JPH0758073A - Cleaning apparatus - Google Patents

Abstract

PURPOSE:To secure high cleaning degree and uniform cleaning property by the improvement of the cleaning function of an apparatus and to achieve space saving and cost reduction by simplifying the constitution of the apparatus in the cleaning apparatus using liquid free from chlorofluorocarbon and othane defluorocarbonizing dethanizing. CONSTITUTION:A material to be cleaned 25 is rotated by a motor 20 to generate liquid flow, irradiated with, ultrasonic waves and subjected to composite cleaning in this cleaning apparatus. A cleaning tank 2 and two liquid storing tanks 101 and 102 are arranged with different heights. The liquid recovery from the cleaning tank 2 at the high position into the liquid storing tanks 101 and 102 at the low position is performed by free falling based on the gravity. The liquid is fed from the liquid storing tanks 101 and 102 into the cleaning tank 2 by a pump 117, which can change the moving direction by the forward and reverse rotations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing stains from an object to be cleaned such as a printed circuit board, a resin molded part, and a metal processed part to bring it to an extremely clean state. Cleaning device.

[0002]

2. Description of the Related Art C which is a conventionally used cleaning liquid
For FC-113 and 1,1,1-trichloroethane,
It has high chemical and thermal stability, has suitable solubility, is nonflammable, has a suitable boiling point that does not cause fire, has a small evaporation heat and is suitable for steam cleaning. Has permeability and low toxicity, easy consideration for working environment, high volatility and easy drying, used liquid (contaminated liquid) of cleaning liquid is easy to reuse by distillation, etc. The cleaning degree of these cleaning liquids was largely due to the cleaning property of the cleaning liquid itself, and was less due to the cleaning function of the cleaning device.

For the purpose of protecting the global environment, the abolition of specific CFCs such as CFC-113 and 1,1,1-trichloroethane (at the end of 1995) was decided, and there was a need for a high-performance alternative cleaning device for dechlorofluorocarbon-free ethane cleaning. It's getting higher.
Under the circumstances described above, various types of alternative cleaning agents have come to be marketed, but none of them has all of the above-mentioned features, and they are expected to appear in the future. It is said that it cannot be done.

On the other hand, the sophistication of technology has been steadily progressing year by year, and the background was largely due to the high degree of cleaning with CFC-113 and 1,1,1-trichloroethane. In order to secure a high degree of conventional cleaning with an alternative cleaning agent in the eradication of CFC-free ethane, there is no choice but to rely on the improvement of the cleaning function of the CFC-free ethane cleaning device.

In the conventional cleaning device, the cleaning liquid (CF
Install an ultrasonic vibrator on the side wall of the cleaning tank containing C-113 or 1,1,1-trichloroethane), or install a throw-in type ultrasonic vibrator unit inside the cleaning tank to gently clean the object to be cleaned. The cleaning process is advanced by oscillating and uniformly applying the ultrasonic wave irradiation effect to the object to be cleaned, and the cleaning property of the cleaning liquid and the cleaning property by the ultrasonic wave.

In the conventional ultrasonic cleaning, it is said that the cleaning performance is better when there is no liquid flow during the ultrasonic cleaning, and it is in principle that the object to be cleaned is gently rocked. This principle has been faithfully followed in.

The object to be cleaned after cleaning is gently pulled out from the cleaning liquid, and the specific heat of the cleaning liquid is low and easily evaporated without leaving any droplets on the object to be cleaned (dirt remains in the liquid after drying). Then, the steam is dried during the pulling and the steam is recovered in the tank by the cooler.

In this case, the dirt contained in the coating liquid of the cleaning liquid remains on the surface of the object to be cleaned after cleaning due to evaporation of the cleaning liquid. The object to be cleaned thus cleaned in the first tank is transferred to the second tank (for example, a rinsing tank), but the amount of liquid adhered (because the liquid coating is small) in the second tank The amount brought in is extremely small. The dirty cleaning liquid does not bring dirt into the second tank as it is, and only the dirt contained in the film of the cleaning liquid, which had been wet when the object to be cleaned was moved when it was pulled up from the cleaning tank, moved. .

