JPS627999Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a new grain dryer control device.
In particular, it is an object of the present invention to provide a new control device for a grain dryer that allows mode switching between an automatic operation mode and a manual operation mode to be performed simply and reliably by replacing a connector.

BACKGROUND TECHNOLOGY AND PROBLEMS Many control devices for grain dryers use microcomputers to automatically perform drying operations. By the way, in such a control device, automatic operation has often been stopped due to malfunction or failure of the microcomputer. If automatic operation is stopped in this way, the quality of the grain to be dried will deteriorate significantly.
Great damage will result. Therefore, when automatic operation is stopped, it is desirable to be able to continue drying by manual operation. Therefore, the automatic control device of the dryer that automatically controls the drying operation is also provided with an appropriate number of manual controls such as switches that can be operated manually, so that the drying operation can be performed manually as necessary. The inventors of the present invention have developed a device with the following structure. Specifically, the control device is as follows. That is, for each switch, relay, etc. that is turned on and off under the control of a microcomputer, a manual switch is provided to form a pair with it, and for each pair, a manual switch is provided to switch between automatic operation mode and manual operation mode. A changeover switch is provided to change the mode, and a signal from a switch automatically controlled by the mode changeover switch is sent to a control object such as a drive motor or relay, or a control signal from a manual switch is sent to a control object. It is made to do. However, in such a control device for a grain dryer, there is a problem in that as the number of objects to be controlled increases, the number of mode changeover switches increases, and the cost of the control device increases accordingly.
Furthermore, when changing the mode between the automatic operation mode and the manual operation mode, all the mode changeover switches must be changed, making the mode changeover relatively troublesome.

Purpose of the invention Accordingly, the present invention provides a new control device for a grain dryer that allows mode switching between automatic operation mode and manual operation mode to be easily and reliably performed by replacing the connector. It is something that I try to do.

Summary of the invention The configuration of the present invention to achieve the above object is to provide a grain dryer having a microcomputer section that outputs various control signals based on signals from various sensors and drives and controls various motors. an automatic control signal output section that inputs and outputs various contact signals corresponding to these, a manual control operation section that outputs various contact signals for manual operation, and an automatic control signal output section that outputs various contact signals for various manual operations, and the automatic control by attaching an automatic or manual short connector. a connector section for selectively connecting one of the various contact signals from the signal output section and the manual control operation section to a group of relays for driving the motor; According to the present invention, automatic operation can be achieved with the simple operation of simply replacing the connector. The mode can be easily switched between the mode and manual operation mode, and the power line to the microcomputer section can be turned on and off when switching modes, completely preventing malfunctions of the microcomputer. can do.

Embodiment The control device for the grain dryer of the present invention will be explained below according to the embodiment shown in the accompanying drawings.

The drawings are for explaining an example of the implementation of the control device for the grain dryer of the present invention, and FIG. 1 is a circuit block diagram showing the outline of the circuit configuration of the control device.

A microcomputer 1 processes input data and performs necessary calculations according to a predetermined program, and sends appropriate control signals to the automatic control signal output section 2. The automatic control signal output section 2 is mainly composed of a plurality of relays controlled by the microcomputer 1, the contents of which will be explained in more detail later with reference to FIG. Reference numeral 3 denotes a sensor section, which includes a number of sensors such as a hot air temperature sensor, a moisture meter, a grain temperature sensor, a paddy clogging sensor, an outside air temperature sensor, and a misfire sensor. Detection signals output from some of the sensors within this sensor section 3 are sent to the microcomputer 1, and detection signals output from the outside sensors are sent to a relay circuit section for driving a controlled object, which will be described later. Reference numeral 4 denotes an automatic operation operation switch section, which includes various switches that are operated at the start and end of automatic drying operation or when performing only ventilation, and various setting switches that perform various settings. The switches to be operated at the start and end or when only ventilation is required include a full stop switch 5 (SWO to be described later) that stops all operations of the dryer, as shown in Figure 2, and a full stop switch 5 (SWO to be described later), which stops all operations of the dryer as shown in Figure 2. a stop switch 6 for temporarily stopping the operation;
There are a filling switch 7, a drying switch 8, an ejection switch 9, and a ventilation switch 10. These are all push button switches. In addition, the setting switch includes a type switch 1 for setting the type of grain to be input.
1. Grain amount setting switch 12 for setting the input amount;
There is a stop moisture setting switch 13 for setting the final moisture content of the grain, that is, the stop moisture of the grain. All the signals output from the switches 5 to 13 in the automatic driving operation switch section 4 are input to the microcomputer 1.

