Grain dryer

Abstract

To provide a grain dryer enabling a worker to easily remove dust present in a grain drying passage.SOLUTION: The grain dryer configured to comprise a grain-storing storage section disposed in the upper side of the dryer, a drying section disposed therebelow, a hot air feeder 6 disposed on the front of the dryer body and a suction exhaust unit 40 disposed on the back thereof, which drying section is provided with a hot air chamber receiving hot air from the hot air feeder 6, an exhaust chamber for the exhaust sucked by the suction exhaust unit 40 to flow therethrough, and a grain drying passage 13 disposed between the hot air chamber and the exhaust chamber to guide the grain received from the storing section, with the grain drying passage 13 being configured to comprise an inner drying net extending across the front / rear direction of the drying section, and an outer drying net, and the outer drying net being configured to tilt toward the inside of the dryer body in the left / right direction, is characterized in that an opening / closing member 41 is provided on a portion of the outer drying net present on the rear side closer to the suction exhaust unit 40 in the longitudinal direction of the grain drying passage 13.SELECTED DRAWING: Figure 18

Description

[Technical field]

[0001] The present invention relates to a grain dryer. [Background technology]

[0002] The grain dryer described in Patent Document 1 is an example in which a far-infrared radiator is installed in the exhaust chamber of the drying section, while the grain dryer described in Patent Document 2 is an example in which a bottom shutter is installed in the conveying gutter at the top of the storage chamber, making it possible to remove residue after the grain is circulated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5228844 [Patent Document 2] Patent No. 4042591 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a grain dryer which can simplify the work of removing dust from the grain drying passage. [Means for solving the problem]

[0005] The invention according to claim 1 is The storage section (2) for storing grain and the drying section (3) are arranged above and below. A hot air supply section (6) is provided at the front of the machine body, and a suction and exhaust section (40) is provided at the rear of the machine body, The drying section (3) is provided with a hot air chamber (11) which receives hot air from the hot air supply section (6), an exhaust air chamber (12) through which exhaust air sucked in by the suction / exhaust section (40) passes, and a grain drying passage (13) which is located between the hot air chamber (11) and the exhaust air chamber (12) and which guides the grain received from the storage section (2); The grain drying passage (13) is composed of an inner drying net and an outer drying net extending in the front-rear direction of the drying section (3), and the outer drying net is inclined toward the inside of the left and right of the machine body, The grain dryer is characterized in that an opening / closing member (41) is provided in a part of the outer drying net on the rear side close to the suction exhaust section (40) in the front-rear direction of the grain drying passage (13).

[0006] The invention according to claim 2 is as follows: The grain dryer according to claim 1, characterized in that an openable window through which outside air can be sucked in by the action of the suction and exhaust part (40) is provided at the front part of the body of the hot air chamber (11) or the exhaust chamber (12).

[0007] The invention according to claim 3 is as follows: The grain dryer according to claim 1 or claim 2 is characterized in that the front and rear ends of the grain drying passage (13) face the front wall (31) and rear wall (32) of the body, respectively, and an inspection window (B) is provided in the front wall (31) or the rear wall (32). Effect of the Invention

[0008] According to the present invention, dust can be easily removed from within the grain drying passage. [Brief description of the drawings]

[0009] [Figure 1] Perspective view of the grain dryer [Diagram 2] Front view of the internal structure of the grain dryer [Diagram 3] Perspective view of the internal device transmission configuration [Figure 4] Enlarged side view of the opening and closing shutter of the conveying spiral gutter [Diagram 5] Oblique view of the main parts on the front side of the drying unit [Figure 6] Front view of the drying section [Figure 7] Side view of the front wall of the drying section [Figure 8] A perspective view of the airflow inside the aircraft through an inspection window [Figure 9] Changeover switch connection diagram [Figure 10] A perspective view of the cleaning window with the air hose arranged therein. [Figure 11] A front perspective view showing the structure of the drying section of a grain dryer [Figure 12] A vertical cross-sectional view showing the inside of the front side of the drying section [Figure 13] A perspective view of the cleaning window (closed) from diagonally below [Figure 14] Enlarged perspective view of the cleaning window (open) from diagonally below [Figure 15] Side view of the cleaning window (closed) (a) and its SS line cross section (b) [Figure 16] Side view of the cleaning window (when open) (a) and its SS line cross section (b) [Figure 17] Enlarged perspective view of the cleaning window (fully open) seen from diagonally below [Figure 18] A perspective view of the main parts of the drying unit DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment specifically configured based on the above technical concept will be described below with reference to the drawings.

