JPS6284800A - Dry cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dry cleaner that is effective in cooling and recovering solvents.

(Prior Art) A conventional dry cleaning process will be explained with reference to FIG. In Figure 2, clothing 2 is put in through door 1, and
After closing and starting operation, the steps generally proceed in the following order.

■, Solvent 4 from solvent tank 3 (Solvent is R11-3, perchlorethylene, 1.1.1-) +) Chronent
x tank, etc.) is pumped up by a pump 6 through a valve 5, and the required amount of the solvent 4 is sent into a processing tank 10 through a path consisting of a valve 7 and a filter 8 or a path consisting of a valve 9.

■, When the processing drum 11 is rotated slowly, the clothes are removed from the drum 1.
1 is successively lifted up and dropped by a crosspiece 11' provided on the inner wall of the tank 1, receiving the effect of washing and discharging the solvent 4 into the processing tank 10, button trap 12, valve 13,
Clothes 2 are washed by circulation in a circuit consisting of pump 6, valve 7, filter 8 or valve 9.

■After cleaning, the solvent used for cleaning is transferred to the treatment tank 10.
Button trap 12, valve 13, pump 6, valve 1
The liquid is drained to the distiller 15 through route 4. Subsequently, the processing drum 11 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2 and drain it in the same manner.

■, Next, repeat the steps in paragraphs ■ and 0 to rinse the clothing.

After the rinsing process is completed, the liquid is drained into the solvent tank 3 via the processing tank 10, button trap 12, valve 13, and valve 5, and then the processing drum 11 rotates at high speed to remove the solvent in the clothing 2. 4 was centrifuged, and the solvent tank 3 was also centrifuged.
Drain the fluid.

When the cleaning process ends with 00 or more, the processing drum 11
slowly turn the fan 16, air cooler (condenser) 1
7. Air is circulated between the recovery air duct 19 containing a built-in air heater (heater) and the processing tank 10 in the direction of the arrow 20 while controlling the temperature to be optimal according to the clothing material using a thermostat (not shown). Dry clothing 2. The solvent gas evaporated from the clothing 2 is condensed in the air cooler 17, enters the water separator 22 through the recovery path 21, and enters the Tallinn tank 24 through the solvent pipe 23.

(2) When the drying is completed, the dampers 25 and 26 open as shown by the broken lines, and fresh air (outside air) is taken in from the damper 25, and uncondensed solvent gas that cannot be recovered by the air cooler 17 is exhausted from the damper 26. Explain the smell of solvent.

The solvent 4 that entered the distiller 15 in the process of item 0.0 is evaporated and condensed and recovered in the condenser 27, and the water is collected in the distiller 22.
, passes through the solvent pipe 23 and enters the cleaning 24,
It returns to the solvent tank 3 from the partition slope 28 with overflow. Note that the water separated by the water separator 22 is discharged to the outside of the system through a water pipe 29. Further, water flows through the cooling water vibrator 31, and the temperature of the liquid in the tank is cooled by the cooling coils 32, 32'.

Clothes that are dry cleaned have become more diverse and fashionable, and come in a variety of materials, dyes, etc. When these clothes are washed with high temperature solvents, the following problems occur.

(2) Since the melting characteristics are temperature dependent, uneven color fading (colorless unevenness) occurs more frequently when dyeing.

■Water-retaining properties decrease and clothing tends to shrink more.

■Plastic materials tend to melt or crack.

In the conventional apparatus shown in FIG. 2, the condenser 27 is water-cooled, and the gas evaporated in the distiller 15 is condensed and liquefied. On the other hand, in the drying process, the air cooler 17 is water-cooled to condense and liquefy the solvent evaporated from the clothing. In both cases, the cooling temperature is dependent on the water temperature, so it is seasonal, and the solvent temperature in summer is as high as 40° C. or higher, causing the above-mentioned problems.

In addition, as cooling means, methods such as attaching cooling coils 32 and 32゛ inside the tank and supplying chiller water to lower the cooling water temperature have been used, but these methods are expensive and ineffective. There were some aspects that were inadequate.