For this reason, the progress of the dirt in the second tank is sufficiently slow, and the cleaning (or rinsing) of the second tank can be carried out very effectively with a liquid having little dirt.

In the third and subsequent tanks, rinsing (or cleaning) is performed in a liquid with less contamination.

The point of increasing the degree of cleaning after the second tank is to remove the dirt from the object to be cleaned in the cleaning tank and to minimize the amount of dirt moving to the second tank.
This was possible only with 13 or 1,1,1-trichloroethane.

[0012] In a dechlorofluorocarbon-free ethane cleaning liquid, for example, a hydrocarbon cleaning agent or an aqueous cleaning agent, the volatility is low because it has a high boiling point and a large evaporation heat. Therefore, if the dirty cleaning liquid is surely drained and the object to be cleaned is not transferred to the second tank, the cleaning degree of the second tank liquid is easily lowered due to the introduced liquid. Dirt after the tank will also progress sequentially. As a result of many droplets being brought into the drying tank after washing, it is difficult to obtain a high degree of washing after drying.

Since CFC-113 and 1,1,1-trichloroethane have high solubility and permeability, they have the property of easily dissolving stains on the article to be washed in the liquid and dispersing them in the liquid. Therefore, the dirt detached from the object to be cleaned is easily dispersed in the liquid, and the dirt is separated from the object to be cleaned one after another to be dispersed in the liquid, so that the cleaning effectively proceeds. In other words, the principle of cleaning theory is to separate dirt from the object to be cleaned.Disperse the separated dirt.Dispersion of dirt does not create a liquid layer with a high degree of dirt around the object to be cleaned, and Irradiation with ultrasonic waves in a stationary liquid was sufficient as a physical cleaning function because it has an extremely advantageous effect of not being contaminated and not lowering the cleaning degree.

No CFC-free and ethane-free cleaning agent has solubility and dispersibility at the same time, and especially when a large amount of dirt is attached, the film dirt of the object to be cleaned is exposed and the ultrasonic cleaning effect appears. It will take a long time. The separated dirt forms a liquid layer having a high dirt concentration around the object to be cleaned and floats without the dirt concentration being dispersed, so that the surface cleaning of the object to be cleaned becomes slow.

As described above, the CFC-free deethane cleaning agent is far inferior in cleanability to CFC-113 and 1,1,1-trichloroethane. Since the properties of the liquid are different, it is impossible to perform cleaning with a conventional cleaning device. In order to secure the cleaning level of the conventional level, it is necessary to supplement the cleaning level by improving the cleaning function of the cleaning device.

Further, the structure of the cleaning tank (or rinsing tank) is from the first tank (cleaning) to the second tank (cleaning or rinsing tank).
Is set to a high position in most cases, the third tank is higher than the second tank, the fourth tank is higher than the third tank, and a plurality of washing or rinsing tanks are adjacent to each other, and a new liquid is supplied to the final tank. It has a structure in which it overflows into adjacent tanks in sequence. The amount of the cleaning liquid in the first tank attached to the object to be cleaned and brought into the next tank and the amount of the liquid volatilized when the object to be cleaned is lifted after cleaning are successively reduced. The same liquid reduction occurs in the second tank, the third tank, etc., but since the new liquid supplied to the final tank overflows to the first tank in sequence and is supplied, the cleanliness of the liquid in later tanks Is kept high.

In the structure of such a cleaning tank (or rinsing tank), the object to be cleaned is accompanied by the transfer step a number of times equal to the number of tanks.

[0018]

As a matter of course, it has been decided to abolish CFC-113 and 1,1,1-trichloroethane, which were conventionally said to be all-purpose cleaners, from the standpoint of protecting the global environment. Has been taken. It is desired to develop a new cleaning device that maintains the conventional cleaning level and prevents the initial cost and running cost of cleaning from rising by supplementing the low cleaning property of the dechlorofluorocarbon-free cleaning agent with the improved cleaning function of the cleaning device. It is rare.

