JPH03207985A - Microwave drying control apparatus - Google Patents

Abstract

PURPOSE:To prevent erroneous operation and trouble due to the mistake of the setting and selection by loading a control part with a plurality of the operation programs corresponding to different kinds of microwave dryers and selecting the desired program among them to perform the information related thereto. CONSTITUTION:The operation program corresponding to the kind of a microwave dryer incorporated beforehand by construction is selected by a selection switch 38. When the program is set to A, a control part 36 judges the operation program to be A to judge whether a monitor key 40 is operated and, when the key 40 is operated, the machine kind name AA of the microwave dryer corresponding to the program A is displayed on a display part 39. Therefore, the accurate selection and setting of the operation program is cleared. At the time of non-coincidence, selection and setting is done over again by the selection switch 38. When the operation of the monitor key 40 is released at the time of accurate selection and setting, the control part 36 erases the display of the machine kind name AA on the display part 39 to wait the start key operation of an operation part 37.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a microwave drying control device that is mounted on a microwave drying device and controls the microwave drying device.

(b) Prior art Japanese Patent Application No. 1-47803 discloses that granular or powdery materials to be dried, such as glass-containing resin pellets, are subjected to microwave drying in a drying chamber by a control section consisting of a microcomputer or the like of a microwave drying control device. The precepts to do so have been disclosed. Such a resin pellet y} is shaped after being melted, and if the resin pellet 7} is dried prior to this melt molding, the subsequent shaping can be done well.

By the way, microwave drying devices equipped with the above-mentioned microwave drying control device and performing microwave drying range from small ones with a drying chamber capacity of 7315i class, for example.
There are many models, including large ones of the 4002 class.

Therefore, it is necessary to prepare a large number of the above-mentioned microwave drying control devices in accordance with these models, and this becomes a factor that hinders the improvement of productivity in microwave drying devices.

Therefore, if the control section of the microwave drying control device described above is equipped with multiple operation programs corresponding to different types of microwave drying devices to ensure the versatility of the microwave drying control device, each microwave drying device There is no need to prepare a separate microwave drying control device corresponding to the above, and the productivity of the microwave drying device is improved.

However, in this case, if the operating program corresponding to the model of the microwave drying device is not selected and set correctly, the microwave drying device may malfunction or break down.

(c) Problems to be Solved by the Invention The present invention solves the problem that a microwave drying device controlled by a microwave drying control device that ensures versatility may malfunction or fail due to incorrect selection and setting of the operating program. (It's something to rub.)

(2) Means for Solving the Problems The present invention provides a microwave drying control device having a control unit for microwave drying a granular or powdery material to be dried in a drying chamber. Equipped with multiple operation programs compatible with microwave drying equipment, and
The present invention is characterized by comprising a selecting means for selecting a desired driving program from among the plurality of driving programs, and a notifying means for notifying the driving program selected by the selecting means.

(E) Function When a microwave drying control device having a control section equipped with multiple operation programs/programs corresponding to different types of microwave drying devices is incorporated into a certain microwave drying device, this microwave An operation program suitable for the drying device is selected by the selection means. In this case, the notification means provides notification regarding the selected driving program, making it possible to select and set the correct driving program without fail.

(f) Embodiment FIG. 1 shows the structure of a microwave drying device incorporating a microwave drying control device according to an embodiment of the present invention, and the device consists of a main body 1 of the drying device and peripheral mechanisms thereof.

The main body 1 of the drying apparatus is provided with a cylindrical drying chamber 3 having an upper M2 that can be opened and closed as a main part. A supply pipe 4 is connected to the upper left part of the drying chamber, and the tip of the supply pipe is connected to a storage l' for storing granular or powdery material 5 to be dried.
It has reached within l6.

The storage tank is located below the drying chamber 3. Examples of the material to be dried 5 include glass-containing resin pellets, rice, and powdered pharmaceutical products. Street fat pellets are shaped after being melted, and if the resin pellets are dried prior to melting and shaping, subsequent shaping will be better. In this example, glass-containing resin pellets are the material to be dried.

A suction hopper 7 is connected to the center of the upper lid 2 of the drying chamber 3, and a filter wire mesh 8a and a filter paper 8 are removably arranged in the suction hopper 7. The filter wire mesh 8a and the filter paper 8 have a mesh smaller than the material diameter of the material to be dried 5, and the filter paper 8 has a mesh smaller than the filter wire mesh 8a.

A povet valve 9 is provided in the impeller 7 above the filter wire mesh 8a and the filter paper 8,
In addition, a suction blower 11 is connected to the suction port 7 above the poppet valve 9 via an intake vibrator 1o. In this case, when the suction blower 1l is driven with the poppet valve 9 driven open, the suction action of the suction blower 11 extends to the suction pipe 10, the suction filter 7, and the microwave cutoff pipe 4, and the inside of the storage tank 6 is The material to be dried 5 is suctioned and passes through the supply pipe 4 to the drying chamber 3. When the material to be dried 5 reaches the drying chamber 3, it falls and accumulates inside the drying chamber due to its own weight.

