JPS6224226Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a grain dryer that performs grain drying under set grain drying conditions.

BACKGROUND ART Conventionally, grain dryers have been put into practical use that are equipped with setting knobs such as a volume control switch and a rotary switch for setting drying conditions. That is, when executing drying, the setting knob is set to a set position, and grain drying is performed based on the drying conditions determined by the set position. However, conventional grain dryers do not have a memory unit that stores drying condition settings even after the power is turned off, so the drying conditions must be set using the above setting knob each time drying is started after the power is turned on. I had to go back and do it. For this reason, especially in conventional grain dryers, when grain drying is repeatedly performed under the same drying conditions, the same setting operation using the setting knob is repeated, resulting in the problem that the drying operation cannot be performed smoothly. . In addition, since the position of the setting knob corresponds to the set value of the drying conditions, it may lead to a situation where the position of the knob is deviated from the set position, but the drying operation is started mistakenly as the set position. Ta. Furthermore, since conventional grain dryers do not have a memory unit for storing set values, setting knobs are provided for each drying condition, which has the disadvantage of complicating the configuration of the dryer's operation and control units. Ta.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
To provide a grain dryer that has a simple configuration and can accurately and easily set drying conditions.

To summarize, this invention includes an input means for inputting set values of grain drying conditions, a non-volatile storage means for storing standard values of drying conditions in advance, a display means for displaying the standard values when setting the drying conditions, and a display means for displaying the standard values when setting the drying conditions. and an instruction means for instructing whether or not to perform grain drying based on a standard value, and when the instruction means instructs execution of grain drying based on the standard value, the standard value is directly set as the drying condition value. It is characterized by

The above-mentioned non-volatile storage means is a battery-backed RAM or the like.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a schematic structural diagram showing the main structure of a drying section of a circulating grain dryer, and FIG. 2 is a control block diagram of the same circulating grain dryer.

As shown in FIG. 1, the grain 2 loaded in the dryer is transported by the circulation device 3, rotary valves 4, 5, and screw conveyor 6.
It is conveyed to the storage tank 1 again through the drying chambers 7 and 8, which are separated into two chambers, and the circulation passage 9. The drying chambers 7 and 8 form a drying passage, to which hot air is applied by a hot air generator 10. While being circulated, the grains are successively dried by hot air a and b in the drying chambers 7 and 8, and then conveyed into the storage tank 1 again. This hot air generator 10 has a combustion burner and a blower inside, and provides hot air to grains by combustion of the combustion burner. Fuel is supplied to this combustion burner from a fuel cylinder 13 through a fuel supply pipe 14 of a fuel supply path. Therefore, the amount of heat of the hot air can be changed by either or both of the amount of fuel supply and the amount of air blown. Also, this pipe 14
An electromagnetic valve 11 that opens and closes the supply path and an electromagnetic pump 12 that supplies fuel by pulse drive are provided in the middle.

Further, the solenoid valve 11 is opened during combustion by a control means (not shown). Furthermore, although not shown, an ignition heater for igniting the combustion burner, a fuel supply path for the heater, and an ignition solenoid valve are also provided. Hot air sensors 15 are installed on the outer walls of the drying chambers 7 and 8, and a moisture meter 16 is installed inside the storage tank 1, respectively.

As shown in Figure 2, the control section of this grain dryer is
CPU20, ROM2 that stores control programs
1. RAM 22 that stores various control parameters such as drying condition values during execution; RAM 2 that stores standard values of grain drying conditions backed up by battery;
3, a timer 24, and I/Os 29 and 30, which are interconnected by a bus. A display 19 and an A/D converter 25 are connected to the I/O 29, and the output of the keyboard 18 is also introduced. A hot air sensor 15 that detects hot air temperature, a moisture meter 16 that detects the moisture content of grains, and an outside air temperature sensor 17 that measures outside air temperature are connected to the A/D converter 25 via a multiplexer 26. The I/O 30 includes the drive circuit 27 of the electromagnetic pump 12 and the burner ignition device 2.
Various drive circuits such as No. 8 are connected.