As a problem in the development thereof, a new cleaning method capable of ensuring the cleaning property equivalent to the conventional cleaning agent plus ultrasonic cleaning is applied, and the ultrasonic irradiation effect is uniformly applied to the object to be cleaned, and the ultrasonic cleaning is performed. It is necessary to secure the effect, etc., and it is necessary to compensate for the low cleaning property of the alternative cleaning liquid itself by improving the cleaning function.

Furthermore, the process of arranging a plurality of cleaning or rinsing tanks in parallel and transferring the object to be cleaned a number of times equal to the number of tanks is unnecessary, and the apparatus is simplified, and the initial cost and running cost (power consumption etc.) It is also required to reduce

The present invention has been devised in view of the above circumstances, and provides a cleaning device which secures a high cleaning degree and uniform cleaning property and simplifies the structure of the device to save space and reduce cost. The purpose is to provide.

[0022]

In order to achieve the above-mentioned object, the present invention is constructed as follows.

(1) The cleaning apparatus according to the first aspect of the present invention is a liquid tank to which an ultrasonic transducer is attached, and a plurality of liquid storage tanks storing the liquid to be supplied to the liquid tank. A cleaning device for rotating an object to be cleaned stored in the liquid tank to generate a liquid flow and irradiating with ultrasonic waves for cleaning. The tank
An opening / closing valve is provided at the plurality of first pipelines that are arranged with height differences and transfer liquids from a high-position liquid tank (or a plurality of liquid storage tanks) to a plurality of low-position liquid storage tanks (or a liquid tank), respectively. Are respectively provided, and a plurality of second pipelines that respectively transfer the liquid from the plurality of low-position storage tanks (or the liquid tanks) to the high-position liquid tanks (or the plurality of storage tanks) have a plurality of A forward and reverse rotatable pump capable of reversing the transfer direction is provided in a common conduit portion where any liquid corresponding to the liquid storage tank is transferred, and the liquid is transferred from the high position to the low position by the first conduit. The transfer is performed by gravity fall using gravity, and the transfer of the liquid from the low position to the high position by the second conduit is performed by the rotation of the pump.

(2) In addition to the structure of claim 1, the cleaning device of the present invention according to claim 2 has a pipe diameter of a first pipeline for transferring a liquid by gravity fall utilizing gravity. Is larger than the pipe diameter of the second pipe for transferring the liquid by the rotation of the pump.

(3) The cleaning apparatus of the present invention according to claim 3 is the same as the cleaning device according to claim 1 or 2,
A check valve is provided in the second conduit in the vicinity of the pump to shorten the common conduit portion.

[0026]

(1) According to the cleaning device of the first aspect,
By rotating the object to be cleaned and exposing the object to be cleaned to the liquid flow generated by the rotation, the dirt attached to the object to be cleaned is separated by the physical force of the liquid flow. Moreover, by irradiating the ultrasonic waves, the detachment action of the dirt is spread to every corner, and the detached dirt is dispersed to prevent the dirt from reattaching to the object to be cleaned. The surface liquid flow acts to activate the interface between the dirt on the object to be cleaned and the liquid flow, and the dirt is eluted into the liquid, and the eluted dirt is immediately dispersed by the liquid flow to increase the concentration of dirt on the interface. Contamination is continuously removed because there is no Since the dirt concentration at the interface of the object to be cleaned does not locally increase, it is possible to avoid the disadvantageous result that the cleaning degree is lowered due to recontamination. In addition, ultrasonic vibration acts on the part where the liquid flow is difficult to reach such as the inside of a small processed hole or slit and it is difficult to achieve sufficient cleaning performance only with the liquid flow, so that dirt can be removed well. The resulting dirt can be immediately dispersed by the liquid flow.

