JPH08168730A - Flowing water type ultrasonic washing apparatus - Google Patents

Abstract

PURPOSE: To always perform safe washing by judging that a material to be washed is the one unfit for ultrasonic washing. CONSTITUTION: A receiver 7 for detecting reflection of ultrasonic waves given to a washing surface S by ultrasonic washing is installed, and the reflection is compared with a reference reflection level given as data. When it is less than the reference, a material to be washed is recognized as an abnormal object to stop ultrasonic wave transmission. After the abnormal object is detected, an ultrasonic transmitter 6 is operated with prescribed timing to check the washing surface S, and when normalized, ultrasonic washing is done again. As the other means without a receiver 7 being added, the output wave form of the transmitter 6 varied with materials of the washing surface S is used to determine if washing is done.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running water type ultrasonic cleaning apparatus of a type for applying ultrasonic energy to a fluid supplied from a water source and discharging the ultrasonic cleaning water to an object to be cleaned. In particular, the present invention relates to a device provided with a safety device that stops cleaning when an object to be cleaned that is not suitable for ultrasonic cleaning is detected.

[0002]

2. Description of the Related Art A conventional device of this type is disclosed in Japanese Patent Laid-Open No.
As shown in No. 60677, an ultrasonic vibrator is provided in the cleaning water supply path, and ultrasonic vibration is propagated to the cleaning water itself so that the object to be cleaned is not moved, from large ones to fixed ones. A flowing water type ultrasonic cleaning device capable of cleaning is known. According to such a device,
Since the cleaning device itself can be moved in a portable manner, it can be applied to cleaning automobiles, for example, and its application range is greatly expanded.

[0003]

However, ultrasonic cleaning may or may not be usable depending on the material of the cleaning object. For example, when it is used for cleaning rubber or the like, it absorbs ultrasonic energy from the cleaning surface. There is a risk that the rubber will elute due to the friction. This is the same for the human body, and there are many safety issues to be solved in realizing such a cleaning device. Therefore, an object of the present invention is to provide an ultrasonic cleaning device that enables the material of the cleaning surface to be discriminated and realizes safe cleaning.

[0004]

In order to solve such a problem, the present invention provides a method of applying ultrasonic cleaning water to a cleaning surface,
When the cleaning surface is made of rubber or the like, attention is paid to the fact that the reflected ultrasonic wave level is small, and as a first means, a detection means for detecting this reflection level and a reflection level detected by the detection means. Is compared with the reference value level, and when the reflection level is below the reference value level, the ultrasonic wave generating means is stopped.

As a second means, a detecting means for detecting the reflection level and the reflection level detected by the detecting means are compared with a reference value level, and when the reflection level falls below the reference value level, The sound wave generating means is intermittently operated at a predetermined timing, and when the abnormality of the reflection level is avoided, the control means is switched to the continuous operation.

Further, paying attention to the fact that the reflected ultrasonic wave level changes the output waveform of the oscillator when the ultrasonic cleaning water is applied to the cleaning surface. The oscillation output waveform of the sound wave generating means and the oscillation output waveform of the ultrasonic wave generating means in the cleaning state are compared, and a control means for stopping the ultrasonic wave generating means when the amount of change is lower than a predetermined value is provided. is there.

As a fourth means, the oscillation output waveform of the ultrasonic wave generating means at the time of cleaning is compared with the oscillation output waveform of the ultrasonic wave generating means at the time of cleaning, and the change amount is below a predetermined value. At this time, the ultrasonic wave generating means is intermittently operated at a predetermined timing, and the control means is switched to the continuous operation when the abnormality of the reflection level is avoided.

[0008]

In the present invention as described above, according to the first means, when the ultrasonic cleaning water is discharged to the object to be cleaned, the reflection level of the ultrasonic waves reflected by the object to be cleaned is detected. Determines whether the cleaning surface is not suitable for ultrasonic waves, and when the reflection level is lower than the reference value, automatically stops the ultrasonic wave generation means and stops ultrasonic cleaning. Is.

According to the second means, in addition to the above structure, when the cleaning surface is made of a material that is not suitable for ultrasonic waves, the ultrasonic wave generating means is switched to intermittent operation at a predetermined timing to convert the cleaning water into cleaning water. Instead of applying ultrasonic vibration, it functions as a sensor that constantly monitors the level of reflection from the cleaning surface, and if it is determined that the cleaning surface is a material that can be ultrasonically cleaned, the ultrasonic wave generation means operates continuously again. Then, it acts so as to supply ultrasonic cleaning water.