14 is a numeric display, for example 4 of 8 segments.
It consists of several light emitting elements. This numeric display has display mode lamps 15 arranged below it, namely a time display lamp 15 ₁ and a moisture display lamp 1.
5 ₂ , the grain temperature display lamp 15 ₃ , and the hot air temperature display lamp 15 ₄ are displayed at any time with a fixed display timing. 16 is a manual control operation unit, which includes manual control switches SW1~
Consists of 6. SW1 is a main unit switch for manually controlling the feeding valve motor, SW2 is an elevator switch for manually controlling the elevator, SW3 is an exhaust fan switch for manually controlling the exhaust fan,
SW4 is a hot air blower switch for manually controlling the hot air blower, SW5 is a burner switch, and SW6 is a discharge damper switch. This manual control operation section 1
6 is arranged below the automatic operation switch section 4 of the panel 17, as shown in FIG.

18 is a connector, which includes an automatic control connector 18a that transmits the output signal of the automatic control signal output section 2 to the relay circuit section 19 for driving the controlled object, and an automatic control connector 18a that transmits the output signal of the manual control operation section 16 to the relay circuit section 19. There is a manual control connector 18m for transmitting data to. This connector 18 is connected to a connector mounting portion 20 provided below the manual control operation portion 16 of the panel 17.
will be installed on the That is, a large number of terminals connected to the output line of the automatic control signal output section 2, the output line of the manual control operation section 16, and the input line of the relay circuit section 19 can be fitted with the connector 18 at the connector mounting section 20. It is arranged like this. The terminals of the automatic control connector 18a are short-circuited so that the automatic control signal output section 2 and the relay circuit section 19 are electrically connected when the automatic control connector 18a is attached to the connector mounting section 20. Similarly, the terminals of the manual control connector 18m are short-circuited to electrically connect the manual control signal output section 16 and the relay circuit section 19. The connector 18a for automatic control and the connector 18m for manual control are fixed to each other. Incidentally, this connector 18 will be explained in detail later with reference to FIG. 4.

21 is a power source that supplies power to the microcomputer 1 and the relay circuit 19, and M ₀ to M ₄ are motors driven by the relay circuit 19.

In FIG. 2, which is a front view of the operation panel 17, 22 ₁ to 22 ₅ are operating status display lamps;
The lighting indicates the current operating state of the dryer, i.e., whether it is operating under automatic control or manual control, or whether it is operating, ventilating, or not. This is an indication of the nature of the situation. 23 is OK
As shown on this name plate, the signal section indicates when an abnormality occurs in each operating section, electrical system, or each sensor of the dryer. 24 is a power lamp, and 25 is an end lamp.

FIG. 3 is a circuit diagram of the automatic control signal output section 2, the manual control operation section 16, and the relay circuit section 19. In the figure, R1 to R7 are relays in the relay circuit section 19, and R1 is a full stop relay that operates a circuit (not shown) that stops the entire dryer, and is used to operate various motors M1 to M4. Thermal relay contact that activates when the temperature rises abnormally
Connected in series with OL1 to OL4, motors M1 to M
The entire dryer is also stopped when the temperature of any of the dryers increases abnormally. R2 is a paddy jam prevention relay, which is connected in series with the paddy jam detection switch LS installed at the bottom of the elevator, and is activated when paddy jam is detected by the paddy jam detection switch LS to prevent damage to the machine. play a role in preventing R3 is the relay for burner operation, R4
is a relay for maintaining thermostat operation; one end of relay R3 for burner operation is connected to break contact b of thermostat SS, which operates in response to temperature changes in the burner section, and one end of relay R4 for maintaining thermostat operation is connected to break contact b of thermostat SS, which operates in response to temperature changes in the burner section. is connected to the make contact c of
A contact of relay R4 is connected between common contact a and contact c of thermostat SS. R5 is a burner operating relay, R6 is a burner misfire holding relay, and one end of the burner operating relay R5 is connected to break contact b of a misfire detection switch AS that detects a burner misfire, and the burner misfire holding relay R6 One end is connected to the make contact c of the misfire detection switch AS, and the contact of the burner misfire holding relay R6 is connected between the common contact a and the make contact c of the misfire detection switch AS. These relays R1~R6, thermal relay contact OL1~
The circuit consisting of OL4, paddy jam detection switch LS, thermostat SS, and misfire detection switch AS is connected to terminal C4 of connectors 18a and 18m (hereinafter, similar parts will be simply referred to as "terminal C"). , for example, expressed as "terminal C4.")
and the power supply terminal V0. R7 is a burner operating relay, which is connected between the power supply terminal V0 and the terminal C14 of the connectors 18a and 18m.

