JP3142412B2 - Bubbling cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubbling cleaning apparatus for cleaning an object to be cleaned by applying ultrafine air bubbles to the object in a water tank.

[0002]

2. Description of the Related Art Freon has been generally used for cleaning semiconductor parts, watch parts, glass parts, plastic parts and the like. However, the use of CFCs has been totally abolished in view of pollution problems such as the risk of destruction of the ozone layer, and new cleaning techniques have been required.

A so-called bubbling cleaning device is known as a cleaning device that does not use Freon, in which air bubbles are sprayed on an object to be cleaned accommodated in a water tank, and cleaning is performed by utilizing a dirt entrapping action of the air bubbles and a burst effect of the air bubbles. Have been.

[0004]

However, in this type of apparatus, since the diameter of bubbles generated in the water tank is relatively large, bubbles cannot penetrate into minute gaps, and a sufficient cleaning effect cannot be expected. Was. The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to form a forced circulation flow in a water tank by injecting a gas into a cleaning liquid in an ultrafine particle state, and disperse in the forced circulation flow. It is an object of the present invention to provide a bubbling cleaning apparatus having an excellent cleaning effect by applying ultra-fine bubbles to an object to be cleaned.

[0005]

According to a first aspect of the present invention, there is provided a bubbling cleaning apparatus, comprising: a water tank filled with cleaning water and containing an object to be cleaned; a water tank provided in the water tank or on a wall of the water tank; A gas-liquid mixture injection nozzle that forms a forced circulation flow in which bubbles are dispersed, comprising: a gas-liquid mixture injection nozzle that forms a forced circulation flow in which a bubble is dispersed. An annular vortex chamber formed at a position, and a swirl guide hole that spirally extends into the annular vortex chamber, introduces the supplied washing water into the vortex chamber at a high speed, and forms a high-speed vortex flow in the vortex chamber. And an annular liquid injection port formed at a position surrounding the gas outlet of the vortex chamber and injecting a high-speed vortex in the shape of a tapered cone in front of the gas outlet.

According to a second aspect of the present invention, in the bubbling cleaning device according to the first aspect, the gas ejection port of the injection nozzle communicates with the atmosphere via an air pipe, and the liquid from the liquid injection port is discharged. A negative pressure region is formed in front of the gas outlet with the injection, and the negative pressure is used to suck and eject air forward from the gas outlet.

[0007]

The high-speed swirling flow of the cleaning liquid formed in the vortex chamber is jetted from the annular liquid jet port to the front of the gas jet port to form a conical high-speed vortex stream in front of the nozzle in the water tank. Then, the gas ejected from the gas ejection port is crushed by being contacted with the high-speed vortex of the washing water formed around the gas by being ejected from the liquid ejection port, is forcedly mixed and diffused, and ultra-fine particle bubbles are provided in front of the nozzle. A swirling flow of the washing water in which is dispersed is formed. A forced circulation flow in which bubbles are dispersed is formed in the water tank by the operation of the nozzle, and the ultrafine bubbles dispersed in the circulation flow come into contact with the object to be cleaned in the water tank to wash dirt.

According to a second aspect, the liquid-gas mixture injection nozzle is
The structure uses a so-called ejector function, in which the liquid is sucked and ejected by using a negative pressure formed in front of the gas ejection port when the liquid is ejected from the liquid ejection port. There is no need to pump gas to the outlet.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention.
Is an overall schematic view of the bubbling cleaning apparatus, FIG. 2 is a plan view of the apparatus, FIG. 3 is an enlarged front view of an ejector type vortex-type gas-liquid mixture injection nozzle which is a main part of the apparatus, and FIG. FIG. 5 is a front view (a cross-sectional view taken along line IV-IV shown in FIG. 3, and FIG. 5 is a perspective view of a turning guide hole forming portion in which the turning guide hole is formed).

In these figures, reference numeral 10 denotes a water tank filled with a cleaning liquid, in which an object W to be cleaned is accommodated by being suspended or the like. Code 12 (1
2a, 12b) are cleaning water circulation pipes provided between the cleaning liquid suction port 13 and the cleaning liquid discharge port 14 provided on the side wall of the water tank 10, and one end of the pipe 12 has a purification tank 15 provided adjacent to the water tank 10. The other end of the pipe 12 is connected to an ejector type vortex-type gas-liquid mixture injection nozzle (hereinafter simply referred to as a nozzle) 30 provided at the discharge port 14. In the middle of the circulation pipe 12, a diaphragm pump 16
Is provided, the washing water in the water tank 10 is supplied to the circulation pipe 1.
2 for circulation.