[0011] (Grain dryer) As shown in Fig. 1, the grain dryer 1 is configured with a storage chamber 2 and a drying section 3 arranged above and below, and is provided with an elevator 5 at the front of the machine for transferring grain from the drying section 3 to the storage chamber 2 to circulate and dry the grain. In addition, an operation panel P and a controller C for equipment control are provided at the front side of the drying section 3.

[0012] (Internal structure) 2, which shows the internal structure of the grain dryer 1 as viewed from the front, the drying section 3 comprises a hot air chamber 11, an exhaust air chamber 12, and a grain drying passage 13 sandwiched between the hot air chamber 11 and the exhaust air chamber 12. The hot air chamber 11 receives hot air from a burner (not shown) of the hot air supply section 6 arranged on the front side, and the exhaust air chamber 12 comprises a far-infrared radiator 23 as an auxiliary heat source, and is sucked and exhausted by an exhaust fan 40a of the suction and exhaust section 40 arranged on the rear side of the machine body. (Equipment transmission system) As shown in Figure 3, which is a perspective view of the transmission configuration of the internal equipment of the grain dryer 1, grain is transported to the elevator 5 by the lower conveying spiral gutter 18 of the drying section 3, and the grain is fed into the storage chamber 2 by the upper conveying spiral gutter 19. The grain is circulated at a constant speed by the rotary valve 14 of the drying section 3, and the grain is dried by hot air sucked in by the exhaust fan 40a on the back side of the drying section 3.

[0013] In order to maintain the above-mentioned circulation process, an opening / closing shutter 21 is provided at the bottom of the upper conveying spiral trough 19 in an electrically controllable manner so that the residual grain can be discharged into the storage chamber 2, and in order to remove dust from within the drying section 3, a cleaning window A is formed in the front wall 31 and an opening / closing lid 33b is provided in an electrically controllable manner.

[0014] (Open / close shutter) As shown in an enlarged side view of FIG. 4, the opening / closing shutter 21 of the transporting spiral gutter 19 is configured so that the bottom plate of the transporting spiral gutter 19 can be controlled to be opened and closed toward the storage chamber 2 by an arm 21b that is rotated by an electric drive unit 21a.

[0015] (cleaning window) In addition, on the front wall 31 of the drying section 3, as shown in Figures 5 to 7, which are an oblique view, a front view, and a side view of the main parts, respectively, a cleaning window A with an opening / closing lid 33b is provided, which is connected to a forward / backward rod 36b extending from a drive section 36a and can be electrically opened and closed by a manual switch 36c, in order to remove dust from the hot air chamber 11 and the exhaust chamber 12, and further a change-over switch 37 is provided to select either the opening / closing lid 33b or the opening / closing shutter 21.

[0016] As shown in Figure 8, which is an oblique view of the air flow lines inside the machine, when the opening / closing lid 33b is opened, the suction force of the exhaust fan 40a can exhaust accumulated dust T in the exhaust chamber 12 along the air flow line F from the cleaning window A to the suction and exhaust section 40.

[0017] The opening / closing shutter 21 and the opening / closing lid 33b are configured to be interlockingly controllable as described below in relation to the operation of the grain dryer 1. That is, the operation of the opening / closing shutter 21 and the opening / closing lid 33b is controlled according to each operating mode when loading grain, when drying with hot air, when drying with ventilation, and when discharging grain.

