JPH0248087A - Washing device - Google Patents

Abstract

PURPOSE:To allow taking out of a material to be washed to the outside after a solvent is completely removed from the material by measuring the temp. of the material in the outlet of a case having a washing tank and prohibiting the ejection of the material to the outside before a temp. attain a set temp. CONSTITUTION:The temp. of the material to be washed is measured and whether the temp. exceeds the prescribed temp., for example, the b.p. of the solvent or not is decided at the time of ejecting the material 7 to be washed to the outside from the 3rd washing tank 2C on the outlet side. A control section 12 which controls the operation of a transporting mechanism 11 transports the material 7 as it is to the outside when the temp. of the material 7 exceed the prescribed temp. and further, stagnates the material in the 3rd washing tank 2 when the temp. is not exceeded. The transportation of the material to be washed to the outside is stopped during this time. The taking out of the material 7 kept stuck with the solvent 3 to the outside is surely prevented in this way and the max. possible washing effect is exhibited. The good washing effect is thus obtd. and the leakage of the solvent 3 in the outside case 1 to the outside is entirely prevent.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a cleaning device that can completely remove and take out a solvent from an object to be cleaned.

(Technical Background of the Invention and Problems Thereof) Conventionally, cleaning devices that use, for example, Freon as a solvent, have been frequently used. This kind of Freon cleaning equipment can efficiently clean minute deposits, dirt, etc. while keeping the object being cleaned scientifically, and is particularly effective in cleaning precision equipment and parts such as electronic equipment without damaging the insulation properties. Various methods such as boiling cleaning, ultrasonic cleaning, and steam cleaning are used in practice.

FIG. 4 is a perspective view showing one side of such a fluorocarbon cleaning device. For example, three cleaning tanks 2a,
2b and 2C are provided, and each has a solvent, that is, Freon 3.
The first storage tank 2a performs boiling cleaning, the second storage tank 2b performs ultrasonic cleaning, and the third storage tank 2C performs steam cleaning.

Cooling coils 4- are disposed on the upper surface of the outer periphery of each cleaning tank 2a, 2b, and 2C so as not to obstruct the loading and unloading of objects to be cleaned (not shown), and the refrigerant is allowed to flow through the coils to cool and condense the vaporized fluorocarbons. It is then collected and returned to the cleaning tank 2.

In addition, since such a device is designed to carry out exhaustion as a safety measure for workers, the residue from which fluorocarbon has been removed is exhausted from the exhaust pipe 5 as clean air.

Inlet/exit ports 6 are provided on both sides of the case 1 for taking in and out the items to be cleaned.

Therefore, the object to be cleaned (injected into the case 1 from the entrance/exit 6) is first washed by boiling in the first washing tank 2a, and then washed in the second washing tank 2a.
Ultrasonic cleaning is carried out in the cleaning tank 2b, and then in the third cleaning tank 2C.
After cleaning with steam, it is transported out of the case 1 through the entrance/exit 6.

In addition, when performing steam cleaning, the temperature of the object to be cleaned is initially lower than the evaporation temperature of the solvent, and the solvent vapor condenses on the surface of the object, condensing dirt there and dropping it into the tank. I try to wash it.

Therefore, when the steam cleaning in the third cleaning tank 2c is finished, if the object to be cleaned is heated to a temperature higher than the boiling point of Freon, the solvent that has adhered to the surface will evaporate. Is there any problem in taking the object to be cleaned outside, and at what temperature? 1. If the temperature is lower than the boiling point, the object to be cleaned will be taken out with the liquid phase of Freon, which aggregates dirt, attached to it. For this reason, the cleaning effect cannot be achieved,
Furthermore, if the consumption of fluorocarbons increases, it will pollute the environment.

However, the object to be cleaned 7 may have a relatively large volume as shown in FIG. 5, or a relatively small volume as shown in FIG. 6, and the shape is not constant. 8 for gripping and conveying.
Therefore, if the residence time in the third cleaning tank 2c is kept constant and the cleaning is carried out for a minimum time, if the object to be cleaned has a relatively large volume as shown in FIG. If the solvent is not heated to a temperature of

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cleaning device that can completely remove the solvent from the object to be cleaned and then take it out. .

