JPH0349636B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an ultrasonic cleaning device having a deodorizing device, and more specifically, the present invention relates to an ultrasonic cleaning device having a deodorizing device. The present invention relates to an ultrasonic cleaning device characterized by circulating a cleaning liquid so as to be able to adapt to an optimum temperature for high effectiveness.

[Conventional technology]

Conventionally, an ultrasonic cleaning device having a deaerator has been proposed. That is, the applicant previously filed an application, which states that when ultrasonic waves are radiated, a significant pressure reduction occurs under certain conditions, and the pressure of the solution drops to the saturated vapor pressure at that temperature. , the solution evaporates to form bubbles, which expand as a nucleus to create a cavity, which is then compressed to create a significant high pressure.In order to better cause cavitation, the cleaning solution is degassed. It is something.

When we confirmed the cleaning effect of this technology, it was found that the cleaning effect per unit time for the object to be cleaned was good.In other words, the cleaning time to obtain the specified cleaning effect for the same stain is short. Confirmed. This specific conventional technology generally includes a boiling tank downstream of the cleaning tank to degas the gas contained in the cleaning liquid, and a steam tank further downstream of the boiling tank. On the other hand, the ultrasonic cleaning device has a recovery tank disposed upstream of the cleaning tank, and a steam condensing pipe and a water separator upstream of the boiling tank.

According to the above ultrasonic cleaning device, the cleaning liquid containing gas is continuously sent from the steam tank through the steam condensing pipe and the water separator to the boiling tank, which is a deaerator. Only the less soluble cleaning liquid below the boiling point is returned to the cleaning tank. By continuing this operation, only the cleaning liquid that has been deaerated as much as possible is left in the cleaning tank.

When the vibrator is activated to emit ultrasonic waves, the pressure of the cleaning liquid is reduced, and when it reaches the saturated vapor pressure at that temperature, it vaporizes and creates a cavity. Therefore, cavitation is likely to occur. By the way, after researching this conventional technology, it was confirmed that ideally it would be good to have a high temperature zone at the top of the cleaning tank where the temperature is close to the boiling temperature, and a low temperature zone at the bottom where the temperature is lower. It was also confirmed that the cleaning effect was greater by cleaning the workpiece within the above-mentioned low temperature zone.

In this conventional method, cleaning was performed under conditions suitable for cleaning, but a high-temperature zone and a low-temperature zone were not actively provided. That is, there is no disclosure regarding the high temperature zone and low temperature zone in the above-mentioned cleaning.

Therefore, an object of the present invention is to provide a means that can improve the deaeration effect of a cleaning liquid. In other words, the cleaning liquid degassed by the boiling tank is constantly formed with a film at the liquid temperature close to the boiling temperature at the upper end of the cleaning tank, which prevents gas from dissolving on the cleaning tank. is to provide.

Furthermore, it is an object of the present invention to provide a means that can further improve the cleaning effect. That is, the object of the present invention is to provide an ultrasonic cleaning device that can lower the temperature of the cleaning area in the cleaning tank by actively circulating the cleaning liquid in this cleaning area.

Furthermore, by circulating the cleaning liquid in the cleaning area in the cleaning tank, it is possible to lower the oil content etc. associated with cleaning, and as a result, provide an ultrasonic cleaning device that can further improve the cleaning effect. There is something to do.

[Means to be solved by the invention]