[0018] (Emissions Linked) Specifically, by opening the opening / closing lid 33b of the exhaust chamber 12 in conjunction with the discharge button S4 for grain discharge operation on the operation panel P, dust in the exhaust chamber 12 caused by the drying operation, particularly dirt accumulated in the exhaust duct of the external hot air type dryer, can be discharged, making it possible to clean the drying section each time a grain discharge operation is performed.

[0019] (Interlocked with ventilation drying) In addition, by closing the opening / closing lid 33b of the exhaust chamber 12 in conjunction with the ventilation button S2 for ventilation drying operation, it is possible to prevent a decrease in ventilation drying capacity, and by closing the opening / closing lid 33b of the exhaust chamber 12 in conjunction with the drying button S3 for hot air drying operation, it is possible to prevent a decrease in drying capacity.

[0020] (Selector switch) Next, for the removal of residual grain in the conveying spiral chute 19, by selecting the open / close shutter 21 with the change-over switch 37 as shown in the change-over switch connection diagram in Figure 9, it is possible to discharge the residual grain in the conveying spiral chute 19 instead of the dust from the drying section 3. Therefore, without the need to change the existing controller C, the above-mentioned linked control can be applied to both the discharge of dust from the drying section 3 and the discharge of residual grain in the conveying spiral chute 19 as necessary.

[0021] (Drive unit) In this case, by providing the change-over switch 37 integrally with the drive unit 36a to form a unit and relaying it between the controller C and the elevator harness, it becomes possible to handle it as an option for the automation unit, and it is also possible to configure the change-over switch 37 as a switch for switching on and off interlocking.

[0022] By using a wire connection instead of the advance / retract rod 36b for opening and closing the opening / closing lid 33b, it is possible to remove the opening / closing lid 33b and clean the inside of the machine without disassembling the connection between the opening / closing lid 33b and the drive unit 36a.

[0023] (Air hose) Next, as shown in FIG. 10, which is a perspective view of the cleaning window with the air hose arranged therein, an air hose 38 for air blow cleaning is arranged on the opening / closing lid 33b. When the cleaning mode is entered and cleaning is started, air is blown into the body of the machine in conjunction with the operation of the opening / closing lid 33b, thereby supplementing the wind force of the exhaust fan and improving cleaning performance.

[0024] Moreover, by blowing air from the air hose 38 in conjunction with the discharge operation by the discharge button S4, powerful cleaning can always be achieved.

[0025] In addition, by arranging the air hose 38 from the top downward inside the exhaust duct, when the cleaning mode is started and cleaning is started, the friction caused by the flow of the grain in the drying mesh section encourages dust to fall into the grain (synergistic effect), thereby air cleaning the exhaust duct.

[0026] (cleaning window / manual opening and closing configuration) Next, the cleaning window having a manual opening and closing structure will be described.

[0027] FIG. 11 is a front perspective view showing the structure of a drying section of a grain dryer, and FIG. 12 is a vertical sectional view showing the inside of the front side of the drying section.

[0028] The grain dryer has a storage section 2 that receives the loaded grains and a drying section 3 that dries the grains with hot air as they flow down from the storage section 2, arranged above and below.The lower part of the drying section 3 is a grain collection section 4 for returning the grains to the storage section 2, and an elevator 5 (see Figure 13) that runs from the grain collection section 4 through the front part of the body to the storage section 2.

[0029] The front wall 31 of the machine body is equipped with a hot air supply section 6 which is a burner case housing a burner 6a, and the rear wall 32 of the machine body is equipped with a suction and exhaust section 40 which discharges exhaust air in a divertable manner using an exhaust fan 40a, and is configured to be able to dry the grains while circulating them.

