JPH065598Y2 - Grain dryer timer controller - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a timer control device for a grain dryer, and in particular, by operating the timer mechanism only during the drying operation, the grain dryer is stopped during the drying operation. The present invention relates to a timer control device for a grain dryer capable of easily predicting and setting the drying operation time of the above.

[Prior Art] In a circulation type grain dryer, the fed grain is gradually dried in a drying section by hot air generated by driving a burner and a blower, and the dried grain is collected in a grain collecting section and is then fried. Lift by a grain machine and disperse in the storage part. Tempering is performed in the storage part to equilibrate the moisture content in the grain, and drying is repeated until the target stop moisture value is reached while repeating the cycle of drying again. There is something.

When drying this grain, predict the drying operation time from the start of the drying operation until the target stop moisture value is reached, and set this drying operation time with a timer mechanism etc. to continuously operate the grain dryer. There is. When the set drying operation time elapses, the operation of the grain dryer is terminated.

[Problems to be solved by the invention]

However, the continuous drying operation of grain causes problems such as deterioration of the stopped moisture value, occurrence of noise pollution at night due to long-time drying operation, and further restriction of dust outflow. However, it is troublesome for the driver to control the dryer each time, and fatigue is increased.

Therefore, the applicant of this invention stopped at a predetermined set time.
An application has already been filed for a grain dryer equipped with a time delay mechanism so that it can be restarted and stopped during the drying operation.
No. 4682).

In the dryer whose operation is controlled by the time delay mechanism, the time delay mechanism is configured by the control unit (microcomputer).

However, if the control unit (microcomputer) fails and stops, operations such as grain discharge, circulation and ventilation cannot be performed at all, and there is a disadvantage that the quality of grains deteriorates. Therefore, for example, the operation is compensated by a timer mechanism so that the air can be blown or discharged, and the drying operation time is set by this timer mechanism, and the pause operation is performed during the drying operation by the time delay mechanism.

However, as described above, when setting the drying operation time by the timer mechanism, the total drying operation time must be predicted by further considering the rest operation time in the actual drying operation time required to reach the stopped moisture value. However, there was an inconvenience that the prediction and setting of the drying operation time became complicated.

[Purpose of device]

Therefore, the purpose of this invention is to eliminate the above-mentioned inconveniences.
When the burner drive and the operation of the grain dryer are suspended, the operation of the timer mechanism is stopped in order to stop the subtraction timing in the previous stage time period, and the burner is restarted and the grain dryer is restarted. By providing a timer control unit that reactivates the timer mechanism to start the subtraction timing, the time delay mechanism operates during the drying operation time set by the timer setting knob of the timer mechanism to drive the burner and the operation of the grain dryer. When the burner is driven and the grain dryer is stopped when the and are stopped, the timer mechanism stops the subtraction and counting of the timer mechanism.Therefore, the timer mechanism predicts only the actual drying operation time regardless of the stop operation time. Therefore, it is necessary to set the drying operation time and to realize the timer control device of the grain dryer which can easily predict and set the drying operation time.

[Means for solving problems]

It has a timer setting knob to set the dry operation time, and a timer mechanism that subtracts the dry operation time set only during energization time to perform the dry operation until it reaches zero, a reserved dry setting dial and a dry operation time reserved reading The switch includes a switch to generate a resting operation signal in the preceding stage time period, and a reservation suspension setting dial and a resting operation time reservation reading switch to issue a drying operation signal in the latter stage time period. After the time limit, the time limit mechanism that prohibits the time setting of the reserved dry operation and the reserved pause operation, and the time limit mechanism stops upon receiving the signal issued in the preceding stage time period and operates in response to the signal issued in the latter stage time period. Controls the timer mechanism, including a stop switch, various safety switches, a stop signal for the moisture meter, and a stop signal for the timer mechanism. A timer control unit that stops depending on the deviation, a display unit that is set in the time limit mechanism and displays a reserved dry operation time and a reserved suspension operation time, and an alarm device that issues an alarm prior to the latter-stage time limit. Characterize.

[Action]

According to the configuration of the present invention, the timer control unit stops the operation of the timer mechanism to stop the subtraction timing when the drive of the burner and the operation of the grain dryer are stopped in the preceding time period, and
At the subsequent time limit when the burner is restarted and the grain dryer is restarted, the timer mechanism is restarted to start the subtraction timing. As a result, the timer mechanism is stopped during the rest operation and operates only during the dry operation time.Therefore, the timer mechanism can predict the actual dry operation time regardless of the rest operation time and set the dry operation time. Good. Therefore, it is possible to easily predict and set the dry operation time. In addition, since the reservation of a new drying operation is prohibited after the second-stage time limit, there is no inconvenience such as a delay in drying due to an erroneous operation.