The ROM 21 contains a program that executes hot air drying under set grain drying conditions according to a grain drying curve representing the relationship between time and moisture content until the moisture content measured by the moisture meter 16 reaches the stop moisture content, an error judgment routine, and moisture content. Programs such as meter measurement routines and timer routines are stored. RAM2
2 includes set value storage areas S1 to 2 for storing set values for grain drying conditions, that is, grain amount, stop moisture content, grain type, drying characteristics, air temperature correction value, and timer set value, as shown in FIG. S6, parameter areas P1 to P3 for storing control parameters such as moisture content, hot air temperature, and outside air temperature; table area T1 for storing drying curve data for each type of grain; operation modes for draft ventilation, drying, discharge, and standby status; It includes an area M1 for storing . Also RAM23
stores data such as grain type, drying characteristics, wind temperature correction value, and timer value as standard values. The hot air temperature is the temperature of the hot air generated by the hot air generator 10, and is a control parameter for controlling the heat amount of the hot air. Further, the drying curve data is data regarding time-moisture content which is determined in advance through experiments depending on the type of grain.

The above grain drying conditions are set using the keyboard 18. The keyboard 18 is provided in the operating section (not shown) of the dryer, and its key arrangement is shown in FIG. 4. The numeric keys "0", "1", "4", and "7" are used together with the "mode" key to set discharge, drying, ventilation, and tensioning modes, respectively.
The number keys "2", "3", "5", "6", "8", and "9" are grain type, timer setting value (drying time), stop moisture content, wind temperature correction value, and grain amount, respectively.・Used to set drying characteristics. The "Settings" key is a key for instructing whether or not to execute grain drying based on each set value of the above drying conditions.
Used when setting drying characteristics, air temperature correction value, and timer setting value. "Moisture meter manual" key is moisture meter 1
It is used when displaying the moisture content measured by 6 on the display 19. In this example, it is possible to select and set grain types such as paddy, wheat, and beer barley, and also select drying characteristics of hot air control such as constant temperature, high speed, standard, and safe, which have different drying speeds depending on the grain type. can do. In the drying mode, hot air control is performed according to the drying curve selected and set from the RAM 23 by operating the grain type setting key, and the electromagnetic pump 12 is driven until the moisture content reaches the stop moisture content. The temperature of the hot air generated from the hot air generator 10 at this time is initially set from the drying curve, drying characteristics, outside air temperature, and amount of grain, and is +5°C by the air temperature correction value setting key.
It is possible in the range of -10℃ to -10℃. The execution time of each operation mode is set by a timer setting value setting operation, and if the "stop" key is pressed during execution, the execution is immediately stopped. Note that when setting the grain drying conditions, the set values stored in the RAM 23 are displayed on the display 19, and the values inputted from the keyboard 18 are also displayed on the display 19. As the display 19, a seven segment (seg) LED or the like is used.

In the grain dryer configured as above,
The input means of this invention is the keyboard 18, the nonvolatile storage means is the RAM 23, and the display means is the display 1.
9 corresponds to the instruction means and the "setting" key, respectively.

Next, the operation of setting grain drying conditions in this grain dryer will be explained.

5 to 8 are flowcharts showing the setting processing operation. After turning on the power, step n1 (hereinafter referred to as
Step ni is simply called ni. ), the drying curve, drying characteristics, etc. are initialized, the grain drying condition settings stored in RAM23 are
Along with n2 transferred to n2, the error determination routine process starts at n3. At n4, "Stop"
The presence or absence of key operation is determined, and if the "stop" key is pressed, the process moves to steps n19 to n23 shown in the flowchart of FIG. 6A. At n19, it is determined whether or not the "stop" key has been operated while the drying mode is being executed. If it is drying, it will be set to ventilation mode.
Furthermore, the clock by timer 24 is started, and 10
n20 to n22 return to n4 when the minute has elapsed. If it is not drying, stop driving the electromagnetic pump 12, etc.
23.

If the "Stop" key is not pressed, move to n5,
It is determined whether or not the "moisture meter manual" key has been operated, and if the "moisture meter manual" key is pressed, the process moves to steps n24 to n26 shown in the flowchart of FIG. 6B. n
At steps 24 and n25, it is determined whether or not the "moisture meter manual" key operation was performed during execution of ventilation or drying mode. If it is in the ventilation or drying mode, the process moves to moisture meter measurement process n26, displays the moisture content, and then returns to n4.