On the other hand, the solvent temperature during cleaning increases by 5 to 10°C relative to the temperature in the solvent tank 3. The reason is that the temperature of the processing tank 10, which rose during drying, drops only to about 50°C by the next process, and when cleaning begins in the next process, the specific heat of the solvent drops to 0.
Since the temperature is about 2Kcal/kg'c, the temperature is easily raised due to residual sensible heat in the processing tank. Therefore, countermeasures include lowering the sensible heat of the device and lowering the liquid temperature in the solvent tank 3. However, as described above, conventional devices have insufficient countermeasures.

Statistically, discoloration, fading, and shrinkage account for approximately 32% of clothing accidents, and it is known empirically and experimentally that one of the factors is greatly influenced by the temperature of the solvent during washing. However, a dry cleaner with the function of controlling the solvent temperature within a certain range has not appeared on the market. However, even if clothing accidents are caused by liquid temperature, There was a problem where the cause could not be determined by either the cleaning company or the clothing manufacturer.

(Problems to be Solved by the Invention) The present invention solves the problem of uneven color fading in conventional dry cleaners.
This is intended to solve problems such as shrinkage and cracks in clothing.

(Means for Solving the Problems) Therefore, the present invention provides a processing tank in which a solvent circulation circuit and a drying air circulation circuit are connected to wash clothing with a solvent and dry the washed clothing with dry air. In the dry cleaner, a cooler is provided in the solvent circulation circuit below the processing tank, and the dry air circulation circuit is provided to reach the upper part of the processing tank via the cooler, and the dry air is condensed in the cooler. The solvent recovery route is connected to the solvent tank, and this is used as a means to solve the problem.

(Function) The solvent is circulated in the solvent circulation circuit to wash the clothing in the processing tank, and the solvent gas evaporated from the clothing in the processing tank is condensed in the cooler and collected in the solvent tank in the recovery path. Next, after the solvent is drained, dry air is circulated in a circulation circuit that passes through a cooler and reaches the upper part of the processing tank to dry the clothes, and the solvent gas that reaches a certain concentration is condensed in the cooler and collected.

(Example) An example of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the layout of the main parts of the dry cleaner of the present invention. In Figure 1, a button trap 12 is placed in the liquid circulation circuit.
A is disposed at the bottom of the processing tank 10, and an evaporator (hereinafter referred to as cooler) 17a of a refrigerator is disposed beside or below it. In addition, in the liquid absorption step in which a cooling jacket 40 is provided on the outer wall of the processing tank 10, first the valves 13 and 14 are closed, and then the valve 5.
7 or open 9). When the pump 6 is turned on, the solvent 4 is sucked from the solvent tank 3 and flows into the processing tank 10. When the liquid level reaches a specified level using a liquid level control switch (not shown), the pump 6 is stopped. Note that, prior to the liquid absorption process, cooling water is passed through the cooling jacket 40 of the processing tank, and the processing tank 10
to cool down.

In the next cleaning step, when the valve 5.14 is closed, the solvent flow is directed to the treatment tank 10, the button trap 12a1 and the cooler 17.
Cleaning continues by circulating through valve 13, pump 6, and valve 9 (or valve 7 and filter 8), but at this time, since the solvent 4 is cooled by the cooler 17a, the solvent increases due to the sensible heat of the equipment during cleaning. While keeping the temperature low and eliminating problems with the clothing 2, solvents with high vapor pressure such as R113 create bubbles when the temperature rises, and cavitation reduces the circulating flow rate of the pump 6, reducing cleaning performance. Such problems will disappear. Note that the solvent temperature is adjusted to the optimum temperature depending on the clothing material by a not-shown thermostat built into the solvent circulation circuit.

In the draining process, the solvent may be returned to the tank 3, or the solvent may be returned to the distiller 15.

