JPH0434948Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cleaning tank using Freon 112, and more particularly to a cleaning tank using Freon 112 that is controlled so that the Freon 112 does not solidify.

[Prior Art] As is well known, in the field of mechanical work, etc., solvent cleaning devices are used to clean dirt such as oil adhering to the surface of machined workpieces. There are various types of solvent cleaning devices of this type, and an ultrasonic cleaning device is known as one of them.

In this ultrasonic cleaning device, cleaning fluid is placed in a cleaning tank equipped with an ultrasonic vibrator, and the ultrasonic vibrations generated by the ultrasonic vibrator remove oil adhering to the surface of the object to be cleaned. It is designed to clean dirt such as dirt.

The above-mentioned cleaning fluid to be put into the cleaning tank is as follows:
Freon 112 and Freon 113 are well known, and Freon 113 has been conventionally used.

[Problems to be solved by the invention] The above-mentioned Freon 113 has a boiling point temperature of 47.57°C and a freezing point temperature of -35°C, so it has the advantage that it does not solidify even at room temperature and is easy to handle. but,
When Freon 113 is used as a cleaning fluid for ultrasonic cleaning, there is a problem with cavitation, and cleaning may not be performed satisfactorily.

On the other hand, with Freon 112, good cavitation can be obtained and the object to be cleaned can be efficiently cleaned. However, since Freon 112 has a boiling point temperature of 92.8°C and a freezing point temperature of 26°C, it usually solidifies at room temperature. This Freon
Once 112 is solidified in the pumps, filters, etc. in the piping system, it takes time to completely dissolve the inside. This makes it difficult to reuse,
In addition, if the pump is operated while the coagulated material is present in the pump system, the operation of the pump will be affected due to overload caused by clogging of the filter or the like.

The present invention has been developed in view of the above points, and its purpose is to provide a cleaning tank that can easily handle Freon 112 that is superior to ultrasonic cavitation.

[Means for solving the problems] 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, there is a cleaning tank that accommodates Freon 112, a valve for replenishing the cleaning tank with Freon 112 in a replenishment tank, a feeding pump,
Freon 112 with supply piping system equipped with filter
In the cleaning tank using the above Freon 112 cleaning tank,
Cleaning tank area 2 including replenishment tank 4 and supply piping system 6
8 in a semi-sealed state with the casing 27,
At least one of the cleaning tank 1, the replenishment tank 4, the supply piping system 6, and the cleaning tank area itself 28 in the casing 27 is provided with a heat-retaining means for constantly keeping the temperature above the melting point of the Freon 112. Equipped with Freon
This is a cleaning tank using 112.

[Function] Since the present invention consists of the above technical means, the fluorocarbon
A cleaning tank 1 that uses Freon 112, a replenishment tank 4 for storing Freon 112 for replenishment, and a supply piping system 6 for sending Freon 112 from this replenishment tank 4 to the cleaning tank 1, respectively. The temperature can be controlled to be above the melting point. This temperature control can be performed by controlling each of the cleaning tank 1, supply piping system 6, and replenishment tank 4 to a temperature higher than the melting point of Freon 112, or by controlling the cleaning tank 1, supply piping system 6, and replenishment tank 4 to a temperature higher than the melting point of Freon 112. Since the tank 4 is semi-sealed by the casing 27, the cleaning tank area 28 inside the casing 27 itself is heated and the cleaning tank 1, the supply piping system 6, and the replenishment tank 4 are heated with the fluorocarbon 112. It can be controlled above the melting point. Furthermore, each of the cleaning tank 1, the supply piping system 6, the replenishment tank 4, and the cleaning tank area 28 are constantly filled with Freon 112.
It is also possible to control the melting point temperature or higher.

[Embodiments] 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 a cleaning tank for ultrasonically cleaning objects to be cleaned, and inside there is an ultrasonic vibrator 2 for generating ultrasonic waves, and a cleaning fluid 3 to be put inside, that is,
A heater _H1 is provided to heat the Freon 112 to a temperature above its melting point. Reference numeral 4 denotes a replenishment tank, which stores fluorocarbon 112 to replenish the amount of fluorocarbon 112 in the cleaning tank 1 when it becomes low. This replenishment tank 4 is provided within a replenishment overheater 5, and is heated and melted by a heater _H4 provided within the replenishment overheater 5.

The cleaning tank 1 and the replenishment tank 4 are connected by a supply piping system 6, so that the fluorocarbon 112 in the replenishment tank 4 can be supplied into the cleaning tank 1 as required. This supply piping system 6 connects the cleaning tank 1 and the replenishment tank 4 with a supply pipe 7, and there are stop valves 8, 9, 1 in this supply pipe 7.
0 and 11, a pump P ₂ , and a filter 12 are interposed therebetween.

The cleaning tank 1 is connected with a steam generating tank 13 for steam cleaning the object to be cleaned, and is connected to the steam generating tank 13 through an overflow pipe 14. In this overflow pipe 14, when the object to be cleaned is put into the Freon 112 in the cleaning tank 1, the liquid level rises by the volume of the object to be cleaned, but the overflow pipe 14 overflows to the steam generation tank 13 side by this increased amount. It is connected in order to A heater H ₂ is provided in the steam generation tank 13 to evaporate the fluorocarbon 112 contained in the tank. Further, a liquid level control device 15 is connected to the steam generating tank 13 so that the liquid level in the tank can be adjusted.