[0030] The drying section 3 is composed of a hot air chamber 11 with inlets W, W which receive hot air from the hot air supply section 6 on the front side, an exhaust air chamber 12 which is connected to the suction and exhaust section 40 on the rear side, and grain drying passages 13, 13 made of perforated plates which allow hot air to pass between the hot air chamber 11 and the exhaust air chamber 12 while guiding the grains received from the storage section 2, and these grain drying passages 13, 13 have a feed valve 14 at their lower end which feeds out a predetermined amount of grains flowing down the grain drying passages 13, 13 to the grain collection section 4.

[0031] The grain drying passages 13, 13 are arranged in the front-to-rear direction of the drying section 3, and are arranged in multiple rows in the left-to-right direction of the drying section 3. The lower ends of two adjacent grain drying passages 13, 13 are joined to form a flow passage. A forward and reverse rotating feed valve 14 is provided at the lower end to alternately feed a fixed amount of grains from the two grain drying passages 13, 13.

[0032] The insides of both grain drying passages 13, 13 are formed as exhaust air chambers 12, and the outsides of both grain drying passages 13, 13 are formed as hot air chambers 11, 11. Also, diamond-shaped perforated plate flow dividing sections 13a, 13a are provided at the inlet sides of both grain drying passages 13, 13, respectively, to receive a wide range of grains while ensuring a long drying path.

[0033] In order to achieve high speed drying by using exhaust air, exhaust air return passages 15, 15 are provided inside the hot air chambers 11, 11, which communicate from the suction and exhaust section 40 to the hot air supply section 6. In addition, a far-infrared radiator 23 is provided at the front end of the exhaust air chamber 12, which uses far-infrared rays to promote moisture transfer inside the grains and radiates far-infrared rays to the two grain drying passages 13, 13 facing both sides.

[0034] The front wall 31 of the machine body is configured so that a cleaning window A of the exhaust chamber 12 can be opened and closed at a position directly below the far-infrared radiator 23. In addition, the grain drying passages 13, 13 and the hot air chambers 11, 11 are also configured so that cleaning windows B, 11 can be opened and closed, and the rear wall 32 is also configured so that cleaning windows A, 11, 11 can be opened and closed in a similar manner.

[0035] The grain collecting section 4 is composed of left and right inclined plates 17, 17 for collecting the discharged grains below the discharge valve 14, and a lower transport spiral 18 for transporting the collected grains to the elevator 5.

[0036] (cleaning window) To explain the cleaning window A in detail, as shown in Figure 13, which is an oblique view of the area around the cleaning window (when closed) viewed diagonally from below, an opening / closing member 33 is provided on the window A, and a rod 34 for opening and closing operation extending below the hot air supply section 6 is connected to it.

[0037] As shown in Figure 14, which is an enlarged oblique view of the cleaning window portion (when open) viewed diagonally from below, the opening / closing member 33 has a slit plate 33a formed with a number of slits or punched holes through which outside air can flow, which is removably attached to the front wall 31 by fixing devices 33c such as wing nuts or fixing levers, and a blind plate 33b is supported on a shaft so that the slit plate 33a can be opened and closed. A rod 34 is connected to this blind plate 33b, and a rod holding member 35 is attached to the lower part of the hot air supply section 6, so that the blind plate 33b can be adjusted to be opened and closed.

[0038] The blind plate 33b can close the slit plate 33a by the suction force of the exhaust fan 40a, and is configured so that the blind plate 33b can be magnetically attracted as necessary.

[0039] As shown in Figure 15, which shows a side view (a) of the main part of the cleaning window portion (when closed) and a cross-sectional view (b) along line SS, the rod 34 has a grip 34a formed at its tip by bending or the like, and also has two bent portions P1 and P2 for positioning and holding the blind plate 33b.

[0040] In detail, when the rod 34 is pushed in to a position where the blind plate 33b closes the slit plate 33a, the grip 34a is positioned further back than the front end of the hot air supply section 6, and the front bent portion P1 is positioned and held by the rod holding member 35.