By the way, when only the ultrasonic waves without liquid flow are physically applied to the dirt accumulated in layers, it takes time to remove the dirt and the separated dirt is not dispersed. The cleaning efficiency cannot be increased because the release effect is reduced due to the increase in the cleaning efficiency and the local recontamination phenomenon occurs. Further, even a visually smooth metal surface has many microscopic irregularities, and the liquid flow alone is not sufficient for cleaning. On the other hand, as described above, the combined cleaning that simultaneously gives completely different physical actions of the liquid flow and the ultrasonic vibration makes it possible to ensure a high degree of cleaning and uniform cleaning property.

Further, in the cleaning apparatus according to the first aspect, since, for example, the cleaning liquid or the rinsing liquid can be supplied to the liquid tank from a plurality of liquid storage tanks, the conventional cleaning tank, A process of arranging a plurality of liquid tanks in parallel and transferring an object to be cleaned to each liquid tank, such as a rinse tank, becomes unnecessary.

In addition, the liquid tank and the plurality of liquid storage tanks are arranged with a height difference, and the liquid is supplied from the high position to the low position by gravity drop using gravity, and from the low position to the high position,
By supplying different liquids by reversing the transfer direction with a forward and reverse rotatable pump, the number of pumps and piping system can be simplified, space can be saved and initial cost can be reduced. And the running cost can be reduced.

(2) In the cleaning device according to the second aspect, the pipe diameter of the first pipe line for transferring the liquid by gravity falling by gravity is set to the second pipe for transferring the liquid by rotating the pump. Since it is made larger than the pipe diameter of the passage, it is possible to shorten the time required to transfer the liquid.

(3) In the cleaning device according to the third aspect, since the check valve is provided close to the pump and the common pipe line portion is shortened, different liquids are prevented from mixing. It can be suppressed as much as possible.

[0032]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a side view thereof.

In the cleaning apparatus of this embodiment, the outer casing 1 contains the cleaning tank 2 and the two liquid storage tanks 101 and 102, and the two liquid storage tanks 101 and 102 are It is placed in a low position below the washing tank. The cleaning tank 2 has a bottomed rectangular tube shape,
Hooks 3 that are continuously provided at the four corners of the upper portion are hung on the upper portion of the outer casing 1 via a vibration-proof spring 4. Shock absorbers 5 are hung between the four corners of the bottom of the cleaning tank 2 and the bottom of the outer casing 1.
Since the cleaning tank 2 contains a liquid and an object to be cleaned rotates in the liquid, the cleaning tank 2 vibrates, but the vibration-proof spring 4 and the shock absorber 5 absorb the vibration generated in the cleaning tank 2. And buffer.

The lower part of the flexible stretchable curtain 6 made of rubber containing fibers that surrounds the upper space of the cleaning tank 2 in a rectangular tube shape is externally fitted onto the upper part of the cleaning tank 2 and is clamped and fixed by a ring-shaped coil spring 7. The upper portion is externally fitted to the lower portion of the cleaning tank mouth portion 9 of the upper surface plate 8 of the outer casing 1, and is clamped and fixed by the ring-shaped coil spring 10. The flexible stretchable curtain 6 prevents the vibration of the cleaning tank 2 from being transmitted to the outer casing 1, while preventing the cleaning liquid from scattering and the vapor of the cleaning liquid from flowing out. The cleaning tank opening 9 is detachably opened and closed by a cleaning tank lid 12 having two handles 11 fixed thereto.

An opening 13 is formed from the center to the lower side of one side wall of the quadrangular cylindrical cleaning tank 2, and a diaphragm 14 is arranged facing the outside of the opening 13 and around the opening 13. Packing 1 between the cleaning tank 2 and the diaphragm 14.
The diaphragm 14 is liquid-tightly attached to the cleaning tank 2 with bolts and nuts in a state where 5 are sandwiched.

A plurality of ultrasonic transducers 16 are provided on the vibrating plate 14.
Are fixed and constitute the ultrasonic vibration unit 17.
The ultrasonic vibration unit 17 is connected to an oscillating unit 18 provided on the inner wall surface of the outer casing 1 via a lead wire and is drive-controlled at an ultrasonic frequency of 38 kHz, for example. The driven diaphragm 14 irradiates the liquid in the cleaning tank 2 with ultrasonic waves in a substantially horizontal direction.

