JPH07157B2 - Purifier for dry cleaning liquid - Google Patents

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 dry cleaning liquid used in a dry cleaning machine.

[0002]

2. Description of the Related Art Conventionally, in a dry cleaning machine for washing clothes, a dry cleaning liquid is used as a washing liquid. In this dry cleaning machine, the dry cleaning liquid is pumped from the liquid storage tank by a pump and sent to the washing tank, poured into the rotating drum, and the laundry is agitated with the rotating drum to be washed, and the dirty dry cleaning liquid is again stored in the liquid storage tank. It is operated around the circulation system that is returned. A filter is provided in the circulation system of the dry cleaning liquid, and the solid content in the liquid is filtered by this filter for use. The dry cleaning liquid used in such a dry cleaning machine is generally petroleum naphtha having a narrow and limited boiling range.

[0003]

Since the dry cleaning liquid circulated and used in the conventional method is repeatedly used, the fine dirt particles released from the laundry are collected by the filter provided in the circulation system, It is filtered and supplied to the washing tub as a clean liquid. However, the dry cleaning liquid gradually becomes difficult to filter, and the fine particles are sent to the washing tub as it is, and eventually become dirty and unusable. Further, there is a problem that the filter in the circulation system is also likely to be clogged, the pumping ability by the pump is lowered, the operating ability is lowered, and the period of use of the dry cleaning liquid is shortened.

Since the dry cleaning liquid to be handled is a low boiling point combustible liquid, it cannot be discharged unnecessarily to the sewer because it is contaminated, and there is a problem in terminating the waste liquid of the dry cleaning liquid. .

The present invention solves such problems and
It is an object of the present invention to provide a purifying device for a dry cleaning liquid that can be circulated for a long period of time by incorporating a purifying means that uses ozone in a dry cleaning liquid circulation system in a dry cleaning machine.

[0006]

In order to achieve such an object, the present invention provides a dry cleaning liquid circulating system in a dry cleaning machine at an appropriate position between the discharge side of the washing tub and the liquid circulating pump. An aeration unit is provided, and the dry cleaning liquid is aerated by ozone supplied from the ozone generator in the aeration unit, and cooling means for the dry cleaning liquid is arranged between the liquid storage tank and the washing tub. It is characterized by

[0007]

According to the present invention thus constructed, the dry cleaning liquid which has been sent from the liquid storage tank to the washing tank by the liquid circulation pump and finished the washing operation is returned to the liquid storage tank and then to the circulation pump. Until it is pumped up and sent again to the washing tub, the aeration section is subjected to aeration operation with ozone. Therefore, dirt particles released from the laundry by the washing operation and the dirt particles resulting from the binding of the detergent are aggregated by the strong oxidizing action of the active oxygen dissolved in the liquid in the aeration section, and are accumulated in the storage tank. The waste fine particles transferred into the dry cleaning liquid are aggregated and settled to be separable. At the same time, the purification function is enhanced by sterilization and bleaching due to the strong oxidizing action of active oxygen. Therefore, a liquid having a small amount of suspended fine dirt particles can be filtered with a filter by a liquid circulation pump and supplied to the washing tub as a clear liquid. together,
The filtering effect of the filter can be maintained and the dry cleaning liquid can be used for a long period of time. Further, by keeping the dry cleaning liquid at an appropriate temperature by the cooling means, it is possible to prevent vaporization and to keep the liquid temperature suitable for the washing operation, so that the consumption of the liquid can be kept to the minimum.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the dry cleaning liquid purifying apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a flow chart showing an outline of a dry cleaning liquid purification apparatus of the present invention. FIG. 2 is a sectional view showing an example of the liquid cooler.

In these drawings, a washing machine 1 has a washing tub 3 of a known structure arranged on a liquid storage tub 2 serving as a base, and a liquid supply line for a dry cleaning liquid supplied to the washing tub 3. Reference numeral 8 is connected to the upper liquid supply port 3a of the washing tub 3 from the liquid circulation pump 4 mounted on the upper part of the liquid storage tub 2 through the filter 5. The return liquid from the washing tub 3 is connected to the liquid storage tub 2 through the drain pipe 3b from the lower part of the washing tub 3. Between the discharge pipe 3b and the liquid storage tank 2, an aeration unit 10 is provided with a tip 12 of a pipe 12 from an ozone generator 20 separately installed in a trap 11 which is partially sunk in the liquid storage tank 2 and also serves as a dust remover. The ozone is introduced into the liquid and opened, and the ozone supplied from the ozone generator 20 is discharged into the liquid to be aerated. In addition,
The aeration unit 10 is preferably provided at a position apart from the position of the liquid suction pipe 4a of the liquid circulation pump 4 inserted in the liquid storage tank 2.