The present invention has the following technical means to achieve the above object. That is, to explain using the reference numerals used in the attached drawings corresponding to the embodiments, a cleaning tank, a cleaning liquid filled in the cleaning tank and used to immerse the object to be cleaned,
An ultrasonic cleaning device comprising an ultrasonic vibrator that emits ultrasonic waves to the cleaning liquid and an oscillator that operates the ultrasonic vibrator, the cleaning tank being configured to emit ultrasonic waves to the cleaning liquid in the cleaning tank. An ultrasonic cleaning device having a deaerator for degassing the gas contained in the cleaning liquid so as to properly generate cavitation in the cleaning liquid,
The above deaerator consists of a boiling tank, and this boiling tank is
In an ultrasonic cleaning device that is disposed on the supply side of the cleaning liquid to the cleaning tank and degass other dissolved gases whose boiling point is lower than the boiling point of the cleaning liquid; The cleaning liquid 7 flows into the upper end 15 of the cleaning tank 2 and forms a high temperature zone, and by immersing the workpiece in the cleaning tank 2, the cleaning liquid 7 overflowing from the high temperature zone is stored in the recovery tank 17. Circulation pipe 1
A recovery pipe 25 is disposed to circulate the cleaning liquid 7 in the cleaning tank 2 to the evaporation tank 4 through the cleaning tank 8, and furthermore, a recovery pipe 25 is provided in order to supply the cleaning liquid 7 in the cleaning tank 2 to the evaporation tank 4. An ultrasonic cleaning device characterized in that the lower part 19 of the tank is a low-temperature zone, and the collection pipe 25 is located at a workpiece immersion position that is approximately midway between the high-temperature zone of the upper end 15 of the cleaning tank and the lower low-temperature zone. It is.

[Effect]

According to the above configuration, the cleaning liquid 7 containing gas is continuously sent from the steam tank 4 via the steam condensing pipe 11 and the water separator 13 to the boiling tank 3 which is a deaerator. The dissolved gas having a lower boiling point than the cleaning liquid 7 and the cleaning liquid are separated, and the high temperature cleaning liquid 7 having low gas solubility, that is, deaerated, is supplied to the cleaning tank 2 . Then, the high-temperature cleaning liquid 7 forms a high-temperature zone at the upper end 15 of the cleaning tank 2, and prevents the gas above the cleaning tank 2 from dissolving.

Also, by immersing the workpiece in the cleaning tank 2, the cleaning liquid 7 forming the upper layer high temperature zone overflows by the volume of the workpiece, and the cleaning liquid 7 forms the upper layer high temperature zone.
It is forced to flow into the country. The cleaning liquid 7 that has flowed into the recovery tank 17 is supplied into the cleaning tank 2 through the circulation pipe 18. At this time, a low-temperature zone is formed inside the cleaning tank 2 with respect to the high-temperature zone 15 at the upper end of the cleaning tank 2.

By operating the vibrator 6 and emitting ultrasonic waves, the cleaning effect of the workpiece is further improved. In addition, oil generated during cleaning of the above-mentioned workpieces,
A collection pipe 25 is disposed in an area where a relatively large amount of water, etc. is contained, that is, a workpiece cleaning range between the high temperature zone and the low temperature zone, and this collection pipe 25 allows the workpiece to be cleaned in a region that contains a relatively large amount of oil, water, etc. A cleaning liquid 7 is supplied to the steam tank 4.

Further, in the low temperature zone formed by the circulation pipe 18 described above, a temperature control pipe 23 branched from the circulation pipe 18 is arranged below the circulation pipe 18. Therefore, the temperature in the low temperature zone can be set to the optimum temperature for constant cleaning.
In addition, relatively heavy substances such as oil from the workpiece generated when the workpiece is washed fall to the bottom side of the cleaning tank 2, and are contained in the high temperature zone formed at the upper end 15 of the cleaning tank 2. By supplying the cleaning liquid 7 that has not been removed to the low-temperature zone of the cleaning tank 2 through the circulation pipe 18, the content of oil and the like in the cleaning liquid 7 in the low-temperature zone can be relatively reduced.

〔Example〕

Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates an ultrasonic cleaning device, and this device 1 is composed of a cleaning tank 2, a boiling tank 3, a steam tank 4, and a steam condensing section 5.

The cleaning tank 2 consists of a single tank, and this cleaning tank 2
A piezoelectric ultrasonic transducer 6 connected to an oscillator (not shown) is disposed.

Further, the boiling tank 3 is disposed upstream of the cleaning liquid 7 supply side of the cleaning tank 2, and a heater 8 is piped to the boiling tank 3, and the cleaning liquid 7 is heated at a temperature near the boiling point.