A mounting plate 19 is fixed to the bottom surface of the bottom of the cleaning tank 2, and the inverter control motor 2 is mounted on the mounting plate 19.
0 is fixed. The motor 20 is connected to an inverter control device 21 provided in the outer casing 1 via a lead wire so that the rotation speed can be set from low speed to high speed. A rotary shaft 22 of the motor 20 penetrates into the cleaning tank 2 from the center of the bottom of the cleaning layer 2. A boss 24 fixed to the center of the lower surface of the turntable 23 is fitted to the rotary shaft 22 of the motor 20. This fitting is performed through serrations, and they are joined so as to rotate integrally in the circumferential direction and can be inserted and removed in the axial direction. The cleaning tank 2 supplies the cleaning liquid,
When the object to be cleaned 25 is put in, it descends due to gravity, and when the motor 20 is driven, it vibrates vertically and horizontally,
The vibration-proof spring 4, the shock absorber 5, and the flexible stretchable curtain 6 absorb these.

The turntable 23 is rotated with a basket 26 accommodating a single or a plurality of objects to be cleaned 25 placed thereon, and a plurality of fall prevention guards 27 are erected on the outer peripheral portion of the turntable 23. ing. 28
Is a handle of the basket 26. The basket 26 can be inserted into and removed from the cleaning tank 2 through the cleaning tank opening 9 in which the cleaning tank lid 12 is opened. The turntable 23 is positioned so that the basket 26 installed on the turntable 23 is located on the lateral side of the diaphragm 14. The turntable 23 is rotatable while the cleaning liquid is contained in the cleaning tank 2, and is also rotatable without the cleaning liquid.

In the vicinity of the periphery of the motor rotating shaft 22, the bottom of the cleaning tank 2 is bulged by drawing or the like to form an upward circumferential protrusion 29. This upward protrusion 29
An oil seal 30 that is fitted in a liquid-tight manner to an annular space 31 between the upwardly projecting circumferential projection 29 and the motor rotating shaft 22.
The inner end portion is liquid-tightly pressed against the outer peripheral surface of the motor rotating shaft 22. The upward circumferential protrusions 29 prevent solids (cutting powder) of dirt from entering the annular space 31 and suppress the wear of the oil seal 30. Drainage ports 32, 3 are provided on the outer peripheral side of the bottom of the cleaning tank 2.
3 is provided, and drainage hoses 34 and 35 communicating with the drainage ports 32 and 33 are provided. Drainage port 32,
Drain valves 36 and 37, which will be described later, are interposed between 33 and the drain hoses 34 and 35. 38 is a drain pan, 3
9 is a drain cock.

FIG. 3 is a piping system diagram of this embodiment,
The parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals.

In this embodiment, the cleaning tank 2 is arranged above the two liquid storage tanks 101 and 102, and the rinsing liquid or the cleaning liquid in the cleaning tank 2 is stored in each liquid storage tank 1.
01 and 102 are drainage hoses 34, which serve as the first conduits for recovering by utilizing the natural fall due to gravity.
35 is provided, and drain valves 36 and 37 as opening and closing valves are respectively provided in the middle thereof.

As shown in FIG. 4, the drain valves 36 and 37 are arranged such that the valve body 104 with the O-ring 103 is opened in the valve opening direction (magnet) against the biasing force of the coil spring 107 by the magnets 105 and 106. 105, 106 side)
Is sucked through the shaft 108 to form a liquid path indicated by an arrow, and the liquid is collected in the liquid storage tanks 101 and 102 by gravity. When the liquid collection is completed, the magnet 105,
The power supply to 106 is released to shut off the liquid path.
In the drain valves 36 and 37, the shaft 108 is
While being supported by the shaft support boss 109,
Liquid tightness is achieved by the valve body O-ring 110 and the spindle O-ring 111.
It is fixed to the drain valves 36 and 37 by 2.