〔Example〕

Embodiments of the present invention will be described in detail and specifically with reference to the drawings. FIGS. 1 to 3 show an embodiment of the present invention. In FIGS. 1 and 2, 2 is a circulation type grain dryer. The grain dryer 2 has a storage unit 4, a drying unit 6, a grain collecting unit 8, and a fried machine 10. Grains lifted up by the grain lifting machine 10 are evenly dropped into the storage unit 4, dried in the drying unit 6, and then collected in the lower portion of the grain collecting unit 8. The collected grains are transferred to the lower part of the fried machine 10 and are repeatedly fried to be dried until the target stop moisture value is reached.

The drying unit 6 includes a burner 12 and a blower (not shown) provided on the front side for generating high-temperature air, and an exhaust fan 14 provided on the back side. The hot air generated by the burner 12 and the blower flows through the drying unit 6 to dry the grain. A control panel 16 that controls the operation of the grain dryer 2 is provided above the front surface of the burner 12.

As shown in FIG. 3, the control panel 16 includes a grain dryer 2
Monitor display 18 for displaying the operating states of the respective parts, stop moisture setting switch 20, grain amount setting switch 22, operation switch 24, stop switch 26, and first indicator 2
8, a second display 30, a grain type setting switch 32,
A timer mechanism 34 for setting the drying operation time, and a device such as a time limit mechanism 36 for stopping and restarting the burner 12 and stopping and restarting the grain dryer 2 at a desired set time are provided.

When the operation switch 24 is pressed, the drying operation is started, and when the stop switch 26 is pressed, the drying operation is stopped.

The first display 28 displays the moisture value of grain. The second indicator 30 always displays the hot air temperature and the grain temperature. The second display 30 is also used to display each time described later.

When the hot air temperature and the grain temperature are displayed on the second display 30, the hot air temperature lamp 38 and the grain temperature lamp 40 are turned on. When displaying this time, the time lamp 42 is turned on.

In the timer mechanism 34, the timer setting knob 44
The drying operation time is set by. The timer mechanism 34
The set dry operation time is subtracted and counted, and the operation is terminated when the time reaches zero. Further, the timer mechanism 34 is stopped by the microcomputer 74, which is a timer control unit described later, in the front stage time period and is reactivated in the rear stage time period as described later. Therefore, the actual drying operation time can be set in the timer mechanism 34 regardless of the rest operation time as described later.

The time delay mechanism 36 includes a reserved drying setting dial 46 for setting a reserved drying operation time which is a front time period within the drying operation time by the timer mechanism 34, and a reservation suspension setting dial 48 for setting a reserved suspension operation time which is a subsequent time period. A reserved dry read switch 50 and a reserved pause read switch 52 are provided to allow the microcomputer 74 to read the times set by the reserved dry setting dial and the reserved pause setting dials 46 and 48, respectively.

Reserved drying setting dial 46 and reserved drying reading switch 5
When the reserved drying operation time is set by 0 and read by the microcomputer 74, the second display 30 which normally displays the hot air and the grain temperature is switched to the time display of the reserved drying operation time, and at the same time, the hour lamp 42 is displayed. And the dry operation lamp 54 are turned on. When the set time has elapsed, the second display 30 returns to the temperature display, and the time lamp 42 and the dry operation lamp 54 are turned off. Next, when the reserved suspension operation time is set and read by the reservation suspension setting dial 48 and the reservation suspension read switch 52, the second display unit 30 switches to the time display of the reservation suspension operation time, and at the same time, the time lamp 42.
And the rest operation lamp 56 are turned on. When the set time elapses, the second display 30 returns to the temperature display as in the above. As a result, it is possible to confirm on the second display device 30 that each reserved operation time has been set and read. Further, the second display 30 always displays the temperature, but since the second display 30 is used to display the remaining time described later together with each reserved operation,
It can contribute to cost reduction.

The remaining time switch 58 causes the second display 30 to display the remaining time at each reserved operation.