Here, some of the objects 5 to be dried do not fall into the drying chamber 3 but are subsequently drawn up and into the suction hopper 7, but such objects 5 to be dried do not fall into the drying chamber 3, but from now on, such objects 5 are passed through the filter wire mesh 8a and the filter. The paper 8 prevents the drying material 5 from being drawn in undesirably toward the suction blower 11.

In the drying chamber 3, there is a magnetron l2 inside.
Microwaves are supplied from the dryer via a waveguide 13, and an agitator 15 driven by a motor 14 to agitate the material to be dried 5 is provided on the bottom wall.

A level sensor l6 and a temperature sensor 17 are provided on the side wall to detect whether a predetermined amount of the material to be dried 5 has accumulated in the drying chamber 3.
is located. Further, a compressor 19 is connected to the left bottom portion via an intake valve 18, and an exhaust valve 2o is provided on the upper lid 2 of the drying chamber 3.

The dried material accumulates in the drying chamber 3 as described above! Ik5
is stirred by the agitator 15 so that its upper surface is aligned with the horizontal plane, and in this state, the level sensor 16 detects the amount of the material to be dried 5 fed into the drying chamber 3, and this amount of supply is detected by the level sensor 16. When the predetermined amount is reached, the stirring by the stirring body 15 is continued and the magnetron 12 is driven and controlled to microwave dry the material 5 to be dried. At this time, the magnetron 12 is driven and controlled so that the temperature of the material to be dried 5 detected by the temperature sensor 17 is maintained at a desired temperature. Furthermore, the compressor 19 is driven, and the intake valve 18 and the exhaust valve 2o are opened, and the water vapor generated when the material to be dried 5 is dried by microwaves is discharged from the compressor 19 to the outside through the exhaust valve 20 along with the air. Ru.

Further, a discharge valve 2l is provided at the bottom right of the drying chamber 3, and the discharge valve is opened when the dried material 5 is discharged. The material to be dried 5 discharged upon opening of the wander valve 2l falls through the discharge pipe 22 into the preliminary chamber 23 below and accumulates therein. A heat-retaining heater 24 is disposed on the lower inclined wall of the pre-chamber, and the heat-retaining heater prevents the material to be dried 5 accumulated in the pre-chamber 23 from cooling down. In addition, the preliminary chamber 23 includes a level sensor 26 having a rotating body 25.
is provided. Such a level sensor 26 normally rotates the rotary body 25, and even if a small predetermined amount of the dried material 5 accumulates in the preliminary chamber 23 and the rotary body 25 is attempted to be rotated, the dried material 3 does not become a load. When the rotating body 25 cannot be rotated satisfactorily, a predetermined signal is output to detect that a small predetermined amount of the material to be dried 5 has accumulated.

The lower part of the preliminary chamber 23 is connected to another suction hopper 27 located higher than the preliminary chamber 23 through a conveying pipe 28. Similar to the suction hopper 7, the suction hopper 27 is also provided with a filter wire mesh 29a and a filter paper 29 having a mesh smaller than the material diameter of the material to be dried 5.
Moreover, a boppet valve 3o is provided above the filter paper. The suction blower 11 is also connected to the suction hopper 27 via an intake pipe 31 above the boppet valve 3o. In this case, when the blower 1l is driven with the poppet valve 3o open, the suction action of the blower 1l extends to the conveying pipe 2& via the suction pipe 31 and the suction hopper 27, and the waste accumulated in the preliminary chamber 23 is removed. The dried material 5 passes through the conveying pipe 28 and reaches the suction hopper 27 . The material to be dried 5 is placed in this suction hopper 2.
7, it falls into the hopper due to its own weight.

A heat retention heater 32 is arranged on the lower inclined wall of the suction hopper 27 for the same purpose as the heat retention heater 24,
An on-off valve 33 is provided at the lower end, and upper and lower limit level sensors 34 and 35 are arranged at the upper and lower parts.

When the on-off valve 33 is closed, the suction action moves and the dried material 5 falls into the suction hopper 27, and the dried material 5 accumulates in the suction hopper 27. On the other hand, when the on-off valve 33 is opened, this The dried material 5 accumulated in this manner falls downward and reaches the next processing section, where the dried material 5 is dried.
! J5, that is, the resin pellets are melted into a shape.

