JPH0425274Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ultrasonic cleaning device used for cleaning containers containing liquid, such as bathtubs and water tanks.

[Prior Art] Conventionally, methods for removing dirt from the walls of containers such as bathtubs include (1) a mechanical method of scrubbing the walls with a scrubbing brush or brush, and (2) the method described in (1) above. In addition to mechanical methods, methods that improve the dirt removal function by using detergents, surfactants, or abrasives; (3) methods that use chemicals to act on dirt on the vessel walls;
A method of removing dirt by causing a chemical change between the two is widely known.

However, in methods (1) and (2) above,
Since all of this is done manually by the operator, it requires a considerable amount of effort to thoroughly clean every corner. Furthermore, method (3) has disadvantages such as the fact that depending on the chemicals used, the vessel wall itself may undergo chemical changes and deteriorate.

Therefore, in order to solve this problem, the bottom of the container has a double structure, an ultrasonic cleaning device is installed on the upper bottom, and the inside of the container is cleaned with this ultrasonic cleaning device. Are known. The above-described ultrasonic cleaning device is capable of removing dirt from every corner by sending generated ultrasonic waves into the water inside the container and transmitting the ultrasonic vibrations through the container wall.

However, in the conventional structure described above, the ultrasonic cleaning device is fixed to the bottom of the container, so it cannot be used to clean other containers.
The problem is that it lacks versatility.

Therefore, for example, in Japanese Utility Model Application Publication No. 58-146579,
An immersion type vibrator is disclosed that is configured to be submerged in a liquid to generate ultrasonic vibrations. In this device, metal blocks such as stainless steel are bolted to both end faces of the piezoelectric body, and the vibrator, that is,
An ultrasonic generator is configured. Then, a signal from a high-frequency oscillation unit configured separately from the vibrator is passed through lead wires connected to the piezoelectric body and one metal block that is exposed to the outside and functions as an ultrasonic radiation surface. By supplying the piezoelectric material, ultrasonic vibrations are generated in the piezoelectric body, and the ultrasonic waves are radiated from the externally exposed surface of the metal block.

[The problem that the idea aims to solve]

However, in the device described in the above-mentioned conventional publication, the high frequency signal supplied to the piezoelectric body is applied to the piezoelectric body through a metal block exposed to the outside, so when it is submerged in water such as a bathtub. There is a risk of electrical leakage, and there is also a risk of electric shock if one puts one's hand into water while the signal is being energized, resulting in the problem that sufficient safety cannot be ensured.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an ultrasonic cleaning device that can be suitably used for cleaning the walls of bathtubs, etc., and can ensure safety. It is about providing.

[Means to solve the problem]

In order to achieve the above object, the ultrasonic cleaning device of the present invention includes a high frequency oscillator that generates a high frequency signal, and is covered with a waterproof case and generates an ultrasonic wave based on the signal sent from the high frequency oscillator. an ultrasonic generation section having an ultrasonic generator that generates sound waves, the ultrasonic generation section and the high frequency oscillation section are connected by a waterproof connection cord, and the ultrasonic generator is equipped with a piezoelectric It is formed by arranging a pair of metal blocks with the body in between, and screwing the tip of a bolt inserted through the end face of one metal block to the other metal block, and The end face is attached to the inner surface of the case, one of the pair of lead wires is connected to the piezoelectric body, and the other lead wire is connected to the head of the bolt that passes through the piezoelectric body without contacting it. It is characterized in that a high frequency signal is applied to the piezoelectric body.

[Effect]

In the above configuration, only the ultrasonic generation section separate from the high frequency oscillation section is placed in a container containing water, such as a bathtub, and the ultrasonic wave is emitted from the ultrasonic generation section. The walls of the vessel can be cleaned.

In the above, the signal path for sending a high-frequency signal to the piezoelectric body of the ultrasonic wave generator consists of one lead wire that is directly connected to the piezoelectric body, and a path from the other lead wire through the bolt and metal block. has been done. In this case, since the signal is applied to the piezoelectric body without passing through the case etc. exposed to the outside, it is possible to insulate the case from the signal path by, for example, an adhesive layer. Even if the ultrasonic generator is submerged in water in a bathtub, for example, the risk of electrical leakage or electric shock is eliminated, thereby improving safety.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

As shown in FIG. 1, the ultrasonic cleaning device according to the present invention includes an ultrasonic generator 1 and an ultrasonic generator 1.
The control unit 2 controls the operation of the controller. The ultrasonic generator 1 and the control section 2 are connected by a waterproof connection cord 3, and the control section 2 is connected to a power cord 4 and a power plug 5.

As shown in FIG. 3, the above-mentioned ultrasonic generator 1 has an outer case 6 having a waterproof structure in the shape of a truncated quadrangular pyramid, and the top wall 6a of the outer case 6 functions as a diaphragm. There is. At the center of the upper end of the two opposing sides of the outer case 6, an annular chain connection part 6b,
6b is formed, and the ends of the chain 7 are attached to the chain connections 6b, 6b. Note that the outer case 6 is subjected to strong vibrations from the vibrator 8, which will be described later, and therefore has high strength and hardness.
It also needs to be made of a material that does not easily rust. Examples of this material include stainless steel (SUS304)
is suitable.