A condenser 16 is provided above the cleaning tank 1 and the steam generator 13 to condense the Freon 112 vapor evaporated in the steam generator 13. A water separator 17 is connected to the condenser 16, and the water contained in the freon 112 condensed in the condenser 16 is separated therefrom. The Freon 112 from which the water has been separated is returned to the cleaning tank 1 via the return pipe 18, and the separated water is returned to the drain pipe 1.
7a is designed to flow outside.

Condensing pipe 19 disposed within the condenser 16
The server tank 21 is connected to the cooling water pipe 20 via the cooling water pipe 20.
The cooling water 22 contained therein can be circulated and supplied. This cooling water pipe 20 includes a pump P ₁ , a flow path switching solenoid valve 23,
A heat exchanger 24 and stop valves 25 and 26 are provided.

The cleaning tank 1, steam generation tank 13, supply piping system 6, replenishment tank 4, and water separator 17 are semi-sealed with a casing 27 made of a heat insulating material, and the inside of the casing 27 is a cleaning tank area. It is divided as 28. A heat exchanger 29 is disposed within this cleaning tank area 28, and this heat exchanger 29
A hot water pipe 30 is connected to the hot water pipe 30 . One end of the hot water pipe 30 is connected to the electromagnetic valve 23 , the other end is connected to the reserve tank 21 , and the heat exchanger 29 is connected to the reserve tank 21 .
The cooling water 22 contained in the cooling water 1 can be circulated. And heat exchanger 2
A heater H ₃ is disposed within the reserve tank 21 so that when sending the cooling water 22 to the side 9, the cooling water can be heated to make it hot before being sent.

Next, T ₁ is a thermocouple disposed on the inlet side of a pump P ₂ which is disposed in the supply piping system 6, and T ₂ is also disposed in the supply piping system. Filter 12
T ₃ is a thermocouple installed in the water separator 1
This is a thermocouple arranged at 7. These thermocouples T ₁ ,
T ₂ and T ₃ are provided to heat the insides of the pump P ₂ , filter 12, and water separator 17 to a temperature higher than the melting point of the Freon 112, respectively.

The cleaning tank 1 and the steam generation tank 13 are connected to the supply pipe 7 between the replenishment tank 2 and the pump P ₂ through recovery pipes 31 and 32, respectively. By opening the stop valves 33 and 34 provided therein, the fluorocarbon 112 contained therein can be collected into the replenishment tank 4.

Further, a discharge pipe 35 is branched from the supply pipe 7 on the downstream side of the pump _P2 , and stop valves 36 and 37 are interposed in this discharge pipe 35.

Next, the operation of the above embodiment will be explained.

When the cleaning tank is not in operation, the heater _H3 disposed in the reserve tank 21 is energized, and the cooling water 22 in the tank 21 is heated to become hot water. Also, at this time, solenoid valve 2
3 is switched to send hot water to the heat exchanger 29 side. Therefore, when the pump P ₁ for circulating cold water operates, the cooling water 22 heated in the reserve tank 21 becomes hot water, and the water reaches the point indicated by the arrow 38 in the figure.
It cycles like this. Since hot water is supplied to the heat exchanger 29 as described above, the air 39 passing therethrough is heated. This warmed air 39 flows through the cleaning tank area 28 and
Overheat the inside. For this reason, for example, if the water temperature in the reserve tank 21 is heated to 30°C or higher, the temperature in the cleaning tank area 28 can be controlled to 26°C or higher, which is the freezing point temperature of the Freon 112. can.

When this is operated, electricity is applied to thermocouples T ₁ , T ₂ , and T ₃ disposed in each of the pump P ₂ , filter 12, and water separator 17 to heat each one. Near the impeller of pump P ₂ and filter 1
2 cannot operate unless the temperature at the center of the fluorocarbon 112 is higher than the freezing point of the fluorocarbon 112, but even when the operation is stopped, the temperature of the cleaning tank area 28 itself is controlled to be higher than the freezing point of the fluorocarbon 112. You can resume driving immediately. Whether operation is possible is confirmed by checking whether the temperature of the thermocouple _T3 installed in the water separator 17 is higher than the freezing point of the Freon 112. When operation becomes possible, the heaters H ₁ and H ₂ are energized to raise the temperatures in the cleaning tank 1 and the steam generation tank 13. When the temperature inside these tanks exceeds, for example, 30° C., the electromagnetic valve 23 is switched and the energization of the heater H ₃ is stopped. Reserve tank 21
The water 22 inside is sent to the condenser 16 side by the pump 1, passes through the heat exchanger 24, and returns to the reserve tank 2.
It will return to 1. Then, when passing through the heat exchanger 24, it is cooled.