That is, when the remaining time switch 58 is pressed during the reserved drying operation, the time lamp 42 and the drying operation lamp 54 are turned on,
The remaining reserved drying operation time is displayed on the second display 30. When the set time has elapsed, the display is turned off. Next, the resting operation lamp 56 lights up together with the time lamp 42, and the second display unit 30 displays the read reserved resting operation time. When the set time has passed, the display goes off,
The hot air temperature lamp 38 and the grain temperature lamp 40 are turned on, and the second indicator 30 displays the hot air temperature and the grain temperature. During the reserved drying operation, the drying operation lamp 54 is continuously turned on to sense the reserved drying operation, and when the remaining time is displayed on the second display 30, the drying operation lamp 54 and the rest operation lamp are respectively displayed. 5
By blinking 6 it is possible to sense that the remaining time is displayed.

Further, during the reserved suspension operation, the suspension operation lamp 56 is continuously lit, and only when the remaining time switch 58 is pressed, the time lamp 42 is illuminated and the remaining reserved suspension operation time is displayed on the second display 30 for the set time. , The second indicator 30 is turned off at other times. Alternatively, the rest operation lamp 56 may be continuously lit, and the remaining reserved rest operation time may be continuously subtracted and displayed on the second display 30 as the time lamp 42 is lit.

In this way, the worker can be made aware of the operating state of the grain dryer 2 and the remaining time, so that the operating condition can be easily grasped and the workability can be improved. Further, since it is possible to easily discriminate the stop due to a failure or the like by clearly sensing the reserved suspension operation, it is possible to reduce the labor without causing the worker to feel unnecessary anxiety. Note that during the dry operation by the timer mechanism 34 after the end of the reserved suspension operation, setting and reading of the reserved operation time by the reservation reading switches 50 and 52 are prohibited as described below, and the operation of the remaining time switch 58 is enabled. do not do. This is to prevent delaying the restart of the dry operation due to the resetting / rereading of each reserved operation time after the reserved suspension operation. Further, the remaining time can be sensed by the display of the timer mechanism 34, and the operation of the remaining time switch 58 is not required.

The control by the control board 16 is performed by each control circuit as shown in FIG. In FIG. 4, 60 is an outside air humidity sensor, 62 is an outside air temperature sensor, 64 is a hot air temperature sensor,
66 is a moisture meter, 34 is a timer mechanism, 36 is a time limit mechanism, 2
4 is an operation switch, 26 is a stop switch, 58 is a remaining time switch, 68 is various safety device switches, and 70 is an A / D.
A conversion circuit, 72 is an encoder, and 74 is a microcomputer.

The microcomputer 74 is mainly composed of a CPU (central processing unit), a ROM (read-on memory), a RAM (random access memory), etc., controls the operation of the grain dryer 2, and constitutes a timer control section. It is a thing.

In addition, the microcomputer 74 stops the operation of the timer mechanism 34 at the above-described pre-stage time period and re-activates it at the above-mentioned post-stage time period. Reference numeral 28 is a first display, 30 is a second display, 18 is a monitor display, and 76 is a buzzer for issuing an alarm prior to re-driving the burner 12 and other various alarms.

80 is a burner drive circuit, 82 is a motor drive circuit,
The burner drive circuit 80 and the motor drive circuit 82 drive the respective loads by the control signal output from the microcomputer 74.

The burner drive circuit 80 includes an ignition heater 84 and an ignition valve 8.
6, drive control of the pump 88 and the burner fan motor 90.

Further, the motor drive circuit 82 drives and controls the conveyor motor 92, the circulation motor 94, the dust ejector motor 96, the exhaust fan motor 98, and the moisture meter motor 100.

Next, the operation of this embodiment will be described.

The dry operation time is set by the timer setting knob 44 of the timer mechanism 34, the reserved dry operation time is set by the reserved dry setting dial 46, and the reserved pause setting dial 4 is set.
8 sets the reserved suspension operation time.

Next, as shown in FIGS. 5A and 5B, when the operation switch 24 is pressed at time t ₀ , the grain dryer 2 is operated by the operation start signal, and at the same time by the drying operation signal and the burner operation signal. The burner drive circuit 80 and the motor drive circuit 82 drive the burner 12 and the motors 92 to 100. As a result, the timer mechanism 34 starts the timer drying operation within the set time after the operation is started.

Next, when the reserved dry read switch 50 and the reserved pause read switch 52 are caused to read the reserved dry operation time and the reserved pause operation time at time t ₁ , the microcomputer 7
Scheduled drying operation starts according to 4.

Then, when the reserved drying operation is completed and the time limit t ₂ is reached, the microcomputer 74 stops the drying operation signal and the burner operation signal by the stop operation signal, and the burner 1 is stopped.
2 and each of the motors 92 to 100 are stopped, and a reservation suspension operation is started. At this time, the microcomputer 74 stops the operation of the timer mechanism 34 and stops the subtraction timing.