Referring again to FIG. 3, in this embodiment,
Each liquid storage tank 101, 102 located below the cleaning tank 2
A pump 117 having a reversible function capable of normal and reverse rotations is provided in a common conduit portion of a second conduit for supplying a rinsing liquid or a cleaning liquid from the cleaning tank 2 to the cleaning tank 2, respectively. It is also driven when the rinse liquid and the cleaning liquid are supplied to the liquid storage tanks 101 and 102 from the outside. 115,115 ', 116,11
6'is a manual three-way valve for switching the flow path depending on whether liquid is supplied to the liquid storage tanks 101, 102 from outside the apparatus or liquid is supplied from the liquid storage tanks 101, 102 to the cleaning tank 2. Reference numerals 119 to 122 denote check valves for shortening the common pipe line portion to suppress mixing of the cleaning liquid and the rinsing liquid as much as possible.
0 to 152 are float switches for detecting the liquid amounts in the liquid storage tanks 101 and 102 and the cleaning tank 2, 123 and 12
4 is a filter for removing impurities and dirt, 113, 114
Is a drain valve for discharging the liquid in the liquid storage tanks 101 and 102.

Next, the operation of the cleaning apparatus having the above structure will be described.

First, the three-way valves 115 and 116 are manually operated to form a flow path from the rinsing liquid supply port 160 to the liquid storage tank 101 via the pump 117, and the pump 117 is normally driven. , Rinse liquid, the liquid supply port 1
60 to three-way valve 115, check valve 119, pump 117,
Liquid storage tank 101 via check valve 120 and three-way valve 116
Then, when the float switch 150 reaches a predetermined amount of liquid, the pump 117 is stopped to end the liquid supply.

Similarly, the three-way valves 115 ′ and 116 ′ are manually operated to form a flow path from the cleaning liquid supply port 161 to the liquid storage tank 102 via the pump 117.
The cleaning liquid is supplied in reverse by driving the
From the three-way valve 115 ′, the check valve 121, the pump 117, the check valve 122, and the three-way valve 116 ′ to the liquid storage tank 102.
When the float switch 151 reaches a predetermined liquid amount, the pump 117 is stopped to end the liquid supply.

Next, when the cleaning liquid is supplied from the liquid storage tank 102 to the cleaning tank 2, the three-way valves 115 and 116 are manually operated to pump the pump 1 from the liquid supply port 162 of the liquid storage tank 102.
A flow path is formed by the second pipe line that leads to the liquid supply port 125 of the cleaning tank 2 via 17 and the pump 117 is driven in the normal direction, so that the three-way valve 115 and the check valve 1 from the liquid storage tank 102 are formed.
19, the washing tank 2 through the pump 117, the check valve 120, the three-way valve 116, and the filter 123 as indicated by arrow A.
When the cleaning liquid is supplied to the object to be cleaned 25 and the cleaning liquid is submerged in the cleaning liquid and the float switch 152 reaches a predetermined liquid amount, the pump 117 is stopped and the liquid supply is ended.

After that, the motor 20 is rotated, and in response thereto, the turntable 23 is rotated at a low speed of, for example, about 10 rpm, and ultrasonic waves are emitted from the ultrasonic transducer unit 17 to the object to be cleaned 25 for cleaning. Done. That is, a weak liquid flow is generated in the cleaning liquid due to the low speed rotation of the basket 26 accommodating the cleaning target 25 and the turntable 23. As a result, the combined cleaning of the liquid stream cleaning and the ultrasonic cleaning is performed, and the cleaning with a high degree of cleaning is performed by the separation, dispersion and prevention of redeposition of dirt. When a predetermined ultrasonic cleaning time has passed, the motor 20 and the ultrasonic transducer unit 1
7 is stopped to complete the washing, and the drainage valve 37 is opened to collect the washing liquid in the lower storage tank 102 by gravity falling by gravity.