In this example, an example of Freon 113 among various cleaning liquids 7 is shown.
Since the boiling point of No. 3 is 47.6°C, the boiling tank 3 is heated by the heater 8 and set at approximately 47°C. Therefore, dissolved gases having a boiling point lower than that of the chlorofluorocarbon 113, which is the cleaning liquid 7, are separated by boiling point separation.

Further, the steam tank 4 is disposed upstream of the cleaning liquid 7 supply side of the boiling tank 3, and a heater 9 is piped to the steam tank 4. The cleaning liquid 7 is heated and evaporated by the heater 9 to a temperature higher than its boiling point. A steam condensing section 5 around which a steam condensing pipe 11 is disposed is provided in the upper part 10 of the cleaning tank 2 and boiling tank 3 described above.

Cleaning liquid 7 condensed by the steam condensing section 5
is sent to the water separator 13 via the connecting pipe 12.
Then, water is separated by this water separator 13. The water separated at this time is mainly adhering water that has already adhered when the object to be cleaned (workpiece) is placed in the cleaning tank 2. The cleaning liquid 8 from which water has been separated by the water separator 13 is sent to the boiling tank 3 via the cleaning liquid introduction pipe 14. Then, only the cleaning liquid 7 separated by the boiling point separation is again supplied to the cleaning tank 2, and the high temperature cleaning liquid 7 near the boiling point forms a high temperature cleaning liquid 7 layer, ie, a high temperature zone, in the upper part 15 of the cleaning tank 2.

Therefore, since the high temperature zone at the upper end 15 of the cleaning tank 2 is at a high temperature near the boiling point of the cleaning liquid 7, this prevents other gases from being dissolved in the cleaning liquid 7 again, and prevents degassing in the cleaning tank 2. The effectiveness is improved, and the cleaning effect on the workpiece is also improved.

Further, an overflow recovery tank 17 is connected to the front portion 16 of the cleaning tank 2. The cleaning tank 2 is filled to the top with the cleaning liquid 7, so when a workpiece is loaded, the cleaning liquid 7 corresponding to the volume of the workpiece overflows, and this overflowing cleaning liquid is collected by the recovery tank 17. It is introduced into the lower part 19 of the cleaning tank 2 via a circulation pipe 18.

A circulation pump 20 is disposed in the circulation pipe 18, and a valve 21 is provided on the primary side of the circulation pump 20.
A filter and a cooler 22 (not shown) are further provided on the secondary side.

Therefore, a low temperature zone is formed in the lower part 19 of the cleaning tank 2, where the temperature of the cleaning liquid 7 is lower than that in the upper end part 15. Furthermore, a branched temperature control pipe 23 is installed between the circulation pipe 18 and the primary side valve 21 of the circulation pump 20, and the temperature control pipe 23 is installed at a position in the cleaning tank 2. It is located in the lower part 19, and is arranged at a position lower than the position of the circulation pipe 20. A temperature control valve 24 is disposed in this temperature control pipe 23.

Further, the cleaning liquid 7 in the workpiece cleaning area located between the high temperature zone in the upper part 15 and the low temperature zone in the lower part 19 of the cleaning tank 2 is transferred to the steam tank 4 through the recovery pipe 25.
The cleaning liquid 7 is heated and evaporated again by the heater 9 to a temperature above the boiling point.

The cleaning liquid 7 in the cleaning tank 2 is circulated by the pump 20 through the circulation pipe 18, and foreign matter (dust, deposits, oil), etc. in the cleaning liquid 7 is removed by a filter, and ultrasonic waves are applied to the cleaning liquid 7 by the cooler 22. The temperature of the cleaning liquid 7 is maintained constant by cooling the generated heat.

In addition, although the above-mentioned cleaning liquid 7 shows an example of Freon 113, it is possible to use a cleaning liquid other than Freon 113. That is, Freon 112, isopropyl alcohol (IPA), ethanol, methylene chloride, trichlorethylene, perchloroethylene, 111 trichloroethane, azeotropes thereof, water, and the like can also be used.

In this example, the cleaning tank 2 is a single tank, but it is also possible to use a plurality of tanks.

Next, an example of how this embodiment is used will be explained.