In the septic tank 15, a filter 17 for filtering the washing water sucked from the suction port 13 is provided. Reference numeral 18 denotes an air vent pipe for discharging air generated in the septic tank 15. In the middle of the circulation pipe 12 b between the nozzle 30 and the pump 16, a washing water jet 20 opening into the water tank 10 is provided, and the washing water circulated by the circulation pipe 12 is supplied from both the nozzle 30 and the jet 20. It is supplied into the water tank 10. Reference numeral 22 denotes a circulating cleaning water amount adjustment valve supplied to the nozzle 30.

Numeral 24 denotes an air suction pipe for supplying air to the nozzle 30. A filter 26 is provided at an upper end opening of the air suction pipe 24. The cleaning of parts and the like is effective in removing various bacteria such as bacteria. Reference numeral 28 denotes a valve for adjusting the amount of suction air supplied to the nozzle 30, and adjusts the amount of air sucked under negative pressure into the gas ejection port 32, that is, the amount of air ejected from the gas ejection port 32. Reference numeral 29 denotes a drain for discharging cleaning water. Reference numeral H denotes a heater for maintaining the cleaning water in the water tank 10 at a predetermined temperature optimum for cleaning.

As shown in FIGS. 3 and 5, the injection nozzle 30 has a gas outlet 32 having a circular cross section communicating with the air suction pipe 24, and an annular vortex chamber 34 surrounding the gas outlet 32. A plurality of swirling guide holes 36 spirally extending from a cylindrical circulating cleaning water supply chamber 35 extending back and forth to a swirl chamber 34, and an annular liquid formed on the side of the swirl chamber 34 facing the gas ejection port 32. The injection port 38 has a structure formed in the nozzle casing 31.

On the side of the nozzle casing 31, there is formed a pipe connecting portion 31a which communicates with the washing water supply chamber 35 and is connected to the circulation pipe 12b. Is connected to the air supply chamber 33a. As shown in FIGS. 3 to 5, the swirling guide hole 36 spirally extends from the cleaning water supply chamber 35 to the front swirl chamber 34.
When passing through 6, it becomes a high-speed water flow. In the swirl chamber 34, a swirling water flow is formed by the high-speed water flow pumped by the swirling guide hole 36, and the high-speed swirling water flow is jetted from the narrowed annular liquid jet port 38 toward the front of the gas jet port 32,
A high-speed eddy current having a tapered conical shape having a focus on the symbol O is formed (see FIGS. 1, 2, and 4).

The core 33 having the gas outlet 32 formed therein is accommodated in the nozzle casing 31 so that the washing water supply chamber 35, the swirl guide hole 36, the vortex chamber 34, and the liquid jet port 38
Is formed, and the annular liquid ejection port 38 opens toward a point on the axis L. Therefore, the high-speed swirling flow injected from the liquid injection port 38 becomes a high-speed swirling flow having a tapered conical shape having a point O on the axis L as a focal point.

On the other hand, the gas ejection port 32 is connected to the air suction pipe 2.
When the cleaning water is jetted from the liquid jet port 38, a negative pressure is generated in the gas jet port 32 when the washing water is jetted from the liquid jet port 4, so that the negative pressure causes the air to be sucked and jetted from the gas jet port 32. (See the white arrow in FIG. 4). And gas outlet 3
The air sucked and ejected from the nozzle 2 comes into contact with the conical high-speed vortex jet formed from the liquid jet port 38 and is crushed, forcibly mixed and diffused, and dispersed as ultrafine bubbles.

Reference numeral 39 denotes a fastening nut screwed into a male screw 39a formed on the outer periphery of the front end of the nozzle casing 31.
The nozzle 30 can be fixed to the side wall of the water tank 10 by sandwiching the side wall of the water tank 10 with the side wall 9b. As described above, in the bubbling cleaning device according to the present embodiment, the air sucked and ejected from the gas ejection port 32 comes into contact with the conical high-speed vortex of the washing water ejected from the annular liquid ejection port 38, and is crushed and forced. By mixing and diffusing, a circulating flow is formed as shown by the white arrows in FIGS. Then, in the flow of the circulating flow, the bubbles rise by buoyancy while circulating, and at this time, the cleaning object W
To clean dirt. That is, since the bubbles dispersed in the circulating washing water are in the form of ultrafine particles that could not be obtained in the past, the contact area between the bubbles and the object to be cleaned is large, and it is assumed that the cleaning effect is extremely high.

In the apparatus of this embodiment, since air is sucked by the ejector method, an energy source such as a blower for supplying air is not required, which leads to saving of energy consumption. Further, in the construction of the apparatus of the present embodiment, it is only necessary to install the compact ejector type vortex-type gas-liquid mixture injection nozzle 30 shown in the present embodiment at the circulating liquid discharge port of the circulation pipe in the conventional bubbling cleaning apparatus, Construction is also very simple.