This brings the device into operation, and the object to be cleaned is placed in the cleaning tank 1 and subjected to ultrasonic cleaning. Cleaning tank 1
Since Freon 112 is placed inside, cavitation can be generated well and ultrasonic cleaning can be performed efficiently. When the object to be cleaned is put into the cleaning tank 1, the amount of freon 112 corresponding to the volume of the object to be cleaned overflows into the steam generation tank 13 via the overflow pipe 14.

The cleaning object that has been ultrasonically cleaned in the cleaning tank 1 is then steam cleaned in the steam generation tank 13. The vapor of the Freon 112 that has steam-cleaned the object to be cleaned enters the condenser 16 as shown by arrow 40, where it is cooled and condensed. The condensed Freon 112 enters the water separator 17 as shown by arrow 41, where the Freon 112
The water contained inside is separated. The fluorocarbon 112 from which water has been separated is returned to the cleaning tank 1 through the return pipe 18. When washing tank 1 contains the object to be cleaned, the amount of freon that is equal to the volume of the object to be cleaned is filled.
112 overflows to the steam generation tank 13 side,
That amount is returned from the water separator 17 side. Since the returned Freon 112 is once evaporated and then cooled and condensed, it does not contain dirt such as oil removed from the object to be cleaned. Therefore, the concentration of contamination in the cleaning tank 1 is always kept constant. It can be kept below the value. If there is a shortage of Freon 112 during operation in this way, the heater H ₄ of the replenishment superheater warms the Freon 112 contained in the replenishment tank 4, and after it is dissolved, the pump is pumped. _P2 is used to suck it up and send it to cleaning tank 1.

When the cleaning is completed and the operation is stopped, the power supply to the heaters H ₁ and H ₂ is stopped. Then, the solenoid valve 23 is automatically switched, and the reserve tank 2
Heater _H3 in 1 is energized, and heat exchanger 29 is heated.
As hot water of 30° C. or higher is supplied, the entire cleaning tank area 28 is controlled to a temperature higher than the melting point temperature of the Freon 112 as described above.

The above is an example in which the cleaning tank area 28 itself is controlled to a temperature higher than the melting point of the fluorocarbon 112. However, in this way, the cleaning tank area 28 itself is
Cleaning tank 1, without controlling the temperature above the melting point of
Each of the generation tank 13, replenishment tank 4, supply piping system 6, and water separator 17 is connected to the melting point of Freon 112 using heaters H ₁ , H ₂ , H ₄ and thermocouples T ₁ , T ₂ , T ₃ , etc. The temperature may be controlled to be higher than the temperature.

Further, the temperature of both the cleaning tank area 28 itself, the cleaning tank 1, the generation tank 13, the replenishment tank 4, the supply piping system 6, and the water separator 17 may be controlled to be higher than the melting point temperature of the Freon 112. .

[Effects of the invention] As detailed above, the present invention makes the cleaning tank area 28 including the cleaning tank 1, the replenishment tank 4, and the supply piping system 6 semi-sealed by the casing 27. , the replenishment tank 4, the supply piping system 6 individually, or the cleaning tank area itself within the casing 27,
Alternatively, the cleaning tank 1, the replenishment tank 4, the supply piping system 6, and both the cleaning tank area 28 are controlled to a temperature higher than the melting point temperature of the fluorocarbon 112, so that the fluorocarbon 112 is not solidified. can be handled. Therefore, there are various advantages such as providing a cleaning tank using Freon 112 that can easily perform cleaning using Freon 112 and perform efficient cleaning.

[Brief explanation of the drawing]

The accompanying drawings are block diagrams showing one embodiment of the present invention. In addition, in the figure 1...Cleaning tank, 4...Replenishment tank,
6... Supply piping system, 13... Steam generation tank, 17...
. . . water separator, 27 . . . casing, 28 . . . washing tank area, respectively.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cleaning tank that accommodates Freon 112, and a supply piping system equipped with a valve, a feed pump, and a filter for replenishing the cleaning tank with Freon 112 in the replenishment tank. In the cleaning tank using the Freon 112, the cleaning tank area 28 including the cleaning tank 1, the replenishment tank 4, and the supply piping system 6 is semi-sealed by the casing 27, and at least the above-mentioned Cleaning tank 1, replenishment tank 4, supply piping system 6
A cleaning tank using Freon 112, characterized in that it is equipped with a heat-retaining means for constantly keeping one of the cleaning tank area 28 itself in the casing at a temperature equal to or higher than the melting point of Freon 112. (2) When the cleaning tank is not in use, the heating means is heated air 39.
A heat exchanger 29 for feeding and keeping the cleaning tank area 28 itself at a temperature higher than the melting point of Freon 112
and a heater H ₁ , thermocouples T ₁ , T ₂ , etc. to keep the cleaning tank 1, replenishment tank 4, and supply piping system 6 at a temperature higher than the melting point of Freon 112 when the cleaning tank is used. The fluorocarbon as set forth in claim 1 of the utility model registration claim, characterized in that the fluorocarbon is composed of
Cleaning tank using 112. (3) Cleaning using Freon 112 according to claim 1 of the utility model registration claim, characterized in that there is a water separator 17 and a steam generation tank 13, which are also provided in the cleaning tank area 28. Tank.