First, an object to be cleaned (workpiece) is placed in the cleaning tank 2, and the ultrasonic vibrator 6 is activated there to clean it. That is, the object to be cleaned (work) is transferred to the cleaning tank 2.
The cleaning liquid 7 in the cleaning tank 2 overflows, and the overflowing cleaning liquid 7 enters the recovery tank 17 and is introduced into the lower part 19 of the cleaning tank 2 via the circulation pipe 18.

Then, the cleaning liquid 7 in the interior of the cleaning tank 2, that is, in the cleaning area for cleaning the workpiece, is introduced into the steam tank 4 via the recovery pipe 25. The cleaning liquid 7 introduced into the steam tank 4 is heated by a heater 9, becomes vapor, and is returned to liquid form by a condensing pipe 11 of a vapor condensing section 5 located at an upper portion 10.

Then, it is introduced into a water separator 13 via a connecting pipe 12, and water is separated. The cleaning liquid 7 from which water has been separated is introduced into the boiling tank 3 via the cleaning liquid introduction pipe 14. At this time, the cleaning liquid 7 is heated by the heater 8 to separate the boiling point, and dissolved gases having a lower boiling point than the cleaning liquid 7 are degassed. Only the degassed cleaning liquid 7 is introduced into the cleaning tank 2.

In the above process, the cleaning liquid 7 degassed by the boiling tank 3 is heated to a temperature near the boiling point and introduced into the upper end 15 of the cleaning tank 2.
This layer, ie, the high temperature zone, prevents other gases (gases below the boiling point of the cleaning liquid 7) from dissolving in the cleaning tank 2. Therefore, cleaning tank 2
The degassing effect of the cleaning liquid 7 inside can be improved.

Further, when a workpiece is put into the cleaning tank 2, the cleaning tank 2 is introduced into the recovery tank 17 by overflow.
Cleaning is carried out by actively cooling the workpiece cleaning area in the cleaning tank 2 by introducing the cleaning liquid 7 in the high temperature zone located at the upper end 15 into the lower part 19 of the cleaning tank 2 through the circulation pipe 18. The effect can be improved. At this time, a predetermined temperature is maintained by a cooler 22 disposed in the circulation pipe 18.

Also, a temperature control pipe 2 branched from the circulation pipe 18
Since the piping position of No. 3 is lower than that of the circulation pipe 18, it is easier to control the temperature, and when the oil from cleaning the workpiece settles downward, it can be cleaning solution 7
By circulating the water, foreign matter such as oil can be removed by a filter or the like, and the temperature can be set to the optimum temperature for cleaning the workpiece.

In addition, between the workpiece cleaning area, that is, the high temperature zone 15 at the upper end and the low temperature zone 19 at the lower end of the cleaning tank 2,
A recovery pipe 25 is provided, and the cleaning liquid 7 is heated by ultrasonic waves during workpiece cleaning, and the cleaning liquid 7 containing foreign matter is introduced into the steam tank 4 via the recovery pipe 25 and separated by boiling point again.

As described above, in this example, the degassing effect of the cleaning liquid 7 is improved, that is, the degassing effect is improved by heating the cleaning liquid 7 to near the boiling point, and it is most suitable for cleaning the inside of the cleaning area of the workpiece. This makes it possible to actively control the temperature of the cleaning liquid 7 in the cleaning tank 2, which is contradictory in that the cleaning effect can be improved by maintaining the temperature at a lower temperature. Therefore, it is possible to make contradictory temperature changes of the cleaning liquid 7 itself and improve work efficiency.

Further, in this example, the cleaning liquid 7 in the cleaning tank 2 is circulated by the pump 20 through the circulation pipe 18, and foreign matter (dust, deposits, oil), etc. in the cleaning liquid 7 is removed by a filter, and at the same time, the cleaning liquid 7 is circulated by the pump 20 through the circulation pipe 18. By connecting 22, the heat generated by the ultrasonic waves is removed and the temperature is maintained at the optimum temperature for cleaning.
As a result, it is possible to improve the cavitation and improve the cleaning effect.

Further, in this example, the cleaning tank 2 is a single tank, but it is also possible to use a plurality of tanks. Furthermore, since the structure of the device 1 itself can be simplified, it can be made smaller and more space-saving, and in addition, even more space can be saved when the device 1 is used continuously. be.

