DD287289A5 - SOFT RINSE PROCESSING IN A WASHING MACHINE WITH A WATERPROOF DRUM - Google Patents

Abstract

The invention relates to a Weichspuelverfahren to achieve very good Weichspueleffekte with minimal use of softeners in household washing machines with a waterproof running drum. The technical problem to provide a method which allows homogenization of the Weichspülflotte outside of the waterproof drum with the least number of additional modules and which allows by appropriate Flottenverhaeltnisse despite reducing the amount of Weichspuelmittel optimal Weichspueleffekt is solved, dasz in a Mesz- and Recycling container a concentrated Weichspülmittelflotte with Saeuretraeger in Flottenverhaeltnis from 1: 2 to 1: 2.5 is recognized and thereby the pumping process from the Mesz- and recycling container in the rotating drum with washing speed, the Weichspülmittelflotte is converted with the fresh water to a homogenized liquor. The drum rotates at a washing speed for a predetermined time and is then placed in spinning speed without dasz while the homogenized liquor is discharged. After the spinning process, the liquor ratio is increased to 1: 5 to 1: 6 with continuous drum run. Fig. 1 {drum washing machine; Weichspuelverfahren; Measuring and recycling containers; Homogenize; Weichspuelmittelflotte; Flottenverhaeltnis; Spin speed; Wash speed; low amount of softener agent; optimal softening effect}

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to a fabric softening process to achieve very good Weichspüleffekte with minimal use of fabric softeners in Haushaltswaschmaschinan with a waterproof executed Trommol

Characteristic of the known state of the art

Fabric softeners serve as aftertreatment agent in the rinsing process. They give the laundry a soft feel and equip the fibers with anti-static.

The dosage of the fabric softener and the technology for applying the fabric softener to the fiber is a particular problem, since with little fabric softener good properties of the laundry in terms of grip, electrostatic charging and ironability to be achieved.

The economical use of fabric softener is increasingly, also for ecological reasons, in the center of the development work, since larger quantities of fabric softeners, which damage the sewage slange.i, the biological sewage treatment plants and the plant and animal world in the water.

There are still too large amounts of fabric softener used because there are no optimal process techniques that make it possible, even with small amounts of added fabric softener good Weichspüleffekte: u achieve. In known solutions, the Woichspülmittel is added to the dispenser of the washing machine and out of control with the inflowing rinse water in the wash tub.

The fabric softener is distributed unevenly in the rinse. With the Trommelbowegung the fabric softener comes into contact with the fibers of the laundry and pulls depending on the distribution in the rinse on the fiber irregularly. The fabric softener is also high because it works with a high liquor ratio. In another known solution, the water is first fed to the tub without detergent and then the fabric softener is added to the rinsing bath during drum movement.

With this solution even better effects orziolt. However, it does not yet represent an optimum with regard to dishwashing detergent and softening effect.

From the literature, a possibility is known in which a homogeneous fabric softener solution is prepared and then fed to the tub.

For this theoretical possibility, however, there is no practical implementation, since in addition to the Waschiaugonbehälter another necessary container would be too expensive.

An essential prerequisite for a good fabric softening effect is the even distribution of the fabric softener on the fiber.

However, this requires that the fabric softening agent, when in contact with the fiber, already be homogeneously distributed in the liquor. The requirement is, as already mentioned above, not to realize economically with the known devices and methods.

Furthermore, it should be noted that increases with increasing the concentration of the fabric softener in the rinse the Weichspüleffekt.

This means that with a very short liquor while reducing the amount of fabric softener still the concentration per liter 'wash liquor can be increased. ,

In this case, an optimum is to be maintained, since in turn leads to an excessive fabric softening agent on the fiber to increasing water repellency and to an unpleasant stickiness of the laundry.

All known methods and devices have the disadvantage that the obengenar ned demands to ensure optimal Weichspüleffektes with minimal use of fabric softening so are not or only with high technical and economic effort feasible.