Inside the outer case 6, there is a columnar 4
A book Langevin type vibrator 8 is provided. This vibrator 8 constitutes an ultrasonic generator, and as shown in FIG. 2, two disc-shaped piezoelectric bodies 10, 10 are sandwiched, and this cylindrical body 9,
9 and the piezoelectric bodies 10, 10 are integrated with a bolt 11 inserted from below. This bolt 11
is made of an electrically conductive material, and is electrically connected to both the cylindrical bodies 9, 9, but not to the piezoelectric bodies 10, 10. As shown in FIG. 3, each vibrator 8 has an end surface opposite to the insertion side end surface of the bolt 11 attached to the lower surface of the top wall 6a of the outer case 6, so that each vibrator 8 has a hanging shape. are arranged in parallel.
Further, a pair of lead wires introduced into the outer case 6 through the connection cord 3 and for supplying a high frequency signal to each vibrator 8 is connected at a position where one is sandwiched between the piezoelectric bodies 10 and 10. The other side is the bolt 1 mentioned above.
It is connected to the head of 1.

Note that the vibrator 8 is not limited to the above-mentioned Languevent type, but may vibrate and generate ultrasonic waves by receiving a high frequency signal sent from the oscillator 12 of the control unit 2, as described later. Good to have. However, the above-mentioned Langevin type is suitable as one that can obtain low frequency ultrasonic waves and can cause the cavitation phenomenon.

On the other hand, the control section 2 has an oscillator 12 which is a high frequency oscillation section, as shown in FIG.
It is connected to the power cord 4 through a timer switch 13 having a switch 3a and a switch 13b.

In the above configuration, when using this device, first, as shown in FIG.
The ultrasonic generator 1 is suspended by holding the chain 7 into the bathtub 14 which is a container to be cleaned containing the ultrasonic generator 1. Then, as shown in FIG. 6, the ultrasonic generator 1 is placed at the bottom of the bathtub 14. At this time, if a suction plate 16 is attached to the end of the chain 7 and the suction plate 16 is suctioned to the wall of the bathroom, it is convenient to take the ultrasonic generator 1 in and out.

Next, the operation section 13a of the timer switch 13 in the control section 2 is turned to set the operating time of the ultrasonic generator 1. As a result, timer switch 1
The switch 13b of No. 3 is turned on, power is supplied to the oscillator 12, and a high frequency signal is generated. This high frequency signal is sent to the ultrasonic generator 1 through the connection cord 3, and is sent to the piezoelectric body 10 in each vibrator 8.
...is supplied to... The piezoelectric bodies 10... receive high frequency signals and convert them into mechanical vibrations. At this time, in the vibrator 8, since the two piezoelectric bodies 10, 10 are provided one on top of the other,
The resulting vibration will be large.

The vibrations generated by the piezoelectric bodies 10, 10 are transmitted to the cylindrical body 9.
The water is transmitted to the top wall 6a forming the diaphragm of the outer case 6, and as shown in FIG.
Ultrasonic waves are emitted during 5. This ultrasonic wave mainly travels directly above the ultrasonic wave generator 1, but also spreads laterally, is reflected on the walls of the bathtub 14, and becomes a reflected wave that reaches every corner of the bathtub 14. Wander. Then, by receiving the ultrasonic waves, as shown in FIG. 8, dirt 17 such as dirt attached to the vessel wall is removed.

The above-mentioned ultrasonic cleaning effects include those due to acceleration phenomena and those due to cavitation. The cleaning effect due to the acceleration phenomenon occurs in all frequency bands of ultrasonic waves. That is, the molecules of the water 15 are vibrated by the ultrasonic waves, and even fine dirt can be removed by the vibration of the molecules of the water 15.

On the other hand, the cleaning effect due to cavitation occurs when the frequency of ultrasonic waves is approximately in the range of 15 to 50 KHz. That is, in the above frequency band, cavitation occurs in the water 15. Then, the cavity 18 created by this cavitation immediately breaks, and when the cavity 18 breaks, a shock wave is generated in the water. The dirt 17 attached to the wall of the bathtub 14 is removed by this shock wave. Therefore, if the ultrasonic frequency is set approximately in the range of 15-50KHz,
The cleaning effect due to cavitation is added to the cleaning effect due to the above acceleration phenomenon, and the cleaning effect can be further improved. In order to obtain cavitation, the frequency of the ultrasonic waves can be set within the above range by, for example, adjusting the length of each vibrator 8. That is, when the length of the transducer 8 is increased, the frequency of the generated ultrasonic wave becomes lower, and when the length is increased, the frequency of the generated ultrasonic wave becomes higher.

Next, after a predetermined period of time has elapsed, the timer switch 13 turns off the operation of the device, and the generation of ultrasonic waves is stopped. Thereafter, when the water 15 in the bathtub 14 is drained, the water 15 and the dirt 17 . . . are removed from the bathtub 14. Here, if the bathtub 14 is large, before draining the water 15 in the bathtub 14, it is advisable to move the placement location of the ultrasonic generator 1 and perform cleaning again.

