JPS60126196A - Dehydrator - 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 (Technical Field) The present invention relates to a dehydrator, and particularly to automatic control thereof.

(Prior art) Conventionally, dehydrators have been controlled by timers, but since these timers were set based on the user's intuition and experience, problems such as over- or under-dehydration and fabric damage due to dehydration occurred. there were.

゛ (Objective) The present invention electrically detects the collision of water droplets of dehydration liquid squeezed out of cloth subjected to dehydration with a dehydration sensor, and automatically controls the dehydration operation based on the result. This has made it possible to eliminate the drawbacks of the previous model, and in particular, the dehydration sensor has been set at a position where the most stable output can be obtained, ensuring that the desired purpose can be achieved.

(Example) Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing the main parts of the dehydration sensor, and FIG. 2 is the same side view, showing a ceramic piezoelectric element 12 (hereinafter referred to as a piezoelectric element. Electrodes are formed on both sides of the piezoelectric element 12), A metal diaphragm 11 that is electrically connected to and connected to one electrode surface of the piezoelectric element 12, and an electrode terminal 18.14.
The entire appearance of the dehydration sensor 10 is shown in Figure 3.
is an electrically insulating case. 17a~(Required for 1 hole) Figure 4 is a sectional view taken along line A-A of Figure 3, and shows that the piezoelectric element 12 and metal diaphragm 11 shown in Figure 1 are connected to the electrically insulating case 16. This is a circular projection provided on the 015ai4 case, which is shown in a state where it is fixed so that it can vibrate by and 15.

FIG. 5 is a cross-sectional view of the main part when the dehydration sensor 10 is installed in a dehydrator, in which 1 is a crosspiece frame, and a motor 2 drives the dehydration tank 5 via a buffer (for example, a spring) 4 on the crosspiece frame 1. The O dehydration tank 5 in which the O dehydration tank 5 is installed is connected to the motor 2 through a shaft 3. Reference numeral 6 is a water receiving tank located on the outer periphery of the dewatering tank 5 for receiving the dehydrated liquid, and a drain pipe 7 is connected to a part of the bottom of the tank. The dehydration tank 5 has an appropriate number of holes 8a to 8g through which the dehydration liquid passes. The dehydration sensor 10 is located in the hole 8a, 8b, 8C or 1d8 made at the bottom of the dehydration tank 5.
It is provided so as to face d, etc.

FIG. 6 is an enlarged sectional view of the main part showing the state in which the dehydration sensor 0 is attached. Case I5 of dehydration sensor 10 is water tank 6
In the shape that covers the whole of the whole, there is a hole in the
It is closely fixed to the water receiving tank 6 by screws 19 and nuts 20. Case I5 protrusion 15 aid packing 18
It's digging into a.

18b is also Patsukin. The arrows indicate where the water droplets collide.

FIG. 7 is a diagram showing the positional relationship between the dehydration tank 5 and the dehydration sensor 10. Figure 8 is a block diagram of the main parts of the electronic control circuit that controls the dehydration process.Detection! 21 is an amplifier circuit 22 that amplifies the output voltage of the dehydration sensor 10, and in order to eliminate the small output voltage from the dehydration sensor 10, it is compared with a constant voltage and is provided to output only when the voltage is higher than the constant voltage. Comparison circuit 2
3, a peak value hold circuit 24 which generates an output that is discharged in a longer time when there is an output (one output is for a short time) via the comparator circuit 23, (!: full output of L signal) The comparator circuit 25 outputs an H signal when the output is below a certain voltage.

In FIG. 8, reference numeral 26 denotes a start switch for starting the dehydration process, and a controller composed of a microcomputer 10011-1. The basic configuration of the controller 100 and its relationship with external circuits are shown in FIG.

+01jcPU, l02H program/fixed data memory ROM, +03 temporary storage memory RAM, l04
tri timer, 105HI 10 parts (input/output part). 27 A drive circuit that turns the motor 2't ON and OFF by the output of the rfi controller 100. In Fig. 8, a relay is assumed in the drive circuit, and its contacts are connected to 33
It is said that 30.82 is the winding of motor 2, and 31 is a capacitor.

FIG. 10(a) shows a model of the output waveform of the amplifier circuit 22, and FIG. 10(b) shows an output model of the comparator circuit 25 corresponding to FIG. 10(a). be. This output model shows the state when the 2 kr' of rice flour cloth shown in FIG. 11 is dehydrated, and the position of the dehydration sensor 10 at this time is the position shown in FIG. 7. Figure 10(a)
'e Corresponding to Fig. 11, the rotation speed of the motor 2 gradually increases when dehydration starts (0 seconds), and the water droplets of the dehydration liquid are transferred to the dehydration tank 5.
The cloth flies out and collides with the dehydration sensor 10 for about 8 seconds (this time varies depending on the type and amount of cloth, etc.).

), large outputs can be obtained one after another at short intervals, but about 4
After 0 seconds (this time also varies depending on the type of cloth, amount, etc.), the change in the dehydration rate suddenly becomes smaller. That is, the amount of dehydration decreases rapidly, and the number of water droplets that collide with the dehydration sensor IO decreases and becomes small, resulting in a small output. On the other hand, as shown in FIG. 10(b), the output of the comparator circuit 25 is initially H, but becomes L for 8 to 40 seconds.
After 40 seconds, it becomes H again.