Further, according to the third and fourth means, the intensity of the reflection from the cleaning surface is detected by monitoring the output waveform of the oscillator, and when the disturbance of the output waveform due to this reflection is below a predetermined value. Judges that the cleaned surface is a material that cannot be ultrasonically cleaned.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a flowing water type ultrasonic cleaning apparatus of the present invention. A nozzle casing 1 has a water inlet 2 on the primary side and a discharge port 3 on the secondary side. Four
Is an on-off valve, which is provided in a water supply passage that connects the water inlet 2 of the casing 1 and a water source. Reference numeral 5 denotes an ultrasonic vibrator, which is submerged in the inner surface of the casing 1 facing the discharge port 3 and is driven by the ultrasonic transmitter 6. As a result, ultrasonic vibrations are propagated to the cleaning water introduced into the casing 1 from the water inlet 2 as the opening / closing valve 4 is opened, and the outlet 3
Is applied as ultrasonic cleaning water to the surface F to be cleaned, and cleaning is performed with a strong cleaning power.

Reference numeral 7 denotes an ultrasonic wave receiver for receiving a reflected wave in which the ultrasonic wave generated by the ultrasonic vibrator 5 hits the surface F to be cleaned and is reflected. There is. This is to detect the level of the reflected wave required to detect whether or not the surface F to be cleaned is a material that can be cleaned with ultrasonic cleaning water, and transmit it to the control unit 8.

The control unit 8 is provided with a ROM 9 in which the reference value of the reflection level is stored, receives the reflection level transmitted from the ultrasonic receiver 7, reads the reference value from the ROM 9 and compares the two with each other to wash the cleaning surface. In addition to judging S,
The ultrasonic transmitter 6 and the on-off valve 4 are driven. When the control unit 8 determines that the reflection level obtained by the receiver 7 is lower than the reference value, the control unit 8 determines that the material is not suitable for ultrasonic cleaning, such as rubber, and stops the ultrasonic transmitter 6. It operates so as to avoid danger occurrence in advance. The reference value of the reflection level stored in the ROM 9 is the maximum reflection level L obtained with a material such as rubber.
It is set in the range of L <L ₁ with ₁ as a reference, and these values are given based on experimental values.

Next, as the operation of the control section 8, an operation mode different from the operation of stopping the ultrasonic wave transmission when the value falls below the reference value will be described with reference to the flowchart of FIG. First, when cleaning starts, the on-off valve 4 is opened (1), and an ultrasonic wave output command is given to the ultrasonic wave transmitter 6 (2). When the ultrasonic cleaning water thus generated hits the surface F to be cleaned and the reflection level of the reflected ultrasonic waves is transmitted from the receiver 7.
(3) Read the reference value from ROM9 and compare both
(4). Here, if the reflection level is within the reference value, the process proceeds to step (3), and this detection is repeated until the cleaning is completed.
(5) When the cleaning is completed, the ultrasonic wave output is stopped (6), and the on-off valve 4 is closed to complete (7).

When a reflection level lower than the reference value is detected in step (4), it is determined that the material is not suitable for ultrasonic cleaning, such as rubber, and the ultrasonic transmitter 6 is temporarily stopped.
(8). Next, after confirming whether or not the cleaning is completed (9), a predetermined interval is provided (10), the process proceeds to step (2), and the reflection level of the reflection level is again determined based on steps (2) to (4). Check. If it is determined here that ultrasonic cleaning is possible, ultrasonic output is continued and cleaning with ultrasonic cleaning water is performed.

In the above embodiment, the receiver for detecting the reflection of the ultrasonic wave and the transmitter for outputting the ultrasonic wave are separately provided. However, if the material is discriminated by the strength of the reflection, only the transmitter is required. It is possible to configure. In this case, the ultrasonic waves reflected on the cleaning surface change the output waveform of the transmitter. This will be described with reference to FIG. The description of the same parts as those in FIG. 1 will be omitted.

The control unit 8 takes in the output waveform of the ultrasonic transmitter 6, compares it with a standard waveform as a reference, and transmits it.
Comparing section 10 for extracting noise of output waveform, and comparing section 1
The determination unit 11 determines the material of the cleaning surface from the peak value of noise extracted from 0. Here, the comparison unit 10
The standard waveform to be compared with is the output waveform of the transmitter 6 when the cleaning water is not applied to the cleaning surface and is written in the memory 12 as an initial setting.

Next, the material determination operation in this embodiment will be described in more detail. When the cleaning is started, the output waveform of the transmitter 6 is sampled at a predetermined timing and compared with the standard waveform written in the memory 12 each time. Here, when the cleaning surface is an iron plate such as an automobile body, the output waveform of the transmitter 6 changes greatly due to the large amount of reflection and the influence of the reflected wave. The noise part changed by the reflected wave is extracted by comparing

On the other hand, when the cleaning surface is made of a material such as rubber, ultrasonic energy is absorbed, so there is almost no reflection from the cleaning surface, and the output waveform and the standard waveform are very different. There will be no.