(Summary of the Invention) The present invention is an apparatus for cleaning an object to be cleaned with a solvent in a closed case, in which an outlet for the object to be cleaned is provided on at least one side of the case, and the solvent is stored in the case to remove the object to be cleaned. A cleaning tank for cleaning is provided, and the objects to be cleaned carried into this case are sequentially transported to the washing tank by a conveyance mechanism, and a temperature measuring mechanism is installed to measure the temperature of the objects to be cleaned at the outlet of the case. This feature is characterized in that the object to be cleaned is not carried out to the outside until the measured temperature reaches a predetermined temperature.

(Example) Hereinafter, an example of the present invention will be described in detail, taking as an example an apparatus using Freon as a solvent, with reference to a perspective view showing an overview of the entire apparatus in FIG.

Note that the same parts as in FIG. 4 are given the same reference numerals and their explanations will be omitted.

That is, the object to be cleaned 7 carried into the case 1 is held by a handle 8, and this handle 8 is provided so as to be movable within the case 1 along a predetermined path by the conveyance mechanism 11, and the object to be cleaned 7 is moved for each cleaning. They are sequentially moved to tanks 2a, 2b, and 2c to perform boiling cleaning, ultrasonic cleaning, and steam cleaning, respectively. As shown in FIG. 2, a temperature sensor of a temperature measuring mechanism 12 is attached to the handle 8 to maintain thermal connection while holding the object 7 to be cleaned and to measure its temperature.

When the object to be cleaned 7 is carried out from the third cleaning tank 2c on the outlet side, the temperature of the object to be cleaned is measured and whether this temperature exceeds a predetermined temperature, for example, the boiling point of the solvent. Determine whether or not. Then, the temperature of the object 7 to be cleaned is a predetermined temperature,
For example, if the solvent 3 is chlorofluorocarbon and the temperature exceeds 47.5°C, the control unit 12 that controls the operation of the transport mechanism 11 will
The object to be cleaned 7 is directly conveyed to the outside, and if the temperature does not exceed the above temperature, it is further retained in the third cleaning tank 2c to be heated, and during this period, the conveyance of the object to the outside is stopped.

With such a configuration, the control unit 12 can control the transport mechanism 11 to sequentially wash the object 7 transported into the case 1 in the washing tanks 2a, 2b, and 2c.

Then, when the cleaning work is finished and the object to be cleaned 7 is taken out from the case 1, the temperature of the object to be cleaned 7 is measured to confirm that it exceeds the boiling point of the solvent 3. It is possible to reliably prevent the object 7 to be cleaned to which the solvent 3 remains attached from being taken out to the outside, and thereby the maximum cleaning effect can be exhibited.

Therefore, a good cleaning effect can be obtained, and the solvent 3 inside the outer case 1 will not leak to the outside at all, so that no fluorocarbon will be consumed and the environment will not be polluted.

Note that the present invention is not limited to the above embodiments,
For example, it goes without saying that chlorine-based trichloroethane, other organic solvents such as benzene and methanol, etc. can be used as appropriate.

Further, in the above embodiment, a temperature measuring mechanism is attached to the handle 8 that grips the object to be cleaned, but for example, as shown in FIG. A contact 13 may be provided in advance on the handle 8 side and can be freely connected to and separated from the thermocouple, and the temperature of the object to be cleaned 7 may be measured from an electrical signal obtained through the contact 13.

(Effects of the Invention) As detailed above, according to the present invention, the solvent attached to the object to be cleaned can be completely evaporated when the object to be cleaned is taken out after cleaning with a simple configuration. It is possible to provide a cleaning device that can maximize the cleaning effect and prevent environmental pollution without consuming solvent.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention, Figs. 2 and 3 are front views showing main parts of each of the above embodiments, and Fig. 4 is a diagram of a conventional cleaning device. A perspective view showing the side, FIG.
FIG. 6 is a diagram showing the state of conveyance of objects to be cleaned in a conventional cleaning device. 1, 2, 3, 6, 7, 8, Case, Cleaning tank, Solvent (Freon), Entrance/exit, Handle for items to be cleaned, Transport mechanism, Temperature measurement mechanism

Claims (1)

[Claims] A device for cleaning an object to be cleaned with a solvent in a closed case, comprising: a closed case; an inlet/outlet for the object to be cleaned provided on at least one side of the case; A cleaning tank for storing and cleaning objects to be cleaned; a conveying mechanism for conveying the objects carried into the case; and a temperature measuring device for measuring the temperature of the objects to be cleaned when the objects are carried out from the outlet of the case. A cleaning device comprising: a mechanism; and a control unit that stops carrying out the object to be cleaned outside until the temperature detected by the temperature measuring mechanism exceeds a predetermined temperature.