Furthermore, relatively heavy substances such as oil on the workpiece generated when the workpiece is cleaned are lowered to the low temperature zone of the cleaning tank 2, and are removed from the oil contained in the high temperature zone formed at the upper end 15 of the cleaning tank 2. By circulating the unused cleaning liquid 7 through the circulation pipe 18 to the low temperature zone located at the bottom of the cleaning tank 2, the content of oil and the like in the cleaning liquid 7 in the low temperature zone can be relatively reduced.

[Effects of the Invention] As detailed above, it is possible to provide a means for improving the degassing effect of the cleaning liquid 7. That is,
The cleaning liquid 7 deaerated by the boiling tank 3 always forms a film at the liquid temperature close to the boiling temperature on the upper end 15 of the cleaning tank 2, so that dissolution of other gases on the cleaning tank 2 can be prevented. We can provide an ultrasonic cleaning device that can

Furthermore, it is possible to provide means for further improving the cleaning effect. In other words, an ultrasonic cleaning device is provided in which it is possible to lower the temperature in the cleaning area in the cleaning tank 2, and in particular, the temperature can be lowered by actively circulating the cleaning liquid 7 in this cleaning area. can.

Further, by circulating the cleaning liquid 7 in the cleaning area in the cleaning tank 2, it is possible to lower the oil content etc. associated with cleaning, and as a result, the cleaning effect can be further improved. It has various advantages such as being able to provide the following.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the present invention and are a configuration diagram of a cleaning device. In the figure, 2... washing tank, 3... boiling tank, 4...
Steam tank, 7...Cleaning liquid, 15...Upper end, 17...
...Recovery tank, 18...Circulation pipe, 19...Lower part, 20
... pump, 21 ... valve, 22 ... cooler,
23...temperature control tube, 25...recovery tube, respectively.

Claims (1)

[Claims] 1. A cleaning tank, a cleaning liquid filled in the cleaning tank and used to immerse an object to be cleaned, an ultrasonic vibrator for emitting ultrasonic waves to the cleaning liquid, and an ultrasonic vibrator for activating the ultrasonic vibrator. An ultrasonic cleaning device consisting of an oscillator, which is contained in the cleaning liquid so that when the cleaning tank emits ultrasonic waves to the cleaning liquid in the cleaning tank, cavitation can be generated in the cleaning liquid. An ultrasonic cleaning device having a degassing device for degassing gas, the degassing device comprising a boiling tank, the boiling tank being disposed on the supply side of the cleaning liquid to the cleaning tank, and In an ultrasonic cleaning device for degassing other dissolved gases lower than the boiling point of the cleaning liquid; the cleaning liquid 7 degassed by the boiling tank 3 flows into the upper end 15 of the cleaning tank 2 and is heated to a high temperature. By forming a zone and immersing the workpiece in the cleaning tank 2, the cleaning liquid 7 overflowing from the high temperature zone is stored in the recovery tank 17 and circulated to the cleaning tank 2 via the circulation pipe 18 for further cleaning. A recovery pipe 25 is provided to supply the cleaning liquid 7 in the tank 2 to the evaporation tank 4, and the circulation pipe 18 is located in the low temperature zone of the lower part 19 of the cleaning tank. An ultrasonic cleaning apparatus characterized in that the installation position is a work immersion position that is approximately midway between the high temperature zone at the upper end of the cleaning tank and the lower low temperature zone. 2. Claim 1, characterized in that the circulation pipe 18 is provided with a filtration filter, a cooler 22, and a pump 20, and a regulating valve 21 is provided on the primary side of the pump 20. The ultrasonic cleaning device described. 3 A temperature control pipe 23 having a temperature control valve 24 is disposed between the pump 20 and the valve 21 of the circulation pipe 18, and the temperature control pipe 23 is located at a position 19 below the circulation pipe 18 in the cleaning tank 2. 3. The ultrasonic cleaning device according to claim 2, wherein the ultrasonic cleaning device is provided with an ultrasonic cleaning device.