MC1 to MC4 are electromagnetic switches in the relay circuit section 19, MC1 is an electromagnetic switch that rotates or stops the motor M1 for driving the feeding valve, and MC2 is an electromagnetic switch that rotates or stops the motor M2 that operates the elevator. MC3 is an electromagnetic switch that rotates or stops the motor M3 that operates the fan of the exhaust fan, and MC4 is an electromagnetic switch that rotates or stops the motor M4 that operates the fan of the hot air fan. . These electromagnetic switches
One terminal of MC1 to MC4 is connected to power supply terminal V0, and the other end of MC1 is connected to connectors 18a and 18.
The other end of MC2 is also connected to terminal C8, and the other end of MC3 is also connected to terminal C.
10, and the other end of MC4 is also connected to terminal C1.
Connected to 2.

M0 is an exhaust damper motor capable of forward and reverse rotation for driving the exhaust damper, one electrode of which is connected to the power supply terminal V0, and the three terminals serving as the other electrode are connected to one terminal of a corresponding limit switch. It is connected. Specifically, the terminal that opens the damper and stops it at its open end when it receives a voltage, that is, the open terminal, is connected to one terminal of an open limit switch (open LS), and when it receives a voltage, it opens the damper and stops it at its open end. The terminal that controls the opening, that is, the discharge terminal, is the discharge limit switch (discharge
The terminal, which is connected to one terminal of the closing limit switch (LS) and operates to close the damper when it receives a voltage, that is, the closing terminal, is connected to one terminal of the closing limit switch (closing LS).

The other terminal of the open limit switch (open LS) is connected to terminal C16 of connectors 18a and 18m, and the other terminal of the discharge limit switch (discharge LS) is connected to the damper opening degree changeover switch (damper open position).
The other terminal of the close limit switch (close LS) is connected to the close switch terminal of the damper opening degree changeover switch (damper opening degree SW). The common terminal of the damper opening degree changeover switch (damper opening degree switch SW) is connected to the terminal C18 of the connectors 18a and 18m.

Next, the automatic control signal output section 2 and the manual control operation section 16 will be explained. The power supply circuit of the microcomputer 1 is connected to the terminal C1 of the automatic control connector 18a, and the microcomputer power supply V1 is connected to the terminal C2 of the automatic control connector 18a.
When the automatic control connector 18a is attached to the connector attachment part 20, the power supply V1 is applied to the power supply circuit of the microcomputer 1 via the shorting line SL of the connector 18a. J
0 is the contact point of the full stop relay, the full stop switch
When SW0 is pushed, it is temporarily turned off by the CPU. One terminal of this full stop relay contact J0 is connected to the terminal C3 of the connector, and one terminal of the full stop switch SW0 is connected to the terminal C5 of the connector 18. The other end of the full stop relay contact J0 and the other end of the full stop switch SW0 are each grounded.

In the same manner as above, connect the electromagnetic switches MC1 to MC.
4. One side of relay contacts J1 to J7 for automatically controlling relay R7 and motor M0 is connected to terminals C7, C11, C15, C19, and C of connector 18.
Terminals C7 and C connected to 21, C23 and C24
11, C15, C19, C21, C23, C24
It is also connected to electromagnetic switches MC1 to MC.
One terminal of manual switches SW1 to SW5 for manually operating relay R7 and relay R7 is terminal C9, C13, C17, C20,
Terminals C9, C13, C17 connected to C22,
It is connected to C20 and C22. Then, the other side of relay contacts J1 to J5 and the manual switch
The other terminals of SW1 to SW5 are connected to each other,
The connection point is grounded via the relay contact of the paddy jam prevention relay R2 and the relay contact of the full stop relay R1. Also, relay contacts J6 and J7
The other side of is directly grounded. The open terminal of the manual switch SW7 for controlling the discharge damper is connected to the terminal C25 of the connector 18, and the closed terminal is connected to the terminal C26 of the connector 18.
and the common terminal of manual switch SW7 is directly grounded.

FIG. 4 shows a view of the connector 18 seen from the side opposite to the side where it is attached to the connector attachment section 20.
The lower surfaces of the connector a and the manual control connector 18m are fixed to each other. connector 18
The back side of each of the terminals C1 to C30 in FIG. is the shorting wire SL
It is formed into a pin-shaped protrusion so that it can be soldered. In the automatic control connector 18a, terminals C1 and C2, C3 and C4, C6 and C7, C8 and C11, C10 and C15, and C1
2 and C19, C14 and C21, C16 and C23, and C18 and C24 are each short-circuited to each other by a short-circuit line SL.

In addition, the connector 18m for manual automatic control is terminal C.
4 and C5, C6 and C9, C8 and C13, C10 and C17, C12 and C20,
C14 and C22, C16 and C25, and C18 and C26 are shorted to each other.
Shorted through SL.