Note that point u at about 40 seconds above is the point where the dehydration rate changes from rapid to slow, and experiments have shown that several times (for example, 5 times) this time is required to actually cut the water. It is being

Next, an example of control of the dewatering operation will be explained according to the flowchart of FIG. 12. First, start switch 26k
Turn on. Turn on the star l switch 26 with the L input of I1
When confirmed, the output of 01 is set to H, the motor 2 is driven via the drive circuit 27, and then the timer 104 is started. When the timer data T becomes T≧10 seconds (meaning that the signal is not seen for 10 seconds), the detection unit 21
Determine if the input (input signal is H or I-) is I2=, and if it is not I2-L, wait for 40 seconds, and if it does not become L during that time, there is something wrong (for example, no cloth is inserted, motor is not rotating normally) [7] Stop motor 2 and set timer 104
Clear stop and timer data. On the other hand, 40
If it does not reach seconds and becomes I2-L, wait until l2=H next time, and if it becomes I2-H, read the timer data Ti (the timer data at this time is T) 0 This T1
The dehydration completion time I2 (T2=T1×5) is calculated from.

Next, determine whether the timer data T is T≧T2, and
If ≧T2, the dehydration is completed, so the output iL is set to 01, the motor 2 is stopped via the drive circuit 27, the timer 104e is stopped, and the timer data is cleared. In this way, the dehydration operation is automatically controlled. Therefore, it is possible to perform proper dehydration without causing problems such as excessive dehydration or insufficient dehydration or staining of cloth due to excessive dehydration, which occurs when relying on the user's intuition and experience as in the past. Next, the position of the dehydration sensor 10 will be described in detail.

In the above embodiment, as shown in FIG.
0 is installed so that the collision surface is perpendicular to the center line
The output of the dehydration sensor 10 is always stable, and the amplifier circuit 22 can obtain a sufficient output as shown in FIG. 10(a). Also, the dehydration sensor IO is the 13th
As shown in the figure, even if the impact surface is perpendicular to the tangent y of the nuclide 5 in the direction of rotation of the dehydration tank 5, the impact force of the water droplets is strong and the probability of impact is high, so A stable output could be obtained, and the same results as in the above example were obtained. As can be seen from the examples in FIGS. 7 and 13, the dehydration sensor IO is located in the range surrounded by the center line X and the tangent y in FIG.
If installed between the two positions, stable output can be obtained.

In short, the dehydration sensor 10 detects the dehydration tank 5 parallel to the center line
A line (
The collision surface may be installed so as to be substantially orthogonal to any one of the lines t) shown in FIG. 14. If the collision surface is not orthogonal to any of these lines, for example, the 16th line
If the dehydration sensor 10 (5) is installed in the position shown in the figure, the impact force of the water droplets will be weak and the rate of contact with the water droplets will be low, making it impossible to obtain sufficient output as shown in Fig. 17. 17(a) shows the output model of the amplifier circuit 22, and FIG. 17(b) shows the output model of the comparator circuit 25 in correspondence with FIG. 17(a). The model shows the state when 2 kg of ramen cloth is dehydrated as shown in Fig. 11.In this way, when the dehydration sensor 10 is installed in the position shown in Fig. 16, 2 kg of ramen cloth is dehydrated.
Despite dehydrating kg, the output in Fig. 17(a) is constantly lower than the comparison level, and Fig. 17(b)
The signal remains at H, and the dehydration completion signal is immediately issued and the dehydration operation is stopped, making it impossible to achieve the intended purpose.

In addition, FIG. 15 shows the water receiving tank 6 having a cylindrical shape.
In such a water receiving tank 6, the collision surface can be made perpendicular to the center line X no matter where the dehydration sensor 10 is attached. However, it is preferable that the mounting part of the dehydration sensor 10 be made flat from the water leakage prevention surface. By electrically detecting collisions with the sensor and automatically controlling the dewatering operation based on the results, the previous drawbacks can be overcome, and by installing the dehydration sensor in a position where stable output can be obtained. It is possible to achieve the intended purpose without fail.

[Brief explanation of the drawing]

1 to 15 show embodiments of the present invention, FIGS. 1 and 2 are front and side views showing the main parts of the dehydration sensor, FIG. 3 is a front view of the dehydration sensor, and FIG. 4 is a sectional view taken along line A-A' in Fig. 3, Fig. 5 is a schematic cross-sectional configuration diagram of a dehydrator equipped with a dehydration sensor, Fig. 6 is a sectional view showing the state in which the dehydration sensor is installed, and Fig. 7 is a cross-sectional view of the dehydration sensor. The installation diagram shows the position, Figure 8 is a block diagram of the main parts of the electronic control circuit, and Figure 9
The figure shows the relationship between the controller and external circuit, Figure 10 (a) and (b) are output waveform diagrams of each part, Figure 11 is a diagram showing temporal changes in dehydration rate, Figure 12 is a dehydration control flowchart, FIGS. 13 to 15 are views showing the other side of the mounting position of the dehydration sensor. 16 and 17 are diagrams for comparatively explaining the present invention. FIG. 16 is a diagram showing the mounting position of the dehydration sensor, and FIG. 17 is an output waveform diagram of each part. 5: Dehydration tank, 10: Dehydration sensor. Agent Patent Attorney Aihiko Fuku (2 others) Figure 1 Figure 3 Figure 2 Figure 4 Series 6 Figure 9 Figure 10 (b) Figure 1I Figure 13

Claims (1)

[Claims] 1. In a dehydrator equipped with a dehydration sensor that generates an electrical signal due to collision of dehydration liquid and a control means that automatically controls the dehydration operation based on the electrical signal from the sensor, the rotation center of the dehydration tank A center line that extends more radially, a tangent to the dehydration tank that runs in the rotation direction of the dehydration tank, or a line that is parallel to the center line and inside the outer circumference of the dehydration tank and runs in the rotation direction of the dehydration tank. On the other hand, a dehydrator is characterized in that the dehydration sensor is installed so that the collision surfaces are substantially perpendicular to each other.