[0041] As shown in Figure 16, which shows a side view (a) of the essential parts of the cleaning window portion (when open) and its SS line cross-sectional view (b), when the rod 34 is pulled out and the blind plate 33b opens the slit plate 33a, the grip 34a is positioned forward of the front end of the hot air supply section 6, and the rear bent portion P2 is positioned so as to be held by the rod holding member 35.

[0042] In the grain dryer 1 having the above-described configuration, by opening the blind plate 33b by operating the rod 34 in the forward and backward directions, the suction force of the exhaust fan 40a allows outside air to flow directly into the exhaust chamber 12 through the slit plate 33a, thereby discharging dust in the exhaust chamber 12, including the accumulated dust directly below the far-infrared radiator 23.

[0043] Next, the internal cleaning of the exhaust chamber 12 will be explained. As shown in Figure 17, which is an enlarged oblique view of the cleaning window portion (fully open) viewed diagonally from below, by loosening the fasteners 33c of the slit plate 33a and removing the opening / closing member 33 integrally from the front wall 31, a cleaning tool can be inserted through the fully open cleaning window A to clean the exhaust chamber 12.

[0044] Similarly, for the grain drying passages 13, 13 and the hot air chambers 11, 11, by opening the cleaning windows B, C in the front wall 31 and the rear wall 32, respectively, dust can be cleaned from the drying section 3, and maintenance can be performed using cleaning tools from the front and rear sides.

[0045] As for the grain drying passages 13, 13, as shown in Figure 18, a perspective view with a perspective view of the main parts of the drying section 3, a part 41 of the drying net is made openable and closable and is configured to be held down by a fastener, making it possible to clean dust from inside the drying net, and by configuring the upper part of the net to be openable and closable with a hinge, it is possible to open and close the net without dropping the bolts or net into the machine.

[0046] Next, in the dryer cleaning mode, a mode is provided in which only the exhaust fan 40a operates, or only the exhaust fan 40a and the valve 14 operate, and further, the elevator 5 and the valve 14 can be configured to be switched on / off, thereby ensuring the safety of cleaning work on the drying net, etc., even when other grain circulation system equipment is stopped, such as when switching operating points.

[0047] In the above, the equipment in operation is displayed on a 7-segment display in response to switching of the operating area, and in cases where an LCD display is provided, the equipment in operation is displayed on the LCD, thereby ensuring safety when performing cleaning work on drying nets, etc.

[0048] Next, regarding the cleaning window opening / closing member 33, a movable slit plate is superimposed on a fixed slit plate so that the opening and closing of the slit portion can be electrically controlled, so that the slit portion can be opened upon switching to cleaning mode, and by switching to discharge operation after opening the slit portion, efficient cleaning can be achieved.

[0049] The opening / closing member that can be electrically controlled to open and close is provided at the cleaning port that opens into the front and rear of the exhaust duct in the center of the body, and an LED light is placed inside so that it can be turned on with a switch. Alternatively, the LED light is lit in conjunction with the opening / closing member when it is opened, and further, a control is provided to synchronously turn on the LED light when the cleaning mode is selected. By providing this control, efficient cleaning is possible by introducing outside air during exhaust operation, and the light is lit so that it is easy to check the inside.

[0050] In addition, during drying operation, if the exhaust air temperature does not rise to a predetermined reference temperature, an abnormality display is displayed to check whether the cleaning port is closed, thereby preventing the cleaning port from being forgotten to be closed during drying operation.

[0051] (Main points of the structure) The main points of the configuration of the grain dryer having the above-mentioned structure are summarized as follows.

