JPS61213483A - Cereal grain drying controller for cereal grain drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain drying control device for a grain dryer.

Conventional technology In the past, the temperature of the hot air generated by the burner was set to a constant value depending on the type of grains to be dried and the amount stored in the dryer, and the amount of suction air drawn by the exhaust fan was also kept constant while drying. , a device that uses a moisture detection sensor to detect moisture in grains.

Problems to be Solved by the Invention While the grains housed in the dryer are flowing down inside the drying chamber,
The hot air generated by the burner is passed from the hot air chamber to the drying chamber, passes through the exhaust chamber, and is sucked and exhausted by an exhaust fan.The grains flowing down the drying chamber are exposed to this hot air and dried, while moisture is removed. The dryer uses a detection sensor to detect the moisture content of the grains, and automatically stops when the grains reach a specified moisture content.
During this drying process, the temperature of the hot air generated by the burner and the suction air sucked by the exhaust fan are not controlled depending on the drying speed of the grains, so the moisture content of the grains decreases. If the rate varies, for example, if the moisture loss rate becomes 1% or more per hour, the drying grains may split.

Means for Solving the Problems This invention utilizes hot air generated from the eighth (1) in a hot air chamber (
2) to the drying room (3), passes through the ventilation chamber (4), and is sucked and discharged by the exhaust fan (5), and an exhaust air temperature detection sensor (6) is installed to detect the temperature of this exhaust air. A moisture detection sensor (7) is installed in the ventilation chamber (4) and detects the moisture content of the grains dried by the hot air generated from the burner (1) to detect the drying speed. 6), (
7) The temperature of the hot air generated from the burner (1) is adjusted so that the value detected by the burner (1) is below the set value that is preset and stored in the operating device (11) that starts, stops, or controls the dryer. The operating device (5) controls the control device to lower the amount of air or reduce the amount of suction air sucked and discharged by the air exhaust fan (5).
11) The structure of the grain drying control device of the grain dryer provided in the

Functions and effects of the invention The grains flowing down in the drying chamber (3) are heated by the hot air generated from the burner (1), which passes through the hot air chamber (2), the drying chamber (3), and the exhaust chamber (4). The grains are sucked and exhausted by the exhaust air 41 (5) and are dried by being exposed to this hot air. 7), and the exhaust air 41! The temperature of this exhaust air that is sucked and exhausted by (5) is measured by the exhaust air temperature detection sensor (6
), and the burner ( 1) The control device controls to lower the temperature of the hot air generated, or to reduce the amount of suction air sucked and discharged by the exhaust fan (5).

Conventionally, during drying work, the temperature of the hot air generated from the burner (1) and the suction air force sucked and discharged by the exhaust air 41 (5) were constant, but according to the present invention, the operating device i! t(11)
so that it is less than the set value that has been set and stored in advance.
Based on the exhaust air temperature detected by the exhaust air temperature detection sensor (6) and the drying rate detected by the moisture detection sensor (7),
The control device performs control to either lower the temperature of the hot air generated from the nozzle (1) or reduce the amount of suction air sucked by the exhaust fan (5), so that the grains being dried are The grains are never split.

Embodiment In the illustrated example, the model (9) of the dryer (8) has a rectangular shape when viewed from the front and back, and is made up of front and rear wall panels and left and right wall panels. (lo),
(10), and a moisture detection sensor (7) is provided on the front wall plate.
) and an operating device (11) are detachably attached.

, 1* Lower transfer gutter (12) located in the center of the lower part of the machine wall (9) and having a U-shape in front view and equipped with a helix extending in the front and rear directions.
A grain collection chamber (13) having a V-shape in front view is provided above the lower transfer gutter (12) and communicated with the grain collection chamber (13).
At the top, drying chambers (3), (3) are vertically formed and communicated between the left and right ventilation mesh plates, and at the bottom of the drying chambers (3), (3), there are rotatable delivery valves (14), (14) is provided.

An inclined plate is provided on each of the ventilation mesh panels, a partition plate is provided at the bottom, a hot air chamber (2) is formed between the inner ventilation mesh panels, and a burner case (2) is provided on the slope of the curved front wall. 15) and communicates with the eighth (1) built into the interior. Air exhaust chambers (4), (4) are formed between the outer ventilation net plate and the left and right wall plates, and are communicated with an air exhaust fan (5) provided on the rear wall plate. (4) An exhaust air temperature detection sensor (6) for detecting the exhaust air temperature is installed in the rear part, and an exhaust fan motor (1B) is installed in the lower part of the rear wall plate. motor(
16) rotates the exhaust fan (5), the delivery valve (14), and the spiral inside the lower transfer gutter (12). (1) A fuel pump (17) that supplies fuel for combustion into the burner (1) and a blower (17) that blows combustion air into the burner (1).
18) and a blower motor (18).

A storage chamber (20) is formed above the drying chamber (3), (3), and the ceiling plate (lO) above the storage chamber (20);
Upper transfer gutter (21) with spiral inside along (10)
A supply port for supplying the transferred grains into the storage chamber (20) is provided in the center of the upper transfer gutter (21), and a diffusion plate (22) is provided at the bottom of the supply port to allow the diffusion Board (2
2) is configured to uniformly diffuse and return grains into the storage chamber (20).

Grain raising 411 (23) is removably attached to the front part of the front wall plate, and a packet conveyor (24) belt is stretched between the upper and lower pulleys inside, and the upper end and the upper transfer gutter (21)
A dispensing tube (25) is provided between the starting end and the lower transfer gutter (12) for communication, and a supply gutter (26) is provided between the lower end and the terminal end of the lower transfer gutter (12) for communication. A grain hoist motor (27) is installed on the upper side of the machine (23), and this grain hoist motor (27) rotates the packet conveyor (belt 20) and the helix in the upper transfer gutter (21). This is a driving configuration.