Next, when the rinse liquid is supplied from the liquid storage tank 101 to the cleaning tank 2, the three-way valves 115 'and 116' are used.
By manually operating the liquid supply port 163 of the liquid storage tank 101 to the liquid supply port 126 of the cleaning tank 2 via the pump 117.
By forming a flow path by a pipe line and driving the pump 117 in the reverse direction, the three-way valve 115 ′ from the liquid storage tank 101,
Check valve 121, pump 117, check valve 122, three-way valve 1
16 ', when the rinse liquid is supplied to the cleaning tank 2 through the filter 124 to the cleaning tank 2 and the object to be cleaned 25 is submerged in the rinse liquid, and the predetermined amount is reached by the float switch 152. Then, the pump 117 is stopped and the liquid supply is completed.

After that, the motor 20 rotates, and in response to this, the turntable 23 rotates at a low speed and the ultrasonic wave is radiated from the ultrasonic vibrator unit 17 to the object to be cleaned 25, and the liquid flow and the ultrasonic vibration are generated. The combined rinsing is performed. When a predetermined rinsing time has passed, the driving of the motor 20 and the ultrasonic transducer unit 17 is stopped to complete the rinsing, and the drain valve 36 is opened to remove the rinsing liquid from the lower storage tank 101.
It is recovered by utilizing the natural fall of gravity.

When the rinse liquid is collected, the object to be cleaned 25 is rotated at a high speed to drain the liquid.

In this way, the object to be cleaned 25 is rotated in the cleaning liquid to generate a liquid flow, and the ultrasonic wave is irradiated to the rotating object to be cleaned 25. Since the combined cleaning that gives the action at the same time is performed, a high cleaning degree and uniform cleaning performance can be secured.

Furthermore, since cleaning, rinsing and draining can be performed in one cleaning tank 2, a plurality of liquid tanks are provided side by side, such as a cleaning tank and a rinse tank, as in the conventional case. The process of transferring to a liquid tank is not necessary, the efficiency as a whole is improved, and the space efficiency is good.

Moreover, the cleaning tank 2 and the liquid storage tanks 101, 1
02 is arranged at a height difference, and the liquid is collected from the cleaning tank 2 to each of the liquid storage tanks 101 and 102 by gravity drop using gravity, and the liquid is collected from each of the liquid storage tanks 101 and 102 to the cleaning tank 2.
Since the single pump 117 capable of rotating in the normal and reverse directions reverses the transfer direction, the number of pumps can be reduced and the piping system can be simplified, resulting in installation space, initial cost and It is possible to significantly reduce running costs.

Further, in this embodiment, since the liquid recovery pipe utilizing gravity is thicker than the pipe of the supply system by the pump 117, the liquid recovery time can be shortened.

Further, in this embodiment, the check valves 119-
122 is arranged as close as possible to the pump 117, and the common pipe line portion between the cleaning liquid and the rinsing liquid is in the pump 117 and in the pipe surrounded by the check valves 119, 120, 121 and 122. As a result, the mixing of the two liquids can be suppressed. As a result, the cleanliness of the rinsing liquid can be maintained for a long time, high cleanliness can be obtained, and the liquid can be used for a long period of time, and the running cost can be reduced.

In the above-mentioned embodiment, the cleaning tank 2 is arranged at a position higher than the two liquid storage tanks 101 and 102. However, as another embodiment of the present invention, the two liquid storage tanks 101 and 102 are provided. May be disposed at a position higher than the cleaning tank 2, and contrary to the above-described embodiment, the liquid may be supplied from each of the tanks 101 and 102 to the cleaning tank 2 by using gravity drop by gravity. .

In the above embodiment, the single cleaning tank 2 is used.
In contrast, although two liquid storage tanks 101 and 102 are provided, as another embodiment of the present invention, the liquid storage tank 10
Of course, the numbers of 1, 102 and pumps 117 may be increased.

Further, as another embodiment of the present invention, in the liquid supply stage for performing the combined cleaning in the cleaning liquid, while rotating the turntable 23, the object to be cleaned 25 in the basket 26 on the turntable 23 is rotated. Then, the cleaning solution is showered, and the cleaning object 25 is cleaned by the impact force of the shower ring on the rotating cleaning object 25, and the cleaning solution containing the initial stain is supplied to the shower ring and is cleaned in the cleaning tank 2
You may make it perform the complex washing | cleaning in a washing | cleaning liquid after discharge | emitting outside.

