JPS5826983A - 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 increase the drying efficiency by setting certain conditions, but if you neglect to properly adjust the temperature of the hot air, damaged grains such as split grains and heat-damaged grains will occur, resulting in drying in 9 seconds. In addition, the quality of the paper has been greatly affected by the reduction in taste.

Conventionally, the hot air temperature is continuously controlled by the moisture value measured by a 90 dynamic moisture meter installed in a grain dryer. This can cause an error of 2- to 8-11 degrees in the moisture measurement value due to changes in grain moisture, which is particularly heat-sensitive.
~21- Continuous automatic control of the hot air temperature at the end of the area using a moisture meter may be dangerous and cause an accident.

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, a hot air temperature control section in the hot air generator, and a grain dryer installed in the grain tank. By electrically connecting the amount detection unit and the moisture measuring device to the hot air temperature adjustment unit via a control device, the amount of raw grain (I) supplied to the dryer is
The initial moisture value of the grain (t rice) and its grain amount are each accurately measured and input into a control device, and the control device arbitrarily sets the initial hot air temperature for the grain (high moisture II) based on each of the measured values. When setting the temperature to a high temperature (60℃ or higher),
The temperature of the hot air thereafter is set in the control device so that the temperature decreases stepwise by 1 or gradually in accordance with the signal from the clock.
Therefore, the above-mentioned highly heat-sensitive moisture 16-~2121
The drying effect of
Automated equipment that automatically adjusts the appropriate temperature (45℃ to 55℃) 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. We aim to develop and provide this service.

The code (1) in Figure 0 to explain the present invention with reference to the drawings indicates a hot air chamber (2), a grain drying chamber (8), and a ventilation chamber (4).
It is a drying section machine in which a hot air generator (7) consisting of a fire heat generator (5) and an air exhaust fan (6) is installed on the wall. This is a grain dryer that is equipped with a grain tank (9) and has an elevator (lO) erected on the - side of the body (1) to integrally form a grain circulation path (11).

A moisture measuring device (12) is provided on the wall of the grain tank (9) in the grain circulation process (11), and a hot air temperature control section (13) is provided in the hot air generator (7) to detect the amount of grain. The section (8) and the moisture measuring device (12) are connected to a control device (14).
) is associated and electrically connected to the hot air temperature control unit (18).

Next, the control device (14) will be explained with reference to FIG. Each output side of the moisture sensor (15) and grain amount detection section (8) of the moisture measuring device (12) is connected to an analog selection circuit (16).
), cptr (18
) circuit, and the output side of the CPU (18) circuit is connected to the hot air temperature control unit (13) connected to the hot air generator (7).
). Moisture sensor (15)
.

Each detection signal of the grain amount detection section (8) is sent to the analog selection circuit (1
6) As each K is input, cpU (18)
The moisture sensor is selected by the command signal from the side (1
5) 0 converter (17) sequentially from the analog signal
K is converted into a digital value and each appropriate C20
(18) is stored in the storage device. Then, the initial hot air temperature of 60°C or more (for example, 65°C) of the grain (high moisture paddy) is calculated from the measured value of the moisture sensor (15) and the measured value of the grain amount detection unit (8). At the same time, an arbitrary finished moisture value (for example, 14.5%) is reached while performing a drying action at a standard drying loss rate (for example, 0.9%/hour) in the area of grain moisture of 16-21 seconds in the drying process. The hot air temperature for each hour (1 hour, 2 hours...X hours) is calculated and stored in the storage device within the CPTT. And the digital value calculated for each time is
The hot air temperature controller (1
3), and each time the temperature control unit (13
) to gradually lower the hot air temperature. In addition, the temperature of the hot air may be lowered stepwise, such as 55°C with 219g of moisture and 45°C with 16g of moisture.
Immediately before the end of drying, the finished moisture value is checked using the moisture meter.

In this way, the automatic control device for a grain dryer according to the present invention, when the work of loading grain into the dryer is completed, uses the moisture sensor and the grain amount detection section of the moisture measuring device to measure the moisture content of the grains and the grain amount. In addition to measuring the initial hot air temperature to a desired high temperature, during the drying work, the control device is set to adjust the hot air temperature appropriately by the signal from the clock, and gradually decreases the temperature by 1 or more. As a result, drying efficiency is extremely high, and high-quality dried grains without split grains, heat-damaged grains, germination-impaired grains, etc. can be reliably, smoothly, and quickly mass-produced.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a front sectional view of the grain dryer, and FIG. 2 is an electrical circuit diagram of its control device. 1...Drying section body 2...Hot air room 8...Grain drying room 4...Exhaust room 5...Fire heat generator
6...Exhaust fan 7...Hot air generator 8.
... Grain amount detection section 9 ... Grain Cypress lO ... Elevator 11 ... Grain circulation process 12 - ... Moisture measuring device 18 ... Hot air temperature adjustment section 14 ... Control device 1
5... Moisture sensor 16... Analog selection circuit 17... - converter 18... CPU patent applicant No. 2 WJ

Claims (1)

[Claims] In addition to having a grain drying room, a hot air room, and an air exhaust room in parallel, a grain tank with a grain amount detection unit is placed on top of the drying unit body equipped with a hot air generator to form a grain circulation process. A moisture measuring device is provided in the circulation process, and a hot air temperature adjusting section is provided in the hot air generating device, and the grain amount detecting section and the moisture measuring device are connected to the hot air temperature adjusting section through a control device, and The hot air temperature control unit is electrically connected to the controller and adjusted by a signal from a timer such as a timer, so that the hot air temperature is lowered stepwise or gradually to dry the grains. Machine automatic control device.