JPS63302286A - 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 (Field of application on M beams) The present invention relates to a grain dryer for drying grains such as paddy and wheat.

(Prior art) A method of importing all measured data and calculating the moisture value of the grain to perform drying work, or a method of removing data on green rice, immature rice, etc. and calculating the moisture value of the grain from the remaining data. There is a way to calculate and perform drying work.

(Problems to be solved by this invention) However, first
In the method described in No. 11, when the measured moisture value of the grain approaches the target moisture value, the drying process is continued when high moisture data such as green rice is acquired, so that the grain is Quality may deteriorate due to cracking of grains.

In addition, with the second method, when drying grains containing a large amount of green rice, the water content of the green rice may be absorbed by other grains after the drying process, resulting in a moisture content higher than the target moisture content. . Therefore, when performing re-drying, the operator has to take the sample grains, measure the moisture content with a manual moisture meter, and perform additional drying operations.

This causes a decrease in drying efficiency.

(Means for Solving the Problems) This invention aims to improve work efficiency, and has taken the following technical measures.

That is, until the target moisture value is reached, the grain moisture value is calculated from the measured value with abnormal values removed, and when this target moisture value is reached, the grain moisture value is calculated from the measured value including the abnormal value, and this calculated value is The grain dryer is configured to finish the drying operation after the remaining drying time calculated from the target moisture content and the target moisture content.

(Operation) The grain moisture value is calculated by taking in the measured values from which abnormal values have been removed up to the target moisture value. Then, when this calculated value reaches the target moisture value, the moisture value is calculated from the measured values including the abnormal value. Then, the drying operation is performed until the remaining drying time calculated from this calculated value and the target moisture value has elapsed.

(Effect) Abnormal values are removed and the moisture value is calculated until the target moisture value is reached, so if the moisture value is used as a factor in setting the hot air temperature, the hot air temperature will not become too high. It is possible to prevent quality deterioration due to shell cracking. In addition, when the target moisture value is reached, drying work is performed for the remaining drying time including abnormal values, so that after the drying work is completed, grains close to the target moisture value can be obtained, improving work efficiency. .

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings.

First, the structure will be described. The grain dryer 1 includes a main body 2, a burner 3, a suction fan 4, and a grain lifting device 5. The main body 2 includes a grain storage chamber 6, a drying chamber 7, and a grain collection chamber 8 from the top to the bottom, forming a grain passage. and.

While the grains flow down the drying chamber 7, they are exposed to drying air, which is a mixture of hot air from a burner 3 and outside air sucked in by a suction fan 4, to receive a drying action.

A lower helix 9 is rotatably installed in the lower part of the grain collection chamber 8, and this lower helix 9 is configured to convey the grains discharged into the grain collection chamber 8 toward the grain lifting device 5 side. be. Then, the grain lifting device 5 is configured to fry the grain and supply it to the upper helix 10 which transports the grain to the upper central part of the grain storage chamber 6. Therefore, the grains are circulated through the grain storage chamber 6, the drying chamber 7, the grain collection chamber 8, and the grain lifting device 5, and are subjected to a drying action until the target moisture content is reached.

To explain the block circuit of FIG. 2, 11 is a memory (not shown) containing control programs, necessary data, etc.
A calculation control unit of a microcomputer (hereinafter referred to as C
The CPU 1 performs arithmetic and logical operations and comparison operations, and the information input to the CPU 1 includes information about the grain information provided in the grain frying device 5 and to be fried by the grain frying device 5. The measured moisture information output from the moisture meter 12 that takes in a part of the grain and measures the moisture content of the grain, and the operation switches 1 such as the tension switch, drying switch, and tension input switch.
3, various detection information output from sensors 4 such as a hot air temperature sensor, wind pressure sensor, flame rond, outside temperature sensor, and grain flow sensor, and output from a target moisture setting switch 18. There is target moisture information.

