JPS5828971A - Automatic controller for cereal 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] The present invention relates to an automatic control device for a grain dryer.

Mechanical drying of grains can improve the drying efficiency by setting certain conditions, but if the temperature and air volume of the hot air are not properly adjusted, damaged grains such as split grains and heat-damaged grains may occur. In addition, the taste deteriorates, which has a great impact on quality.

Conventionally, there is a method of continuously controlling the temperature and air volume of the hot air based on the grain moisture value measured by an automatic moisture meter installed in a grain dryer. Moisture measurements may vary by 2-2 due to changes in grain density, grain density, etc.
Continuously automatically controlling the temperature and air volume of the hot air in the 16% to 21-area with grain moisture, which is extremely heat sensitive, using a moisture needle, would be dangerous and cause accidents. There is a risk.

In order to solve the above-mentioned problems, the present invention provides a circulation type grain dryer with a moisture measuring device in the grain circulation process.
In addition, the fire heat generating device is provided with a temperature control section, and the ventilation device is provided with an electric motor having a speed change section, and the grain amount detection section is connected to the moisture measuring device through the control device to the temperature control section and the front ventilation device. The raw material grains (11 rice) were fed to the dryer by being electrically connected to the transmission section of the dryer.
Accurately determine the initial moisture value and the amount of grain and input them into the control device, and then set the initial hot air for drying the grains (high moisture content) to an arbitrary predetermined temperature (around 60°C) and large wind *
('Id/sec, or more), and the subsequent flow rate of the hot air is decreased stepwise or gradually by a signal from a timer provided in the control device. The drying effect of the highly sensitive grain moisture zone 16-21 is determined by the standard drying loss rate (0.8-1.011/hour)K.
IIc The objective is to develop and provide an automated device that automatically adjusts to completely prevent the occurrence of damaged grains such as split grains, and efficiently mass-produces high-quality dried grains without damaged grains at all times. .

The present invention will be explained with reference to embodiment figures. The symbol (1) in the figure is the drying section body, and inside the body (1) there are a hot air chamber (grain drying chamber (8)) and an exhaust chamber (4) in parallel, as well as a fire heat generating device on the wall. (5) 1 ventilation device (6) is installed respectively, and a grain tank (8) with a grain amount detection part ff) is mounted on the upper part of the machine body (1), and 1 - of the machine body (1).
This is a grain dryer with an elevator (9) installed on the side to integrally form a grain circulation process (lO). Then, a moisture measuring device (11) is installed on the wall of the grain tank (8) of the grain calculus step (10), and the rc temperature control unit (12) is installed on the wall of the grain tank (8).
) is installed, and a transmission section (18) is installed in the ventilation device (6).
) is provided, and the grain amount detection section (η) and the moisture measuring device (11) are connected to the front temperature control section (12) and the ventilation device (6) via a control device (15). It is connected to the variable part (18) in a relational manner.

Next, the control device (16) will be explained with reference to FIG. Moisture sensor of the moisture measuring device (11)! - (16) and each output collapse analog selection circuit (17) of the grain amount detection section (7)
, the VD converter (18) is connected to the CPU (l series circuit), and the output side of the CPU (19) circuit is connected to the transmission section (13) of the electric motor (14) provided in the ventilation device (6).
It is connected to. Therefore, the moisture measuring device (11)
The detection signals from the moisture sensor (16) and the grain detection section (7) are respectively input to the analog selection circuit (17), and are selected by a command signal from the CPU (19) side and sent to the moisture sensor (16). ) are sequentially converted into digital values by a K4/D converter (18) and stored in a storage device of an appropriate CPU (19). Then, the grain (
The initial hot air temperature f around 50℃ (high moisture content) (for example, 55
℃) and air volume (7 m'/eec-t), and calculate the standard drying loss rate (for example, 0.9 Calculate the air volume for each hour (1 hour, 2 hours, etc.) until the desired finished sand moisture value (for example, 14.61G) is reached while performing the drying action (7 o'clock). The data is stored in the CPU's storage device. Then, the nine digital values calculated for each time are converted into output signals by another command, and are converted into output signals by the speed change section (18) of the ventilation device (6).
), and each time the electric motor (14) is rotated at an appropriate deceleration speed, the air volume is gradually reduced. Note that the drying air volume is 5 wl/sec at a moisture content of 21-
In some cases, the drying temperature is reduced stepwise, such as 8 #// sec at a moisture content of 16 Is, or the drying temperature is appropriately reduced in parallel with the air volume adjustment. Further, just before the end of drying, the finished moisture value is checked using the moisture measuring device.

In this way, when the grain dryer automatic control device of the present invention finishes loading the grain into the dryer, the moisture sensor and the grain amount detection section of the moisture measuring device measure the moisture content of the grains. The amount of grain is measured and the initial hot air temperature and air volume are set to high temperature and large air volume, and during drying work, the air volume is adjusted in stages according to the signal from the clock set in the control device. ,
or gradually decreases, resulting in extremely high drying efficiency.
In addition, it is possible to reliably, smoothly and quickly mass-produce high-quality dried grains without split grains, heat-damaged grains, germination-impaired grains, etc.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a sectional view of this device, and FIG. 2 is an electric circuit diagram of its control device. 1...Drying section body 2...Hot air chamber 8...Grain drying room 4...Exhaust air chamber 5...Fire heat generating device 6...Ventilator 7...Grain amount detection section 8
...Grain tank 9...Elevator 1G-...Grain circulation stroke 11...Moisture measuring device 12...Temperature adjustment section 13...Transmission section 14...Electric motor 15...Control device 16. ...Moisture sensor 17...Analog selection circuit 18...A/D converter 19...CPU 1st 4Al 20th

Claims (1)

[Claims] In a drying device in which a grain drying room, a hot air room, and an exhaust room are installed in parallel, and a grain tank with a grain amount detection unit is mounted on a transfer section body equipped with a heat generating device and a ventilation device to form a grain circulation process. , a moisture measuring device is provided in the grain circulation process, a temperature control section is provided in the fire heat generating device, and an electric motor with a variable speed section is provided in the ventilation device, and the grain amount detecting section and the moisture measuring device are controlled. The temperature control section and the speed change section of the ventilation device are electrically connected through a device, and the speed change section of the ventilation device is actuated by a signal from a timer such as a timer provided in the control device. An automatic control device for a grain dryer that reduces the amount of drying hot air in stages and gradually decreases the amount of drying air.