FIG. 2 shows a circuit of a microwave drying control device according to an embodiment of the present invention incorporated in such a microwave drying device, and the main control section 36 is a microcomputer manufactured by Sanyo Electric Co., Ltd., product number LC-65PG23. It is provided. The control unit is mounted on a programmable board (not shown), and is equipped with three operating programs A, B, and C corresponding to three types of microwave drying devices with different capacities of the drying chamber 3. There is. The control section 36 receives operation information from an operation section 37 disposed on the front surface of the drying apparatus main body 1, and receives operation information from the operation program A that is installed on or near a printed circuit board on which the control section 36 is configured. ．． Selection switch 38 for selecting a desired operation program from B and C
selection information from, temperature information from the temperature sensor 17,
Based on the information from the various level sensors 16, 26, 34, and 35, the seven Danetrons 12, the motor 14, the intake valve 18, the exhaust valve 20, the compressor 19, the exhaust valve 2l, the heat insulating heaters 24, 32, The suction blower 11, the poppet valves 9 and 30, the on-off valve 33, and the notification means, that is, the display section 39 near the operation section 37 are driven and controlled.

FIG. 3 shows a flowchart of the control program installed in the control section 36, and the operation of the microwave drying apparatus will be explained below along the same chart.

First, at a factory or the like, an operation program corresponding to the model of the microwave drying apparatus into which the microwave drying control device consisting of the control section 36 and the like is installed is installed on the selection switch 38.
selected by. In this case, it is assumed that operation program A is selected.

Then, as the microwave drying device is powered on, the control section 36 executes step S1 to clear all the writable areas inside the white meat. Next, the control section 3
Step 6 executes the S2 step and determines whether the selected operation program is A or not. In this case, since the operating program is A, the control section 36 then uses the S3 steno knob to determine whether or not the monitor key 40 (located in the operation section 37) is operated. When the monitor key 40 is operated, the control section 36 displays the model name AA of the microwave drying apparatus corresponding to the selected operation program A on the display section 39 in step S4. If the model name displayed in this way matches the actual model name of the microwave drying apparatus incorporating the microwave drying control device, it can be seen that the operating program has been selected and set correctly. On the other hand, if the displayed model name does not match the actual model name, it is known that the operating program has been selected and set in error, and the operating program can be selected and set again using the selection switch 38.

Now, when it is found that the operating program is correctly set and the monitor key 40 is released, the control section 36 cancels the display of the model name AA on the display section 39 in step S5, and proceeds to step S6. and waits for the start key to be operated on the operation section 37.

Then, when the start key is operated on the operation unit 37 (this start key operation judgment remains until the power is turned off),
The control unit 36 executes step S7. That is, model AA
According to the operation program A corresponding to 23
The magnetron 12 and the like are driven and controlled in order to carry out a series of operations for carrying out the dried material 5 to the empty suction hopper 27 and discharging the dried material 5 from the suction hopper 27 to the next stage processing section. When this series of operations is completed, the control unit 36 determines this in step S8, and after going through steps S2 to S5, since the start key operation remains to be determined, step S7 is executed again. In this way, the control unit 36 repeatedly executes a series of operations according to the operation program A unless the power is shut off.

Next, assuming that the operating program selected and set in advance at a factory or the like is B, the control unit 36 executes steps S2 to S9, and then executes steps 510 to 515 as appropriate. At this time, the control unit 36 controls the monitor key 4
Operation program B selected based on the operation of 0
The model name BB of the microwave drying device corresponding to the above is displayed on the display section 39. The model name displayed in this way is
If it matches the actual model name of the microwave drying device incorporating the microwave drying control device, it can be seen that the operating program has been selected and set correctly. In addition, the control unit 3
6 repeatedly executes a series of operations according to operation alogram B.

Further, assuming that the operating program selected and set at the factory or the like is C, the control unit 36 executes steps S2 to S9, 316 steps, and then steps 517 to S21 as appropriate. At this time, the control section 36 displays the model name CC of the microwave drying apparatus corresponding to the selected operation program C on the display section 39 based on the operation of the monitor key 40. If the model name displayed in this manner matches the actual model name of the microwave drying apparatus incorporating the microwave drying control device, it can be seen that the operating program has been selected and set correctly. Further, the control unit 36 repeatedly executes a series of operations according to the operation program C.

Here, since steps S10 to S15 and steps 517 to S21 conform to steps S3 to S8 described above, detailed explanations will be omitted.

(G) Effects of the Invention According to the microwave drying control device of the present invention, the control unit is equipped with a plurality of operation programs corresponding to different types of microwave drying devices, so it is versatile and Notification regarding the operating program selected from among them is performed by the informing means, making it possible to select and set the correct operating program without fail, and making it possible to prevent malfunctions or breakdowns of the microwave drying apparatus.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a microwave drying device incorporating a microwave drying control device according to an embodiment of the present invention, Fig. 2 is a circuit diagram of a microwave drying control device according to an embodiment of the present invention, and Fig. 3 is a similar control diagram. 7 is a flowchart of a control program installed in the control section of the device. 3... Drying chamber, 36... Control section, 38... Selection switch, 39... Display section.

Claims (1)

[Claims] (1) In a microwave drying control device having a control section for microwave drying granular or powdery materials to be dried in a drying chamber, the control section has multiple operating programs corresponding to different types of microwave drying devices. and a selection means for selecting a desired driving program from among the plurality of driving programs, and a notification means for giving a notification regarding the driving program selected by the selection means. Microwave drying control device.