JPS61259793A - Ultrasonic washer - 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 (Industrial Field of Application) [Object of the Invention] The present invention relates to an ultrasonic cleaning device that performs cleaning using ultrasonic vibration.

(Prior art) This type of conventional equipment has a cleaning tank A, as shown in Fig.
The radiant plate B, which is the bottom plate, is made of metal such as stainless steel, titanium alloy, Hastelloy, tantalum, etc.
Ultrasonic waves were irradiated by gluing together a large number of ultrasonic transducers C, C, -- made of different materials such as ZT and ferrite.

In addition, as shown in the figure, when using a chemical solution that corrodes metal, a so-called two-electronic system is used in which a chemical solution tank E is provided separately and the chemical solution tank E is inserted into the water F of the cleaning tank A. A tank was used.

(Problems to be Solved by the Invention) In the former case, the ultrasonic vibrator C may fall off due to differences in adhesive strength or expansion coefficient. Furthermore, since there is a gap between the vibrators, vibration modes other than longitudinal vibration may appear on the radiation plate, and the sound field radiated into the liquid may become non-uniform.

Further, the shape of the radiating plate is almost flat, and it is impossible to form it into a free shape.

Furthermore, there is a large difference in sound speed and density between metal and liquid (mainly water), resulting in a state of mismatch in so-called acoustic impedance.

In the latter case, there were problems of high cost and low cleaning power.

Therefore, it is an object of the present invention to provide an ultrasonic cleaning device that can effectively perform cleaning by causing ultrasonic vibrations in the cleaning tank itself.

[Structure of the invention]

(Means for Solving the Problems) The ultrasonic cleaning device according to the present invention has a cleaning tank made of a polymeric piezoelectric material, and at least one electrode for applying a voltage is provided on the outer periphery of the cleaning tank.

(Function) In the present invention, by applying an alternating current signal to the electrode, transverse effect vibration (vibration in which the direction of the electric field and the propagation direction of the elastic wave are perpendicular to each other) is generated according to the frequency of the electric signal. Vibrate the tank ultrasonically.

(Example) A first embodiment of the present invention will be described in detail with reference to FIG. establish. Then, an electrode 3 made of gold JF74NI is provided on the outer periphery of the cleaning tank 2, a polymer piezoelectric material layer is provided on the outer periphery of the electrode 3, and an electrode plate is further provided on the outer periphery.

In addition, electrode 3. j' is formed on the cleaning tank 2 and the polymeric piezoelectric material layer≠ by vacuum deposition or the like.

The first embodiment is constructed as described above, with electrodes 3. By applying an alternating current signal in the evening, transverse effect vibration (vibration in which the direction of the electric field and the propagation direction of the elastic wave are orthogonal) is generated according to the frequency of the electric signal, and the polymer piezoelectric kmψ and the cleaning tank are directly affected. The cleaning liquid is irradiated with ultrasonic energy by ultrasonic vibration.

Next, the second embodiment will be explained based on FIG. 2. In this embodiment, the bottom of the cleaning tank 2 is formed into a hemispherical shape, and everything else is the same as the first embodiment, so the same reference numerals are used. The attached explanation will be omitted.

In this embodiment, as shown by the arrow in FIG. 2, the sound is concentrated at one point.

Next, in the third embodiment, only the electrode 3 is provided on the outer periphery of the cleaning tank λ, one electrode j is omitted, and the cleaning liquid is
It acts as a pole. Therefore, in this embodiment, the cleaning 4v2 itself becomes a vibrator and vibrates ultrasonically to irradiate the cleaning liquid with ultrasonic energy.

Therefore, although the structure of the cleaning tank is simplified, the objects to be cleaned are limited to conductors.

〔Effect of the invention〕

In the present invention, the entire cleaning device 1112 vertically vibrates as a radiant plate, eliminating variations in the sound field and vibration mode. In addition, since the impedance of the polymer piezoelectric material is close to that of the liquid,
It is consistent.

゛・□” In addition, since the polymer piezoelectric material has good workability, it can be molded into any shape such as an arc, a sphere, or any other shape that matches the object to be cleaned.

Furthermore, since the polymer piezoelectric material has good wear resistance, it can be directly filled with a chemical solution and cleaned.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the first embodiment of the ultrasonic cleaning device according to the present invention, Fig. 2 is a sectional view of the second embodiment, Fig. 3 is a sectional view of the third embodiment, and Fig. μ is the conventional ultrasonic cleaning device. 5 is a bottom view of the same, and FIG. 6 is a sectional view of another conventional example. 2...Cleaning tank, 3...Electrode

Claims (1)

[Claims] An ultrasonic cleaning device characterized in that a cleaning tank is formed of a polymeric piezoelectric material, and at least one electrode for applying a voltage is provided on the outer periphery of the cleaning tank.