Further, the drive command signal outputted from the CPU 1 includes a fuel oil amount control signal that takes input information from an outside temperature sensor, a filling amount switch, and a type selection switch to control the amount of combustion fuel oil in the burner 5; Fuel ignition signal and fan 1
There are a fan command signal that commands the start or stop of the motor 6 and a motor command signal that commands the start or stop of the motor 17, which is the drive source of this machine. The functions of CPU II are as follows. That is, (1) the fuel oil amount, that is, the self-oscillating hot air temperature is calculated by taking in the information output from the filling amount sensor, outside temperature sensor, and type selection switch. (2) Taking in the moisture information that is periodically measured and output from the moisture meter 12, and when this data reaches a predetermined value, calculates the moisture value (for example, average value). When performing this calculation, only data whose measured values are within the upper and lower limit values for abnormality determination are taken in as calculation data until the target moisture value Mf set by the target moisture information switch 18 is reached. When the value is reached, all measured values are taken in and the moisture value is calculated. ■Outputs a fuel supply stop signal when the target moisture value is reached.

The remaining drying time ((calculated value - target moisture) is calculated from the calculated value calculated in step 2) and the target moisture value. Also, a stop signal to stop driving the motor 17 is output.

Next, the operation will be explained using the flow chart of FIG.

First, after loading the grain into the machine, input the respective information by operating the variety selection switch and loading site input switch.

Further, a target moisture content (in the example, 15%) is set. Then, the CPU II takes in this information and the outside temperature information output from the outside temperature sensor and calculates the fuel supply amount. Then, when the worker operates the drying switch,
The fuel is ignited by the ignition heater that receives a command from the PUII (step 10), the fan 16 is started, and the motor 17 is started. Therefore, the grains pass through the grain storage chamber 6, the drying chamber 7, the grain collection chamber 8, the grain lifting device 5, and each helix 9.10, but while passing through the drying chamber 7, the supplied fuel oil They are dried by being exposed to a drying air created by mixing the hot air generated by combustion with the outside air drawn in by the fan 16. During such drying work (step 20), the moisture meter 12 periodically measures the moisture content of the grains (step 30), so the CF
ULL takes in this data, compares the data with the upper and lower limit values for abnormality determination, removes abnormal values (for example, green rice), and calculates the moisture value when the remaining data reaches a predetermined number (step 40).

Next, the CPU II uses this calculated value Ms and the target moisture value Mf.
When it is determined that the calculated value Ms is larger than the target moisture value Mf (step 50), the drying operation is continued. Then, when it is determined that the calculated value Ms is smaller than the target moisture value Mf, that is, the target moisture value has been reached,
The CPU II stops the fuel supply and extinguishes the burner 15 (step 60). And C0UII is moisture meter 12
After taking in the measured data and calculating the moisture value of the grain (step 70), this calculated value M1 and the target moisture value M
The remaining drying time is calculated from f (step 80). Then, the CPU II outputs a fuel supply command signal and an ignition signal to restart the drying operation (step 90), and then stops the drying operation when the row drying time has elapsed.

Therefore, up to the target moisture value Mf, the moisture value is calculated by removing abnormal values.1 For example, when controlling the drying rate, it is possible to reduce the adjustment range of the hot air temperature and perform stable drying work. can.

Further, the remaining drying time is calculated by calculating the moisture value including the abnormal value from the set moisture value Ml, and the operation is stopped after this time has elapsed, so that the accuracy of the operation can be improved.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention. FIG. 1 is a side sectional view of the grain dryer, FIG. 2 is a block circuit, FIG. 3 is a flowchart, and FIG. 4 is a diagram showing the relationship between drying time and grain moisture.

Claims (1)

[Claims] The grain moisture value is calculated from the measured value with abnormal values removed until the target moisture value is reached, and when the target moisture value is reached, the grain moisture value is calculated from the measured value including the abnormal value, and this calculated value and the target value are calculated. A grain dryer configured to finish drying work after a remaining drying time calculated from moisture content has elapsed.