The reservation deactivation operation is subsequent timed serving t ₃ when terminated prior to restart immediately before, the microcomputer 74 operates the alarm buzzer 76, then issues a re-drive signal. Consequently, when a the above time t _3, and re-driven so the burner 12 and the motors 92 to 100 with entering the timer drying operation, re-activates the timer mechanism 34 starts subtraction counting.

Before the completion of the timer drying operation by the timer mechanism 34, the microcomputer 74 stops the burner operation signal to stop the burner 12.

Then, at time t ₄ , the subtraction timing of the timer mechanism 34 becomes 0, so that the output of the drying operation signal is stopped, the respective motors 92 to 100 are also stopped, and the operation of the grain dryer 2 is ended.

As described above, the timer mechanism 34 is not operated during the reserved suspension operation from the time t ₂ which is the front time period to the time t ₃ which is the rear time period, and the timer mechanism 34 is operated only during the dry operation. Irrespective of the number of times, only the actual drying operation time may be predicted and the drying operation time may be set in the timer mechanism 34. Therefore, it becomes easy to predict and set the drying operation time of the grain.

6 to 8 show the control when another reserved driving time is read.

The solid line in FIG. 6 shows the case where the reserved drying / resting operation is set and read before the operation starts, and the broken line shows the case where the reserved drying operation is reread during the reserved drying operation.

The solid line in FIG. 7 shows the case where the reserved drying operation is read after the start of operation, and the broken line shows the case where only the reserved suspension operation is read after the start of operation.

FIG. 8 shows a case where the setting of the drying operation time by the timer mechanism 34 is shorter than the setting of the reserved drying / resting operation time read. In this case, the drying operation ends when the setting by the timer mechanism 34 is prioritized and the subtraction time count becomes 0.

As described above, the reserved drying operation time and the reserved suspension operation time are set and read so that the suspension time can be variously set to operate the grain dryer 2, thereby improving the accuracy of the stopped moisture value. It also contributes to the reduction of noise pollution and the fatigue of the driver.

However, if the resetting / rereading of each reserved operation time is allowed after the reserved stop operation, the restart of the dry operation is delayed, so that the reserved dry operation time and the reserved stop operation time can be read as shown in FIG. And set the read prohibited area. Thereby, the operability of the grain dryer 2 can be ensured.

[Effect of device]

As is clear from the above detailed description, according to the present invention,
It has the following effects.

The timer mechanism only needs to predict and set the actual drying operation time regardless of the rest operation time, and the setting operation is easy.

Even if the reservation is changed during the drying process, the reservation reception is prohibited after the second-stage time limit, so that there is no inconvenience that the completion of the drying process is delayed due to an erroneous operation.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a front view of a grain dryer, FIG. 2 is a side view of a grain dryer, FIG. 3 is an enlarged front view of a control panel, and FIG. Is a system block diagram of the control system, and FIGS. 5A and 5B are time charts of the control operation. 6 to 8 are time charts of the control operation showing the control when another reserved driving time is read. FIG. 9 is a diagram showing a reading area for reserved driving. In the figure, 2 is a grain dryer, 12 is a burner, 14 is a blower, 16 is a control panel, 24 is an operation switch, 26 is a stop switch, 28 is a first indicator, 30 is a second indicator, 34
Is a timer mechanism, 36 is a time limit mechanism, and 74 is a microcomputer.

Claims (1)

[Scope of utility model registration request] 1. A timer control device for a grain dryer, wherein each of the following items A to E is used as a constituent element. A. Has a timer setting knob to set the dry operation time,
A timer mechanism that subtracts the set drying operation time only during the energization time and performs the drying operation until it reaches zero. B. It has a reserved drying setting dial and a dry operation time reservation reading switch, and it issues a pause operation signal in the previous period, and it also has a reservation pause setting dial and a pause operation time reservation reading switch to set a dry operation in the latter period. A time delay mechanism for issuing a signal, which prohibits the time setting of the reserved drying operation and the reserved suspension operation after the latter time period, C. The time limit mechanism controls the timer mechanism so as to stop in response to the signal issued in the preceding stage time period and to operate in response to the signal issued in the latter stage time period, and to stop the stop switch, various safety switches, and the moisture meter. A timer control unit that stops by either a signal or a stop signal of the timer mechanism, D. A display unit for displaying the reserved dry operation time and the reserved suspension operation time set in the time delay mechanism; E. An alarm device for issuing an alarm prior to the latter time period.