In the drying process, the fan 16a rotates, the dampers 25 and 26 are in a solid line state, and the air flow is controlled by the fan 16a and the air heater 18a.
The air enters the processing tank 10 through the first damper 26a, contacts the clothing 2, and flows like an air stream 20a. button trap 12a
The foreign matter is captured by the cooler 17a and cooled by the cooler 17a. The solvent gas that has reached a certain concentration is condensed and liquefied in the cooler 17a. The liquefied liquid flows into the clean tank 24 through the valve 31a. Although there is condensed water during drying, the amount is small, so there is no problem even if it is directly poured into the clean tank 24. Of course, since the water is stored as water 30 in the clean tank 24, it is necessary to drain it periodically. Note that the water separator 22 may be provided at the bottom of the layer L-L, and the solvent and water during drying may be introduced to the water separator 22. In the figure, 11 is a processing drum, 11' is a crosspiece, 19a is a cover air duct, 21a is a recovery route, 23 is a solvent pipe, 25a is a damper, 27 is a condenser, 28 is a partition slope with an overflow, and 29 is a water pipe. .

Now, before the cleaning process, the jacket 4 on the outer wall of the treatment tank 10
Cooling water is passed through the tank 10 to remove the sensible heat of the processing tank 10 that has risen in temperature during the drying process, thereby suppressing the rise in solvent temperature during the cleaning process. Furthermore, by providing the cooler 17a in the solvent circulation circuit, the solvent that has come into contact with the processing tank 10 and has risen in temperature can be efficiently cooled during the cleaning process.

When the cleaning process is completed and the drying process begins, the circulation of the solvent is stopped and an air flow is created by the rotation of the drying fan 16a, but the flow path circulates through the processing tank 10, button trap 12a, cooler 17a, fan 16a, and heater taa. , the solvent gas evaporated from the clothing 2 in the processing tank 10 is transferred to the cooler 1.
It is condensed and recovered at 7a. That is, one cooler 17a
The solvent is cooled and the solvent is recovered.

In the actual machine, the cooler 17a needs to be placed at the bottom of the processing tank 10 due to solvent cooling, and since the specific gravity of the solvent gas evaporated during drying reaches 4 to 5 times that of air, the concentration is high at the bottom, and the concentration difference In the case of a condensation recovery method, efficient condensation recovery is possible. Furthermore, since highly concentrated gas is recovered at the bottom, the capacity of the solvent gas circulation fan 16a can be reduced, contributing to energy savings.

In addition, in order to efficiently collect the water at the bottom of the processing tank 10,
The concentration of solvent gas inside 0 is small. In the case of the type of solvent (for example, Freon R113, etc.), it is also possible to omit the deodorizing step after drying. In addition, by cooling the solvent, R11
In the case of a solvent with a low boiling point and high vapor pressure, such as No. 3,
This can improve the problem that cavitation occurs in the pump due to temperature rise and the capacity decreases.

(Effects of the Invention) The present invention is configured as described in detail above, and a single cooler cools the solvent during cleaning and condenses the solvent gas during drying, thereby reducing costs. I can do it. In addition, by placing a cooler in the solvent circulation path, the solvent is efficiently cooled during circulation, cleaning at a constant temperature is easier to control, and the solvent is cooled and guided to the pump.
Prevents pump capacity from decreasing due to cavitation.

Therefore, clothing accidents caused by the temperature of the solvent can be prevented.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a dry cleaner showing an embodiment of the present invention, and FIG. 2 is a system diagram of a conventional dry cleaner. Explanation of the main parts of the figure 2...Clothing 3--Solvent tank 4-Solvent 6-Pump 10--Processing tank 12a--Button trap 16a--Fan 17a--Cooler 18a--Heater 19a-- Recovery air duct 21a - Recovery paths 25a, 26a - Damper Patent applicant Mitsubishi Heavy Industries, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a dry cleaner having a processing tank which connects a solvent circulation circuit and a dry air circulation circuit and washes clothing with a solvent and dries the washed clothing with dry air, the solvent circulation circuit below the processing tank is A dryer is provided with a cooler, the circulation circuit for the dry air is provided to reach the upper part of the processing tank via the cooler, and a recovery route for the solvent condensed in the cooler is connected to a solvent tank. Cleaner.