The moisture detection sensor (7) has a box shape, and a detection part for detecting moisture in grains protrudes from the inside of the box.
9) The structure is such that the grains flowing down the inside are crushed under pressure, and at the same time, the moisture content of the crushed grains is detected to calculate the moisture drying loss of the grains per hour to detect the drying rate of the grains.

The operating device (11) is box-shaped, and has a start switch (2B), a stop switch (29), a target moisture setting hole (30), a hot air temperature setting hole (31), etc. on the surface, and has internal parts. The control device i! ! (32), and the control device (32) includes the start switch (2B), the stop switch (29), and the rJ standard sample setting spreader (30).
and an input circuit (33) into which the operation of hot air temperature setting/spreading (31) is input, and the detection value detected by the exhaust air temperature detection sensor (6) and the detection value detected by the moisture detection sensor (7) are A. - An A-D converter (34) that performs D conversion, an input circuit (33) into which the converted value converted by this A-D converter (30) is input, these input circuits (33), (33
) and an amplifier (3B) that amplifies the various commands issued by the CPU (35). (32) in the fuel pump (
17), the blower motor (19), the grain hoist motor (27), the exhaust fan motor (1B), etc. are configured to be controlled such as starting and stopping.

The CPU (35) compares the set value set in the target moisture setting mode (30) with the detected value detected by the moisture detection sensor (7), and sets the moisture value of the grains that is the same as the set value to the moisture content. The dryer (8) is automatically stopped when detected by the moisture detection sensor (7), and the drying speed of the grains detected by the moisture detection sensor (7) is controlled by the CPU (35).
) so that the combustion fuel supplied to the burner (1) by the fuel pump (17) is reduced by a command from the CPU (35) so that the drying speed is always slower than the predetermined drying speed stored in the burner (1). The temperature of the hot air generated from the burner (1) is controlled to be lower than the predetermined drying speed that has been stored, and the exhaust air temperature detection sensor (6) detects the temperature of the hot air. The exhaust air temperature is the CPU (35)
The exhaust fan (5) is operated by a command from the CPU (35) so that the exhaust air temperature is always lower than a predetermined temperature stored in the CPU (35).
The exhaust fan (
5) The rotational speed is controlled to be reduced so that the temperature of the exhaust air is lower than a predetermined memorized temperature. When starting drying work, the hot air temperature is controlled by the hot air temperature set by the hot air temperature setting arc (31), but the moisture detection sensor (7)
When the drying speed starts to be detected, the hot air temperature is automatically controlled as described above.

By operating the operating device (11), hot air generated from the burner (1) provided on the front wall plate is sucked and exhausted by the exhaust fan (5) provided on the rear wall plate, and the hot air chamber (2) The drying chamber (3) is ventilated, and the grains stored in the model (9) of the dryer (8) are exposed to this hot air and dried while flowing through the drying chamber (3). It is fed out to the lower part by the valve (14), transferred and discharged into the supply gutter (2B) by the spiral and lower transfer gutter (12), and transported to the L section by the first grain machine (23).
It is transferred and supplied onto a diffusion plate (22) by the spiral and the upper transfer gutter (21), and is evenly diffused and returned into the storage chamber (20) by this diffusion plate (22), and is circulated and dried. 1
When the moisture detection sensor (7) detects moisture 4di that is the same as the set value set in the 1-1 sample setting inquiry (30) in 1), the operating device (11) automatically controls the drying mc8).
During this drying operation, the moisture detection sensor (7) detects the drying speed of the grains, and the detected drying speed is set to a predetermined value stored in the control device (32). The control device (32) controls the fuel pump (17) to reduce the combustion fuel supplied into the burner (1) so that the temperature of the hot air generated from the burner (1) is lower than the drying rate. At the same time, the temperature of the exhaust air passing through the exhaust chamber (4) is measured by the exhaust air condition detection sensor ( 7) is detected, and this detected value is the control device!
(32) The amount of suction air sucked and discharged by the exhaust fan (5) is controlled to be small so that the exhaust air temperature is always lower than the predetermined exhaust air temperature stored in the memory. The grains are dried under controlled conditions.

That 41g! (9) The drying speed and exhaust air temperature of the grains housed and dried in the interior are always controlled below a predetermined level to dry the grains, so the grains do not fall to the shell side.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a side view, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a part of it. It is an enlarged front view. In the figure, (1) is a burner, (2) is a hot air chamber, (3) is a drying chamber, (4) is an exhaust chamber, (5) is an exhaust fan, (6) is an exhaust air condition detection sensor, ( 7) is a moisture detection sensor, (11
) indicates the operating device.

Claims (1)

[Claims] The hot air generated from the burner (1) is ventilated from the hot air chamber (2) to the drying chamber (3), passes through the exhaust chamber (4), and is sucked and exhausted by the exhaust fan (5). A detecting exhaust air temperature detection sensor (6) is provided in the exhaust chamber (4), and
A moisture detection sensor (7) that detects the drying speed by detecting the moisture in the grains dried by the hot air generated from the burner (1).
are provided, and the detection values detected by each of these detection sensors (6) and (7) are below the set value preset and stored in the operating device (11) that starts, stops, controls, etc. the dryer. In order to reduce the temperature of the hot air generated by the burner (1), or reduce the amount of suction air sucked and discharged by the exhaust fan (5), a control device is provided in the operating device (11). A grain drying control device for a grain dryer.