Therefore, when the automatic control connector 18a of the connectors 18 is attached to the connector attachment part 20,
Terminals C1 to C30 of the automatic control connector 18a and terminals C1 to C30 of the connector mounting portion 20 having the same number are electrically connected to each other.
Then, the terminals C1 and C2 of the connector mounting section 20 are connected to each other, and the power supply V1 is applied to the power supply circuit of the microcomputer 1. In addition, terminals C4 and C3 are connected, and a circuit consisting of relays R1 to R6, thermal relay contacts OL1 to OL4, paddy jam detection switch LS, etc. is connected to full stop relay contact J0 via terminals C4 and C3. be done. or,
Similarly, electromagnetic switches MC1 to MC4, relay R
7. The open lead switch (open LS) connected to the discharge damper motor M0 and the damper opening switch (damper opening SW) are connected to terminals C6 and C7, C8 and C11, C10 and C15, and C, respectively.
12 and C19, C14 and C21, C16 and C23, and C18 and C24 to the respective relay contacts J1 to J7 for automatic control. Therefore,
At this time the grain dryer goes into automatically controlled mode.

Conversely, if the connector 18 is rotated 180 degrees from the state shown in FIG.
0 and the terminals C1 to C30 of the connector mounting portion 20 having the same number are electrically connected to each other. Then, unlike the previous case, there is no electrical connection between the terminals C1 and C2 of the connector mounting section 20, and the power supply V1 is not applied to the power supply circuit of the microcomputer 1. And terminals C4, C6, C8, C10, C12, C
14, C16 and C18 are terminals C3, C7, C
11, C15, C19, C21, C23 and C2
4, C5, C9,
C13, C17, C20, C22, C25 and C
26, and the relay circuit section 19 becomes connected to the manual switches SW0 to SW7. Therefore, at this time the grain dryer is in a manually controlled mode.

Such, the above grain dryer has connector 20
Mode switching between automatic operation mode and manual operation mode can be reliably performed by simply replacing the connector attached to the controller. When the manual control connector 18m is attached to the connector attachment part 20, the circuit that supplies power V1 to the microcomputer 1 is turned off, so even if the manual operation mode is set, the microcomputer 1 continues, and there is no fear that the malfunction will not end. Furthermore, since the automatic control connector and the manual control connector are fixed to each other, the connectors can be easily replaced for mode switching between the automatic operation mode and the manual operation mode.

As described above, the control device for the grain dryer of the present invention is applicable to a grain dryer having a microcomputer section that outputs various control signals based on signals from various sensors and drives and controls various motors. An automatic control signal output section that inputs signals and outputs various contact signals corresponding to these, a manual control operation section that outputs various contact signals for manual operation, and an automatic control signal output section that outputs various contact signals corresponding to these signals; A connector section for selectively connecting one of the various contact signals from the control signal output section and the manual control operation section to a group of relays for driving the motor, and a connector section for selectively connecting one of the various contact signals from the control signal output section and the manual control operation section, and the micro-connector section for selectively connecting an automatic or manual shot connector. It is characterized by being equipped with a switch section (short circuit line SL) that turns on and off the power line to the computer section, and according to this, mode switching between automatic operation mode and manual mode can be performed using a connector. This can be done reliably through the extremely simple operation of replacing the microcomputer, and the power line to the microcomputer section can be turned on and off when switching modes, completely preventing malfunctions of the microcomputer. can.

[Brief explanation of the drawing]

The drawings are for explaining an example of the implementation of the control device for the grain dryer of the present invention; FIG. 1 is a circuit block diagram showing the overall outline of the control device, FIG. 2 is a front view of the dryer operation panel, FIG. 3 is a circuit diagram of the automatic control signal output section, manual control operation section, and relay circuit section, and FIG. 4 is a rear view of the connector. Explanation of symbols, 1...Microcomputer section,
18a...Connector for automatic control, 18m...Connector for manual control, SW0-SW7...Manual controller, R1-R7, MC1-MC4, _M0 ...Controlled object, _V1 ...Power supply for microcomputer section.

Claims (1)

[Scope of utility model registration request] In a grain dryer that has a microcomputer section that outputs various control signals based on signals from various sensors and drives and controls various motors, automatic control that inputs the various control signals and outputs various contact signals corresponding to these signals. A signal output section, a manual control operation section that outputs contact signals for various manual operations, and a manual control operation section that outputs various contact signals from the automatic control signal output section and manual control operation section by attaching an automatic or manual shot connector. A connector section that selectively connects one side to a relay group for motor drive, and a switch section (shorting line SL) that turns on and off the power line to the microcomputer section in response to the selective connection of automatic or manual short connector )
A control device for a grain dryer, characterized by comprising: