JPS62178880A - Cereal grain drying control system of 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 method for a grain dryer.

Conventional technology Conventionally, grains are allowed to flow down inside a drying chamber, and while the grains are exposed to hot air generated by a burner to dry them, a moisture sensor detects the moisture content of the grains during this circulation drying process. to detect the drying speed of this grain, and if the detected drying speed detected by this moisture sensor is outside the set drying speed range, the temperature of the hot air generated from the burner is controlled to immediately lower or increase the detected drying speed. The method was to control the drying speed so that it was the same as the set drying speed.

Problems to be Solved by the Invention While the grains housed in the dryer are repeatedly circulated in the drying chamber and flowed down, the grains in the flow are exposed to the hot air generated by the burner and dried. The drying speed of the grains is detected by detecting the moisture value of the grains during this circulation drying, and when the detected drying speed detected by this moisture sensor is greater than the set drying speed range, the temperature of the hot air generated from the burner is adjusted. In a grain drying control type dryer, the temperature of the hot air generated from the burner is controlled to be immediately lowered, and when the detected drying speed is lower than the set drying speed range, the temperature of the hot air generated from the burner is controlled to be immediately increased. When the variation in values is large, the detected drying speed detected by the moisture sensor often detects a value smaller than the set drying speed range, and this detection immediately increases the temperature of the hot air generated from the burner. Controlling it in such a way will result in an immediate change in control to the side where grains are more likely to develop on the body side, or to the risky side where the taste of the grains deteriorates. In addition, the taste of the grains sometimes deteriorated.

Means for Solving the Problems This invention comprises a drying chamber (2) in which grains are dried by hot air from a burner (1) while flowing down;
In a grain dryer having a moisture sensor (3) that detects the moisture value of the grains that are circulated and dried to determine the drying speed of the grains, the moisture sensor (3) detects the moisture value of the grains. When the drying speed is higher than the set drying speed range, the hot air temperature from the burner (1) is controlled to be immediately lowered, and when the detected drying speed is lower than the set drying speed range, the same drying speed is detected multiple times. The grain drying control system of the grain dryer is characterized in that it is equipped with a temperature control device that controls the temperature of the hot air from the burner (1) to be increased.

Effect of the Invention While repeating the circulation of the grains housed in the dryer flowing down inside the drying chamber (2), the moisture sensor In (3), detect the moisture value of the grain during this circulation drying,
The drying speed of this grain is calculated by this detection, and this detected drying speed is compared with the set drying speed that has been set and stored. When the detected drying speed is larger than the set drying speed range,
The temperature of the hot air generated from the burner (1) is controlled to be immediately lowered, and the temperature of the hot air generated from the burner (1) is changed to a low temperature to dry the grains.

Contrary to the above, when the detected drying speed is smaller than the set drying speed range, if similarly small drying speeds are detected multiple times, the temperature of the hot air generated from the burner (1) is controlled to be increased. The temperature of the hot air generated from this burner (1) is changed to a high temperature to dry the grains.

Effects of the Invention According to this invention, when the detected drying speed of grains detected by the moisture sensor (3) is not within the set drying speed range but is greater than the set drying speed range, the temperature of the hot air generated from the burner (1) is immediately reduced. The temperature of the hot air generated from this burner (1) is changed to a low temperature to dry the grains.Contrary to the above, when the drying speed is lower than the set drying speed range, the same small drying speed is applied multiple times. When the drying speed is detected, the temperature of the hot air generated from the burner (1) is controlled to be increased, and the temperature of the hot air generated from the burner (1) is controlled to be changed to a high temperature to dry the grains. Control of changing to the side is stable control, and therefore, the kernels during drying do not develop a shell side, and the taste does not deteriorate.

Embodiment In the illustrated example, the wall (5) of the dryer (4) is rectangular in plan view and consists of front and rear wall plates and left and right wall plates. This configuration is equipped with an operating device (6) for controlling operations such as stopping and stopping.

A grain collecting trough (7) with a built-in transfer spiral is provided between the center of the lower part of the machine wall (5) and extending in the front and back direction. Chambers (2), (2) are provided and communicated with each other, and in the lower part of the drying chambers (2), (2), feeding valves (8), (8) for feeding out and flowing down the grains are rotatably supported, Inside this drying chamber (2), there is a hot air chamber (
9) and the burner case (1) provided on the front wall plate portion.
The hot air chamber (9) is connected to the burner (1) built in the hot air chamber (9).
) is provided with a temperature sensor (11) for detecting the hot air temperature in the hot air chamber (9), and the drying chamber (2)
, (2) a ventilation chamber (12) between the outside and the left and right wall plates;
(12) and an exhaust fan (13) provided on the rear wall plate.
), and a motor (1) is installed at the bottom of the rear wall plate.
4), and this motor (14) rotationally drives the transfer spiral, the outlet valves (8), (8), the exhaust fan (13), etc. in the grain collection gutter (7). .

A fuel pump (1
5), and the fuel tank (15) is connected to the fuel tank (15) by this fuel pump (15).
The fuel in B) is sucked in through the fuel hose, and the fuel pump (15) supplies the fuel into the burner (1) through the fuel supply pipe, and the blower is installed on the outside of the upper plate of the burner case (10). (17) is rotated by a blower motor (18) to blow combustion air into the burner (1) through a blower duct.

A storage chamber (19) is formed above the drying chambers (2), (2), and a ceiling plate (20), (
20) and a transfer gutter (21) incorporating a transfer spiral,
The central part of this transfer gutter (21) stores the transferred grains in this storage chamber (
18) Provide a supply port for feeding into the storage chamber (18), provide a diffusion plate (22) below this supply port, and use this diffusion plate (22) to uniformly diffuse and return the grains into the storage chamber (18). It is the composition.

A grain hoist (23) is 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 a packet conveyor (24) belt is installed between the upper end and the starting end of the transfer gutter (21). A discharging pipe (25) is provided to communicate with the lower end and the grain collection gutter (7).
) A supply gutter (26) is provided between the end portion and the end portion for communication.
A motor (27) is provided on the upper side of the grain hoist (23),
This motor (27) drives the packet conveyor (24) belt, the transfer spiral in the transfer gutter (21) and the spreader plate (
22) etc. is configured to rotate.

A moisture sensor (3) is provided on the side of the grain raising machine (23), and this moisture sensor (3) is connected to the packet conveyor (23).
4) receives the grains that fall while being conveyed to the upper part, and supplies them to the moisture sensor (3), which crushes the supplied grains under pressure.At the same time, it detects the moisture value of the crushed grains, and The drying rate of the grain is calculated, for example, every hour based on the detected moisture value, and the moisture sensor (3)
The moisture dispenser motor (28) in this moisture sensor (3) is rotated by the electric measurement signal transmitted from the operating device (6) at predetermined time intervals, and the rotation of this motor (28) causes this moisture to be removed. Each part of the sensor (3) operates to detect the moisture value of the grain.

The operating device (6) is box-shaped, and the surface plate of the box includes a start switch (29) for starting and stopping the dryer (4), a stop switch (30), and grain finishing. Target moisture setting tool (31) for setting target moisture value,
The hot air temperature setting hole (32) for setting the hot air temperature and the detected moisture value detected by the moisture sensor (3) and the burner (
1) A display window that alternately displays the temperature of the hot air generated from the
33), and a control device (34) inside.
and a temperature control device (35), and the control device (34) is an input circuit into which the operations of the switches (28), (30) and the parts (31), (32) are input. (36), the detection value detected by the moisture sensor (3) is A
- an A-D converter (37) for converting
3B), the temperature control device (35) includes an A-D converter (39) that converts the detected value detected by the temperature sensor (11) from A to D; The input circuit (40) into which the converted value is input, the control device (34) and the temperature control device (35) are 2, and various input values are input from the input circuits (36), (38), (40). A CPU (4
1) The configuration includes an output circuit (42) that receives various commands from the CPU (41) and outputs them.
The control device (34) and the temperature control device (35) control starting and stopping of each of the motors (10, (1B), (27), (28), etc.), and the fuel pump (15).
This configuration controls the start and stop of the fuel pump (15) and changes the amount of fuel sucked in by the fuel pump (15).

The control device (34) starts the dryer (4) when the moisture sensor (3) detects a grain moisture value that is the same as the finished target moisture value set by operating the target moisture setting knob (31). It is configured to automatically stop, and a timer installed in the operating device (6) compares this detected moisture value with a detected moisture value detected after a predetermined period of time has elapsed, for example, one hour, and the drying of the grain is performed. This detected drying speed is compared with a set drying speed set and stored in the control device (34), and when the detected drying speed is larger than the set drying speed range, the burner (1) The temperature of the hot air generated from the fuel pump (15) is controlled by the temperature control device (35).
The control device (30) controls to reduce the number of opening and closing of the fuel valve of the fuel pump (15) by a predetermined number of times set and stored in the control device (30) to reduce the amount of fuel sucked by the fuel pump (15). (1) This is a configuration in which the temperature of the hot air generated is controlled to be changed to a lower temperature.

In addition, the above does not mean that when the detected drying speed is smaller than the set drying speed range, when the detected drying speed is the same small detected drying speed multiple times, the temperature of the hot air generated from the burner (1) is controlled by the temperature control device. In (35), the fuel pump (15) is controlled to increase the number of times the fuel valve of the fuel pump is opened and closed by a predetermined number of times set and stored in the control device (34). The temperature of the hot air generated from the burner (1) is changed to a high temperature by increasing the amount of fuel sucked into the fuel pump. The configuration is such that the amount of increase or decrease in the number of times the valve opens and closes is different.

The temperature control device (35) is connected to the hot air temperature setting hole (3
The temperature sensor (11) detects the hot air temperature in the hot air chamber (9) so that the hot air temperature reaches the set hot air temperature set by operating 2), and compares the detected hot air temperature with the set hot air temperature to determine if there is a difference. If the drying speed of the grain is detected by the moisture sensor (3), the moisture value of the grain is detected and the drying speed of the grain is adjusted. The detected drying speed is compared with the detected hot air temperature detected by this temperature sensor (11). The detected moisture value detected by this moisture sensor (3) is alternately displayed in the display window (
This is the configuration displayed in 33).

Note that when the detected drying speed is smaller than the set drying speed range and the next detected drying speed is larger than the set drying speed range, the temperature of the hot air generated from the burner (1) is immediately controlled to be lowered, and the burner ( 1) The temperature of the generated hot air may be controlled to be changed to a lower temperature.

By operating each machine (31) and (32) of the operating device (6) and operating the start switch (28), the dryer (4) starts and at the same time hot air is generated from the burner (1). This hot air is sucked and exhausted by the exhaust fan (13), thereby ventilating the drying room (2) from the hot air room (9), and the grains stored in the dryer (4) are transferred to the storage room (18). ) is exposed to this hot air and dried while flowing down in the drying chamber (2), is delivered to the lower part by the delivery valve (8) and flows down, and is passed through the grain collecting trough (7) by the lower transfer spiral. The packets are transferred and discharged into the supply gutter (28), discharged to the upper part by the packet conveyor (24) and supplied into the transfer gutter (21), and diffused through the transfer gutter (21) by the upper transfer spiral (22). ), is evenly diffused and returned into the storage chamber (18) by this diffusion plate (22), and is circulated and dried to have the same final target moisture value as set in the target moisture setting hole (31). When the moisture sensor (3) detects the grain moisture value, the dryer (4) is automatically stopped under automatic control by the control device (34) and temperature control device (35) of the operating device (6).

During this drying work, the drying speed of the grain is calculated based on the grain moisture value detected by the moisture sensor (3), and this detected drying speed and the settings set and stored in the control device (34) are calculated. When the detected drying speed is higher than the set drying speed range, the temperature control device (35) decreases the number of times the fuel valve of the fuel pump (15) is opened and closed, and the burner (1) The temperature of the generated hot air is immediately changed to a low temperature to dry the grains.

Contrary to the above, when the detected drying speed is smaller than the set drying speed range, if this small detected drying speed is calculated multiple times, the temperature of the hot air generated from the burner (1) is changed to a high temperature and the grain is Dry the grains.

When the detected drying speed of grains is smaller than the set drying speed range, the temperature of the hot air generated from the burner (1) cannot be changed to a higher temperature unless this small detected drying speed is detected multiple times. , stable grain drying can be obtained at all times.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is a partially sectional front view of the dryer, and Fig. 4 is a partially sectional view. A side view of the dryer, FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (1) indicates a burner, (2) indicates a drying chamber, and (3) indicates a moisture sensor.

Claims (1)

[Claims] There is a drying chamber (2) in which the grains are dried by hot air from a burner (1) while flowing down, and the moisture value of the grains that are circulated to this drying chamber (2) and dried is detected to dry the grains. In a grain dryer having a moisture sensor (3) that detects the speed, when the drying speed detected by the moisture sensor (3) is greater than the set drying speed range, the burner (
1), and when the detected drying speed is lower than the set drying speed range, control is performed to increase the hot air temperature from the burner (1) by detecting the same drying speed multiple times. A grain drying control system for a grain dryer, which is characterized by being equipped with a temperature control device.