In addition, due to the cleaning operation of this device described above, the bathtub 1
The dirt 17 in No. 4 is sufficiently removed, but by adding detergent to the water 15 during the cleaning operation,
Furthermore, the cleaning effect can be enhanced.

As explained above, in the above embodiment,
Only the ultrasonic generator 1, which is configured separately from the control unit 2, is submerged in a bathtub 14 containing water 15.
By emitting ultrasonic waves from the ultrasonic generator 1, the wall of the bathtub 14 can be cleaned.

In the above, the signal path for sending a high frequency signal to the piezoelectric body 10 of each vibrator 8 in the ultrasonic generator 1 is connected to one lead wire connected to the piezoelectric bodies 10, 10 and the other lead wire. , and a route passing through the bolt 11 and the cylindrical body 9. In this case, since the signal is applied to the piezoelectric bodies 10, 10 without going through the outer case 6 exposed to the outside, it is possible to insulate the outer case 6 from the signal path at the adhesive layer, for example. As a result, even if the ultrasonic wave generator 1 is submerged in water in a bathtub, for example, there is no risk of electrical leakage or electric shock, thereby improving safety.

Note that the number of piezoelectric bodies 10 in each vibrator 8 is not limited to two as described above;
If the cost is balanced, it is also possible to have a configuration with three or more. At this time, even more powerful ultrasonic waves can be obtained.

In addition, this ultrasonic cleaning device is applicable to cleaning Western-style bathtubs or bathtubs without a water heating device, bathtubs with an outer pot burner, and other containers that have spaces or openings above the water surface, such as water tanks and water storage containers. can do.

[Effect of idea]

As described above, the ultrasonic cleaning device of the present invention includes a high-frequency oscillation unit that generates a high-frequency signal, is covered with a waterproof case, and generates ultrasonic waves based on the signal sent from the high-frequency oscillation unit. and an ultrasonic generation section having an ultrasonic generator, the ultrasonic generation section and the high frequency oscillation section are connected with a waterproof connection cord, while the ultrasonic generator is connected with a piezoelectric material in between. It is formed by arranging a pair of metal blocks and screwing the tip of a bolt inserted from the end face of one metal block to the other metal block, and the end face of the other metal block is connected to the inner surface of the case. one of the pair of lead wires is connected to the piezoelectric body, and the other lead wire is connected to the head of the bolt that passes through the piezoelectric body without contacting the piezoelectric body. This is a configuration in which a high frequency signal is applied.

As a result, the signal sent to the ultrasonic generator is
Since the voltage is applied to the piezoelectric body without passing through the case exposed to the outside, it is possible to insulate the case from the signal path, for example, by an adhesive layer, thereby making it possible to Even if the device is submerged in water in a bathtub, the risk of electrical leakage or electric shock is eliminated, and safety can be improved.

[Brief explanation of the drawing]

1 to 8 show one embodiment of the present invention, in which FIG. 1 is a perspective view showing the overall configuration of an ultrasonic cleaning device, and FIG. 2 is a perspective view of the vibrator shown in FIG. 1. A perspective view, FIG. 3 is a vertical cross-sectional view showing the internal structure of the ultrasonic generator, FIG. 4 is a circuit diagram of the ultrasonic cleaning device, and FIG. 5 is an explanatory diagram showing the arrangement of the ultrasonic generator in the bathtub. , FIG. 6 is an explanatory diagram showing the state of cleaning of the bathtub by the ultrasonic cleaning device, FIG. 7 is an explanatory diagram showing the state of transmission of ultrasonic waves into the bathtub, and FIG. 8 is an explanatory diagram showing the state of cleaning of the bathtub by ultrasonic waves. It is an explanatory diagram. 1 is an ultrasonic generator, 2 is a control unit, 3 is a connection cord, 6 is an outer case, 7 is a chain, 8 is a vibrator (ultrasonic generator), 9 is a cylindrical body (metal block), 10 is a piezoelectric body , 11 is a bolt, 12 is an oscillator (high frequency oscillation unit), 13 is a timer switch, 14 is a bathtub (container), 15 is water, 16 is a suction plate, 17 is dirt, 1
8 is hollow.

Claims (1)

[Scope of utility model registration request] comprising a high frequency oscillation unit that generates a high frequency signal, and an ultrasonic generation unit that is covered with a waterproof case and has an ultrasonic generator that generates ultrasonic waves based on the signal sent out from the high frequency oscillation unit, The above-mentioned ultrasonic generator and high-frequency oscillator are connected by a waterproof connection cord, and the above-mentioned ultrasonic generator has a pair of metal blocks arranged with a piezoelectric body in between, and an end face of one of the metal blocks. It is formed by screwing and fastening the tip end of a bolt inserted through the metal block to the other metal block, and the end face of the other metal block is adhered to the inner surface of the case, and one of the pair of lead wires is attached to the other metal block. The ultrasonic device is connected to the piezoelectric body, and the other lead wire is connected to the head of the bolt passing through the piezoelectric body without contacting the piezoelectric body, thereby applying a high frequency signal to the piezoelectric body. Sonic cleaning device.