The strength of the extracted noise waveform is determined by the determination unit 11 based on the threshold value. When the peak value is high, it is detected as an iron plate, and when it is low, it is detected as rubber. As described above, the material of the cleaning surface being cleaned can be recognized by monitoring the output waveform of the transmitter 6, which can be implemented without providing a separate receiver.

[0018]

The present invention is constructed as described above, and compares the reflection level detected by the detection means for detecting the reflection level from the object to be cleaned with the reference value level, and the reflection level becomes the reference value. When the value falls below the value level, the control means to stop the ultrasonic wave generation means is provided, so even if the ultrasonic cleaning water is discharged to the material such as rubber that cannot be ultrasonically cleaned, the ultrasonic wave is automatically generated. Only vibration can be stopped to avoid danger.

As a second means, the ultrasonic wave generating means is intermittently operated at a predetermined timing when an abnormality in the reflection level is recognized, and the control means is switched to a continuous operation when the abnormality in the reflection level is avoided. Therefore, it is very effective when the material to be cleaned is a combination of a plurality of materials in a piecewise manner.

Further, as the third and fourth means, the oscillation output waveform of the ultrasonic wave generating means at the time of cleaning is compared with the oscillation output waveform of the ultrasonic wave generating means at the time of cleaning, and the change of the cleaning surface Material can be detected,
It is not necessary to separately provide a receiver, the cost can be reduced due to the reduction of the number of parts, and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a running water type ultrasonic cleaning apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a second operation of the same device.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.

[Explanation of symbols]

 1 Nozzle casing 5 Ultrasonic transducer 6 Ultrasonic transmitter 7 Ultrasonic receiver 8 Control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuharu Aoyagi 1825 Amemiya, Aramiya, Sarahima City, Nagano MK Seiko Co., Ltd.

Claims (4)

[Claims] 1. A casing communicating with a water source is provided with ultrasonic wave generating means, ultrasonic vibration is applied to a fluid supplied from the water source to generate ultrasonic cleaning water, and the cleaning water is discharged toward an object to be cleaned. In a cleaning device of a type that aims at cleaning by doing so, the detection means for detecting the reflection level from the object to be cleaned and the reflection level detected by the detection means are compared with a reference value level, and the reflection level is compared with the reference value level. A flowing water type ultrasonic cleaning device comprising a control means for stopping the ultrasonic wave generation means when the temperature falls below the lower limit. 2. A casing communicating with a water source is provided with ultrasonic wave generating means, ultrasonic vibration is applied to a fluid supplied from the water source to generate ultrasonic cleaning water, and the cleaning water is discharged toward an object to be cleaned. In a cleaning device of a type that aims at cleaning by doing so, the detection means for detecting the reflection level from the object to be cleaned and the reflection level detected by the detection means are compared with a reference value level, and the reflection level is compared with the reference value level. A flowing water type ultrasonic cleaning apparatus, comprising: a control means for intermittently operating the ultrasonic wave generating means at a predetermined timing when the temperature falls below and switching to continuous operation when an abnormality in the reflection level is avoided. 3. A casing communicating with a water source is provided with an ultrasonic wave generating means, ultrasonic vibration is applied to a fluid supplied from the water source to generate ultrasonic cleaning water, and the cleaning water is discharged toward an object to be cleaned. In the cleaning apparatus of the type that aims at cleaning by doing so, the oscillation output waveform of the ultrasonic wave generating means during cleaning is compared with the oscillation output waveform of the ultrasonic wave generating means in the non-cleaning state, and the change amount is below a predetermined value. A flowing water type ultrasonic cleaning device, which is provided with a control means for stopping the ultrasonic wave generation means at a time. 4. An ultrasonic wave generating means is provided in a casing communicating with a water source, ultrasonic vibration is applied to a fluid supplied from the water source to generate ultrasonic cleaning water, and the cleaning water is discharged toward an object to be cleaned. In the cleaning apparatus of the type that aims at cleaning by doing so, the oscillation output waveform of the ultrasonic wave generating means during cleaning is compared with the oscillation output waveform of the ultrasonic wave generating means in the non-cleaning state, and the change amount is below a predetermined value. The flowing water type ultrasonic cleaning apparatus is characterized in that the ultrasonic wave generating means is intermittently operated at a predetermined timing and switches to a continuous operation when an abnormality in the reflection level is avoided.