[0052] An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the exhaust chamber 12 so as to be controllably opened and closed, and an opening / closing shutter 21 for opening the bottom of the upper conveying spiral gutter 19 to the storage chamber 2 is provided so as to be controllably opened and closed, and a collective opening / closing control is provided for opening and closing these opening / closing lid 33b and opening / closing shutter 21 together.Since this makes it possible to simultaneously remove dust from within the exhaust chamber 12 by opening the opening / closing lid 33b of the exhaust chamber 12, and to remove residual grains from the upper conveying spiral gutter 19 by opening the opening / closing shutter 21 of the upper conveying spiral gutter 19, the upper conveying spiral gutter 19 and the drying section 3 can be cleaned simultaneously as necessary.

[0053] An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the hot air chamber 11 so as to be controllably opened and closed, and an opening / closing shutter 21 for opening the bottom of the upper conveying spiral trough 19 to the storage chamber 2 is provided so as to be controllably opened and closed, and a collective opening / closing control is provided for opening and closing these opening / closing lid 33b and opening / closing shutter 21 together.Since this makes it possible to simultaneously remove dust from inside the hot air chamber 11 by opening the opening / closing lid 33b of the hot air chamber 11, and to remove residual grains in the upper conveying spiral trough 19 by opening the opening / closing shutter 21 of the upper conveying spiral trough 19, the upper conveying spiral trough 19 and the drying section 3 can be cleaned simultaneously as necessary.

[0054] An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the exhaust chamber 12 so as to be controllably opened and closed, and an opening / closing shutter 21 for opening the bottom of the upper conveying spiral gutter 19 to the storage chamber 2 is provided so as to be controllably opened and closed. A change-over switch 37 is provided for selecting either the opening / closing lid 33b or the opening / closing shutter 21, and an opening / closing operation switch 36c is provided for controlling the opening and closing of the side selected by the change-over switch 37.As a result, either the upper conveying spiral gutter 19 or the drying section 3 can be selected by the change-over switch 37, and only the one that is necessary can be cleaned by the opening / closing operation switch 36c.

[0055] There are provided a loading operation switch S1 which controls the storage of grain in the storage chamber 2, a ventilation operation switch S2 which controls ventilation drying by the ventilation operation of the drying section 3, a drying operation switch S3 which controls hot air drying by the hot air operation of the drying section 3, and a discharge operation switch S4 which controls the discharge of grain.In addition, a discharge linkage control is provided which opens and closes the opening and closing lid 33b and the opening and closing shutter 21 by this discharge linkage control, so that the opening and closing lid 33b and the opening and closing shutter 21 are opened and closed in conjunction with the discharge operation, making it possible to clean the upper conveying spiral gutter 19 and the drying section 3 in conjunction with the discharge operation.

[0056] The drying / ventilation linked control of the opening / closing lid 33b and the opening / closing shutter 21 controls the closure of the opening / closing lid 33b and the opening / closing shutter 21 in conjunction with the operation of the drying operation switch S3 or the ventilation operation switch S2, thereby preventing the opening / closing lid 33b and the opening / closing shutter 21 from being left open and enabling the drying operation or ventilation operation to be started.

[0057] A discharge operation switch S4 is provided to control the discharge of grains, and this discharge operation switch S4 controls the opening and closing of the side selected by the changeover switch 37. Therefore, in conjunction with the discharge operation switch S4, it is possible to clean only the upper conveying spiral gutter 19 or the drying section 3, whichever is necessary.

[0058] A nozzle for supplying air is provided in at least one of the exhaust air chamber 12 and the hot air chamber 11, and an exhaust-linked air control is provided to supply air by an exhaust switch. This exhaust-linked air control makes it possible to promote cleaning of the drying section 3 by supplying air to at least one of the exhaust air chamber 12 and the hot air chamber 11 during exhaust operation.

[0059] By providing a far-infrared radiator 23 on the front wall 31 side of the exhaust chamber 12 and providing a slit plate 33a and a blind plate 33b that can open and close the slit on the window A opening directly below it, when cleaning the drying section 3, by setting the blind plate 33b to the open position under operation of the exhaust fan 40a, outside air flows in directly through the slit plate 33a of the window A of the front wall 31 and passes directly below the far-infrared radiator 23, thereby preventing the accumulation of dust below the far-infrared radiator 23.