Furthermore, as another embodiment of the present invention, a temperature sensor and a heater are installed in each of the liquid storage tanks 101 and 102, and a pipe for circulating the liquid in each of the tanks 101 and 102 by a pump is provided. Form and wash tank 2
When the liquid is not supplied, the liquid may be circulated to be maintained at a predetermined temperature while being circulated. According to this structure, higher cleaning performance can be obtained.

[0062]

As described above, according to the present invention, since the combined cleaning is performed by the liquid flow generated by rotating the object to be cleaned and the ultrasonic waves, it is possible to secure a high cleaning degree and uniform cleaning property. Also, since it is possible to supply liquid from a plurality of liquid storage tanks to a liquid tank, a plurality of liquid tanks are installed side by side, such as a cleaning tank and a rinsing tank, as in the prior art, so that the object to be cleaned is placed in each liquid tank. Since the process of transferring to, is not necessary, the efficiency as a whole is improved and the space efficiency is good.

In addition, the liquid tank and the plurality of liquid storage tanks are arranged with a height difference, and the liquid is supplied from the high position to the low position by gravity dropping using gravity, and from the low position to the high position,
By supplying different liquids by reversing the transfer direction with a forward and reverse rotatable pump, the number of pumps and piping system can be simplified, space can be saved and initial cost can be reduced. And the running cost can be reduced.

Furthermore, since the diameter of the pipe using the free fall is increased, the time required to transfer the liquid can be shortened.

Moreover, since the check valve is arranged close to the pump to shorten the common conduit portion through which different liquids flow, it is possible to suppress mixing of different liquids as much as possible and to clean the liquids. You can keep a high degree.

[Brief description of drawings]

FIG. 1 is a front view of a cleaning device according to an embodiment of the present invention.

2 is a side view of the embodiment of FIG. 1. FIG.

FIG. 3 is a piping system diagram of the embodiment of FIG.

4 is a cross-sectional view of the drainage valve of the embodiment of FIG.

[Explanation of symbols]

 2 Cleaning Tank 16 Ultrasonic Transducer 17 Ultrasonic Transducer Unit 20 Inverter Control Motor 23 Turntable 25 Cleaning Object 36, 37 Drain Valve 101, 102 Liquid Storage Tank 117 Pump 119-122 Check Valve

Claims (3)

[Claims] 1. A liquid tank to which an ultrasonic transducer is attached,
A plurality of liquid storage tanks for storing the liquid to be supplied to the liquid tank, and ultrasonic cleaning is performed while rotating the object to be cleaned stored in the liquid tank to generate a liquid flow. In the cleaning device, the liquid tank and the plurality of liquid storage tanks are arranged with a height difference, and the liquid tank (or a plurality of liquid storage tanks) at a high position to a plurality of liquid storage tanks at a low position ( An opening / closing valve is provided in each of the plurality of first conduits for transferring the liquid to each of the liquid tanks), and the plurality of liquid tanks (or the liquid tanks) in the low position to the liquid tanks (or the plurality of liquid tanks in the high position) are provided. Storage tank)
A plurality of second pipelines for respectively transferring liquids to each of the plurality of liquid storage tanks is provided with a pump capable of reversing the transfer direction in a common pipeline section for transferring any liquid corresponding to the plurality of liquid storage tanks. The transfer of the liquid from the high position to the low position by the first conduit is performed by gravity fall using gravity, and the transfer of the liquid from the low position to the high position by the second conduit is performed by the pump. A cleaning device characterized by being rotated. 2. The pipe diameter of a first pipe line for transferring a liquid by gravity fall utilizing gravity is made larger than the pipe diameter of a second pipe line for transferring a liquid by rotation of the pump. The cleaning device according to the item. 3. The cleaning apparatus according to claim 1, wherein a check valve is provided in the second pipeline in the vicinity of the pump, and the common pipeline portion is shortened.