The liquid supply line 8 is a discharge port 4b of the liquid circulation pump 4.
Is branched into a plurality of filters 5 and 5, and the pipes from the outlets of these filters 5 and 5 are gathered and connected to the upper liquid supply port 3a of the washing tub 3 through the cooler 30. There is. As the cooler 30, for example, as shown in FIG. 2, a cooling water is sent from the outside of the cooling can 31 to a cooling water reservoir chamber 35 arranged in a cooling can 31 formed of a closed container and gently moved. In this way, the dry cleaning liquid is cooled by liquid-liquid heat exchange. In the figure, reference numeral 32 is a cooling water inlet, 33 is a cooling water outlet, and 34
Is a liquid inlet, 34 'is a liquid outlet, 37 is a cooler, 38 is a cooling water storage tank, 38a is a cooling water supply pipe, 38b is a cooling water return pipe, and 8a and 8b.
Is a check valve, and 9 is a thermometer.

The apparatus for purifying a dry cleaning liquid of the present invention thus constructed uses the same dry cleaning liquid as the conventional one, and a required amount of detergent and a softening agent are added to the dry cleaning liquid to wash the tub 3 for a predetermined time. Then, the washing operation is performed, and then the dry cleaning liquid is circulated by the liquid circulation pump 4 to perform the washing operation. During this cleaning operation, the aeration unit 10
If ozone is continuously supplied from the ozone generator 20 to the dry cleaning liquid which is constantly accumulated in the trap 11 and discharged sequentially, the ozone is discharged in the trap 11 and aeration is performed.

In the trap 11, the dry cleaning liquid by the aeration operation with ozone is combined with the detergent and the detergent liberated by the washing of the laundry in the washing tub 3 to become fine particles and float in the liquid. However, it is returned to the liquid storage tank 2 under the influence of active oxygen generated by the decomposition of ozone. After that, the fine particles are aggregated and settled and separated in the liquid storage tank 2, and become a liquid having a small amount of suspended fine dust particles, which is pumped up by the liquid circulation pump 4 and passed through the filter 5 to be a clear liquid and sent to the washing tank 3. Be done. When the liquid that has been subjected to the aeration operation by ozone in the aeration unit 10 is stored in the liquid storage tank 2 and sent out by the liquid circulation pump 4, it becomes a liquid in which the amount of suspended fine dirt particles is small. It is presumed that the action of active oxygen generated during the decomposition of ozone assists the agglomeration behavior of the fine dirt particles suspended in the dry cleaning liquid. Further, the return liquid is subjected to a sterilizing action by the action of active oxygen, so that the dry cleaning liquid repeatedly used is made clean and hygienic. In addition, from the ozone generator 20 to the aeration unit 10
The ozone supplied to is decomposed in the aeration unit 10 without being excessively supplied, and is treated without causing any trouble to the outside.

The liquid circulation pump 4 is subjected to the above-mentioned processing.
The dry cleaning liquid clarified by the filters 5 and 5 is cooled by cooling water while passing through the cooler 30, and is usually cooled to 15 to 20 ° C. and supplied to the washing tub 3. By this cooling operation, the temperature of the dry cleaning liquid is suppressed to the boiling point or lower, vaporization is prevented, and the cleaning effect can be enhanced.

In the apparatus for purifying the dry cleaning liquid of the present invention, in addition to the indirect cooling by the cooler 30 as described above, the liquid cleaning tank 2 as shown in FIG. 3 is used as the means for cooling the dry cleaning liquid. A cooling pipe 36 is disposed inside, and cooling water cooled by a known cooling device 41 disposed outside is supplied and circulated to the cooling pipe 36 to directly cool the dry cleaning liquid in the liquid storage tank 2. Such a method can also be adopted. In this case, if the cooling device 41 has a large capacity, the cooling rate can be freely controlled. The same parts as those in the above-described embodiment are designated by the same reference numerals. Reference numeral 8'in the figure is a liquid return conduit.

[0015]

As described above, according to the present invention, the dry cleaning liquid that is circulated can be purified without using a complicated mechanism, and at the same time, it can be repeatedly used after being sterilized and bleached by utilizing the characteristics of ozone. Nevertheless, it can be treated hygienically and can be used for a long time as an effective cleaning liquid. Therefore, it is possible to reduce the measures for the disposal of the used liquid, and the economic efficiency is improved.

[Brief description of drawings]

FIG. 1 is a flowchart showing an outline of a dry cleaning liquid purification apparatus of the present invention.

FIG. 2 is a sectional view showing an example of a liquid cooler.

FIG. 3 is a schematic diagram showing another example of the dry cleaning liquid purification apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing machine 2 Liquid storage tank 3 Washing tank 3a Upper liquid supply port of washing tank 3b Washing tank discharge pipe 4 Liquid circulation pump 4a Liquid suction pipe 5 Filter 8 Liquid supply pipe 10 Aeration part 11 Trap 12 Ozone pipe 20 Ozone Generator 30 Cooler 35 Cooling water reservoir 36 Cooling pipe 41 Cooling device

Claims (1)

[Claims] 1. An aeration unit is provided at an appropriate position between a discharge side of a washing tub and a liquid circulation pump in a circulation system of a dry cleaning liquid in a dry cleaning machine, and the ozone generator supplies the aeration unit. An apparatus for purifying a dry cleaning liquid, wherein the dry cleaning liquid is aerated by ozone, and a cooling means for the dry cleaning liquid is arranged between the liquid storage tank and the washing tub.