[0060] The slit plate 33a and the blind plate 33b are supported integrally on the front wall 31 in a detachable manner, so that the window A can be easily opened and restored when inspecting the inside of the air exhaust chamber 12.

[0061] A burner case 6 which protrudes above the window A of the front wall 31 and serves as a hot air supply section, and a rod 34 which extends in the front-to-rear direction below the burner case 6 and connects to a blind plate 33b are provided. By manipulating the rod 34 in the front-to-rear direction, the blind plate 33b is journalled to the slit plate 33a so that it can rotate back and forth, and the opening and closing of the window A in the front wall 31 can be easily adjusted by manipulating the rod 34 which extends in the front-to-rear direction below the burner case 6 back and forth.

[0062] The rod 34 has its middle portion supported on the bottom of the burner case 6 so that it can slide, and is inclined downward toward the front and has a grip 34a at its front end.This allows the blind plate 33b to be easily opened and closed using the grip 34a at the tip of the rod 34 while the middle portion is supported on the bottom of the burner case 6.

[0063] Grip 34a is configured to be located behind the front end of burner case 6 when blind plate 33b is in a position to close slit plate 33a, and to be located forward of the front end of burner case 6 when blind plate 33b is in a position to open slit plate 33a. This means that the position of grip 34a of rod 34 corresponds to the opening and closing of blind plate 33b, and in particular, if blind plate 33b is left unfastened, grip 34a will pop out from the front end of burner case 6, making it easy to recognize the state of blind plate 33b, which is difficult to see.

[0064] A driving means is provided for driving the blind plate 33b to open and close, and the opening operation of the blind plate 33b is controlled in conjunction with the grain discharge operation after the grain drying operation, so that the blind plate 33b opens each time a grain discharge operation is performed, and dust that has accumulated below the far-infrared radiator 23 during the drying operation can be discharged prior to the next drying operation. [Explanation of symbols]

[0065] 1 Grain dryer 2 Storage chamber 3 Drying section 11 Hot air room 12 Ventilation chamber 19 Upper conveyor spiral trough 21 Open / close shutter 31 Front wall 33b Opening / closing lid 36c Opening and closing switch 37 Changeover switch 41 Part of the drying net S1 Loading operation switch S2 Ventilation operation switch S3 Drying operation switch S4 Discharge operation switch A Cleaning window (ventilation room) B Cleaning window (grain drying passage) C Cleaning window (hot air room)

Claims

1. The storage section (2) for storing grain and the drying section (3) are configured above and below, A hot air supply section (6) is provided at the front of the machine body, and a suction and exhaust section (40) is provided at the rear of the machine body, The drying section (3) is provided with a hot air chamber (11) which receives hot air from the hot air supply section (6), an exhaust air chamber (12) through which exhaust air sucked in by the suction / exhaust section (40) passes, and a grain drying passage (13) which is located between the hot air chamber (11) and the exhaust air chamber (12) and which guides the grain received from the storage section (2), The grain drying passage (13) is composed of an inner drying net and an outer drying net extending in the front-rear direction of the drying section (3), and the outer drying net is inclined toward the inside of the left and right sides of the machine body, A grain dryer characterized in that an opening / closing member (41) is provided in a part of the outer drying net on the rear side near the suction exhaust section (40) in the front-rear direction of the grain drying passage (13).

2. 2. The grain dryer according to claim 1, wherein an opening and closing window is provided at the front of the body of the hot air chamber (11) or the exhaust chamber (12) to allow outside air to be sucked in by the action of the suction and exhaust section (40).

3. 3. A grain dryer as described in claim 1 or claim 2, characterized in that the front and rear ends of the grain drying passage (13) face the front wall (31) and the rear wall (32) of the body, respectively, and an inspection window (B) is provided in the front wall (31) or the rear wall (32).

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