If the "moisture meter manual" key is not pressed, n6~
The process moves on to the mode setting process of n14. First in n6,
If you press the ``Mode'' key and then press the ``Placement'' key, the stakeout mode is set. n7, n8.
Similarly, if the "ventilation" key is pressed, the ventilation mode is set to n9, n10, and if the "dry" key is pressed, the drying mode is set to n11, n10.
n12, and if the "eject" key is further pressed, the eject mode is set. n13, n14. In addition,
At n6, the dryer is in a mode setting standby state.

After the mode setting is completed, grain amount and stop moisture content setting processing is performed in steps n15 to n18. The grain amount is set by pressing the "grain amount" key and inputting the predetermined value using the numeric keys.n15,n
16. The stop water content setting is performed by pressing the "stop water content" key and then inputting a predetermined value using the numeric keys (n17, n18).

Next, proceed from n18 to n30, [see Figure 7],
The routine begins to set grain drying conditions. n3
0 to n36, it is determined whether or not the "grain type" key, "drying characteristics" key, "air temperature correction" key, or "timer" key is pressed. If any key is pressed, n3 depending on the respective pressed key.
Proceed to step 1, n33, n35, or n37.

n31 is a grain type setting key-in processing step. This step executes the subroutine shown in FIG. 8A. First, at n50, the value of "grain type" stored in the RAM 23 is displayed on the display 19. This display value has been set as a standard value in RAM.
If the data set and stored in 23 differs from the value of the actual grain type to be dried, the operator operates the "clear" key, and n51 operates the "clear" key. n51, n52 which determines whether or not the button is pressed and clears the display if there is a key operation. Next, it is determined whether or not the "setting" key is pressed n53. When this "set" key is pressed, the displayed value at that time is set as one of the drying conditions. That is, after confirming in n54 that the displayed value is a correct value, the process advances to n55 and sets the displayed value in area S3 of the RAM 22. n5
If the "setting" key is not pressed in step 3, proceed to n57. Steps n57 to n59 are steps for changing the displayed value, and the value input using the numeric keys is pushed into the least significant bit of the displayed digit. In this way, when the displayed value corresponds to the type of grain you are trying to dry, click "Settings".
When you press the key, the displayed value at that time is n55.
It will be set in area S3 of RAM22.

Through the same operation as n31 above, the drying characteristics, air temperature correction value, and timer value are set to n33, respectively.
Areas S4, S5 of RAM22 with n35 and n37,
It is set to S6. In the case of timer value setting, as shown in FIG. 8B, after setting in the area S6 of the RAM 22, counting of the set value is immediately started at n60.

When setting drying condition values as described above, first display the various standard values stored in the RAM 23 in advance as standard values on the display, and if you want to use the values as they are, immediately press the "Set" button. On the other hand, if you want to set a value different from the standard value as the drying condition value, change the displayed value to the desired value and then press the "Set" key.

As described above, according to this invention, since the standard values are stored in advance in the non-volatile storage means, the operator does not need to memorize the standard drying conditions.
When performing general drying, it is sufficient to operate only the instruction means to set the conditions. Therefore, the operability is improved, erroneous operations such as inputting standard values by mistake can be prevented, and the operation panel surface is greatly simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of the main structure of the drying section of a circulating grain dryer in which this invention is implemented, and FIG. 2 is a control block diagram of the same dryer. Figure 3 shows RAM2
2 is a configuration diagram, and Figure 4 is a keyboard key configuration diagram.
5 to 8 are flowcharts showing the drying condition setting operation. 19...display unit, 23...(battery backed up) RAM.

Claims (1)

[Scope of utility model registration request] A grain dryer that dries grain under set grain drying conditions includes an input means for inputting set values for grain drying conditions, a non-volatile storage means for storing standard values for drying conditions in advance, and a comprising a display means for displaying a value, and an instruction means for instructing whether or not to perform grain drying based on the standard value, and when the instruction means instructs execution of grain drying based on the standard value; A grain dryer characterized in that standard values are directly set as drying condition values.