In the above embodiment, the air is self-supplied by an ejector system utilizing a negative pressure due to the injection of a liquid. However, a blower is provided in the air suction pipe 24 to force the air into the gas outlet. 32. 6 and 7 show a second embodiment of the present invention. FIG. 6 shows a front view of an ejector-type vortex-type gas-liquid mixture injection nozzle which is a main part of a bubbling cleaning device.
Shows a vertical sectional view of the nozzle.

In the injection nozzle 30 according to the first embodiment, a plurality of swirling guide holes 36 having a relatively small flow path area extending in a spiral shape extend into the swirl chamber 34, and furthermore, the swirl chamber 34
Although the area of the flow path of the liquid ejection port 38 provided in the nozzle is formed relatively small, in the present embodiment, one swirl guide hole 46 having a relatively large flow area extends to the swirl chamber 34, and The liquid ejection port 38 is formed by a flow path 48 extending in a conical shape with a relatively large flow path area from the chamber 34, and has a structure that is hardly clogged by the large flow path area. That is, as shown in FIGS. 6 and 7, even if the flow passage area of the liquid injection port 38 is formed large, it is possible to achieve the same degree of atomization of air bubbles as in the first embodiment, and the cleaning effect is improved by the first embodiment. It is not inferior to the embodiment. The other parts are the same as those of the first embodiment, and the description thereof will be omitted by retaining the same reference numerals.

FIG. 8 is a plan view of a bubbling cleaning apparatus according to another embodiment of the present invention. In the above-described embodiment, the water tank 10 has a structure in which one nozzle 30 is provided. However, in the present embodiment, two nozzles 30 are arranged side by side, and one nozzle is activated at predetermined time intervals. A circulating flow (see symbols F ₁ and F ₂ ) in opposite directions is formed to enhance the cleaning effect.

Further, as shown in FIG.
By disposing them on the side wall of the water tank with different installation positions, a structure that further enhances the cleaning effect may be adopted. Further, the cleaning effect may be enhanced by combining the valve ring cleaning apparatus shown in the various embodiments described above with a conventionally known ultrasonic cleaning technique.

[0023]

As is apparent from the above description, according to the bubbling cleaning apparatus of the present invention, the gas ejected from the gas ejection port is crushed by the high-speed vortex jet ejected from the liquid ejection port, and is forcedly mixed and diffused. Then, a forced circulation flow in which ultrafine bubbles are dispersed is formed in the water tank. For this reason, the ultrafine air bubbles that can secure a large contact area with the object to be cleaned can reliably remove dirt in the minute gaps of the object to be cleaned, and a remarkable cleaning effect can be achieved.

In the second aspect, since the nozzle has an ejector structure, there is no need for a means for sending air to a gas ejection port such as a blower or a pump, which is effective in saving energy.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a bubbling cleaning apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the apparatus.

FIG. 3 is a front view of an ejector type vortex-type gas-liquid mixture injection nozzle which is a main part of the bubbling cleaning device.

FIG. 4 is a longitudinal sectional view of the nozzle (a sectional view taken along line IV-IV shown in FIG. 3).

FIG. 5 is a perspective view of a turning guide hole forming unit.

FIG. 6 is a front view of an ejector-type vortex-type gas-liquid mixture injection nozzle which is a main part of another embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of the nozzle.

FIG. 8 is a plan view of a bubbling cleaning apparatus according to still another embodiment of the present invention.

FIG. 9 is a plan view of a bubbling cleaning apparatus according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Water tank 12 (12a, 12b) Cleaning water circulation pipe 13 Cleaning water suction port 14 Cleaning water discharge port 16 Pump 24 Air suction pipe 30 Ejector type vortex type gas-liquid mixture injection nozzle 31 Nozzle casing 32 Gas ejection port 33 Core 34 Vortex Chambers 36, 46 Swirling guide holes 38 Liquid injection ports

Claims (2)

(57) [Claims] 1. A water tank filled with cleaning water and containing an object to be cleaned, and a gas-liquid mixture provided in the water tank or on the wall of the water tank and forming a forced circulation flow in which microbubbles are dispersed in the water tank. A bubbling cleaning device comprising: an injection nozzle, wherein the injection nozzle has a gas outlet opening forward, an annular vortex chamber formed at a position surrounding the gas outlet, and the annular shape. A swirling guide hole that spirally extends into the swirl chamber, introduces the supplied cleaning water into the swirl chamber at a high speed, and forms a high-speed swirl flow in the swirl chamber; and is formed at a position surrounding a gas outlet of the swirl chamber. A bubbling cleaning device, comprising: an annular liquid injection port which forms a tapered conical high-speed vortex in front of a gas injection port. 2. A gas jet of the jet nozzle is communicated with the atmosphere through an air pipe, and the gas jet is formed by a negative pressure formed in front of the gas jet when the liquid is jetted from the liquid jet. 2. The bubbling cleaning device according to claim 1, wherein air is sucked and ejected forward from the baffle.