventilation chambers 14, 14 on both left and right sides below an upper grain storage chamber 8.
5 and a central ventilation chamber ventilation net 11 forming a central triangular ventilation chamber 10 and left and right ventilation chambers forming left and right triangular ventilation chambers 12, 12 on the left and right sides Ventilation network 13,
Two rows of Y-shaped grain drying chambers 9 and 9 are provided between the drying chambers 13 and 13, and a feeding valve 16 for feeding the grains is rotatably supported at the lower portion of each drying chamber 9 so as to be rotatable. 9 On the lower side, there is provided a grain collecting trough 17 which rotatably supports a lower transfer spiral 19 which is connected to the falling shelves 18 which are inclined downward from the left and right sides toward the central portion, and the falling shelves are provided in the machine wall 5. 18 is provided with a drying air device 3 for generating a drying air, and a lateral side of the machine wall 5 is provided with a stretching hopper 20 for stretching grains, and the blowing chamber 14,
14, the central exhaust chamber 10 and the left and right exhaust chambers 12, 12
Front / rear open / close valve 2 for the ventilation chamber that can be opened and closed at the beginning and end of
7,28, the front and rear on-off valves 35 and 36 for the central air exhaust chamber, and the front and rear on-off valves 37 and 38 for the left and right air exhaust chambers. In the above case, the dry air is discharged from the central exhaust chamber 10 and the left / right exhaust chamber 1
2 and 12, the drying chamber 9 is ventilated, and the blowing chambers 14 and 1
4 is controlled so as to be sucked and discharged to the outside of the machine, and when the moisture content of the dried grain is not more than a predetermined moisture content, the dried air is fed into the blower chamber 1
The central exhaust chamber 1 is ventilated from the drying chambers 9 and 4 and 14.
0, and the front / rear open / close valves 27, 28 for the blower chamber and the front / rear open / close valves 35, 36 for the central exhaust chamber to suck and exhaust air to the outside of the machine through the left and right exhaust chambers 12, 12. And opening / closing the front / rear open / close valves 37, 38 for the left / right air exhaust chambers respectively to control the drying chambers 9
A dry air guide control method characterized by changing and controlling a ventilation direction of the dry air that is ventilated.