Object of the invention

The object of the invention is a fabric softening process for household washing machines with a water-resistant drum, which allows an optimal Weichspüleffekt with minimal use of fabric softeners with low technical and economic effort.

Explanation of the essence of the invention The technical problem to be solved by the invention is to provide a fabric softening process which

outside the watertight drum with the least number of additional assemblies homogenizing the

Softening liquor allows and which by appropriate liquor ratios despite reducing the Amount of fabric softener allows optimal Weichspüleffekt. According to the invention the object is achieved in that in a measuring and recycling container a concentrated Fabric softener liquor with acid carrier in the liquor ratio of 1: 2 to 1: 2.5 is applied and by the pumping of

the measuring and recycling container in the circulating with washing speed drum, the fabric softener with the

Fresh water is converted to a homogenized liquor. The drum runs in washing speed for a predetermined time and is then placed in spin speed, without causing it

the homogenised liquor is discharged.

After the spinning process, the liquor ratio is increased to 1: 5 to 1: 6 with continuous drum running. After the final spin, the free liquor is stored in the measuring and recycling container for the following wash batch. embodiment The inventive method will be explained in more detail below with reference to the schematic diagrams 1 to 5. In Figures 1 to 6 are simplified, the basic structure of the system for the realization of the fabric softening process and

individual modules shown to different process steps.

Fig. 1 shows the assemblies that are necessary to explain the fabric softening process. A watertight running drum 1 is cantilevered. The loading and unloading of the laundry takes place via the filling opening 2

on the drum front side 3. In a conventional manner, the drum 1 with a measuring and recycling container 4 via a

Hose line 5 connected. This measuring and recycling container 4 is used for dosing the washing and rinsing liquor and for storing the free liquor

the last rinse bath for reuse for a subsequent wash batch.

In the hose D is a pump 6 interposed. The fabric softener is on the Welchspülmittelbehälter. 7

flushed.

The fresh water used 8 corresponds to a liquor ratio of 1: 2 to 1: 2.5. Softener container 7 and measuring and recycling container 4 are connected by a hose line 9. The Fresh water supply is shut off by a solenoid valve 10. The located in the measuring and recycling container 4 Fabric softener liquor 11 is not yet homogeneously distributed in the fresh water 8. The unevenly distributed with fresh water 8 Flushing agent liquor 11 is from the measuring and recycling container 4 by means of pump β in the rotating at washing speed Drum 1 promoted. By the pumping process, the fabric softener 11 is homogenized. Fig. 2 shows the homogenizing of the measuring and recycling container 4 with fresh water 8 unevenly distributed Fabric softener liquor 11 in the pump 6. By homogenizing in the pump 8 and by the rotation of the drum 1 during the Einspülvorganges hardly occur Concentration differences on the fiber surface. As a result, without a high liquor level, a uniform distribution of the fabric softener liquor 11 on the fiber surface

be achieved. Due to the low duty cycle ratio of 1: 2 to 1: 2.6 during the fabric softening process in the drum 1, 30% to 50% less fabric softener can be used than in conventional processes.

FIG. 3 shows the uniform distribution of the fabric softener liquor 11 in the drum 1 filled with laundry 12. The softener liquor 11 was pumped into the drum 1 as a homogenized liquor 13. The laundry 12 is well penetrated with the homogenized liquor 13 with rotating drum 1. In this case, the homogenized liquor 13 and thus the fabric softener uniformly applied to the fiber surface.

FIG. 1 shows the drum 1 in the spinning process during the rinsing process. After the homogenized liquor 13 is uniformly drawn onto the fiber surface, a short spin cycle occurs

moderate speed and then a laundry loosening in the wash cycle.

During the spinning process, no homogenized liquor 13 is pumped out into the drain. The whole homogenized Fleet 13 remains in the drum 1. During the moderate spin process, d ^! 9 homogenized liquor 13 in the fiber structure and the finishing effect

continues to increase despite the small amount of homogenized liquor 13.

The spin cycle takes place in the intervals spin cycle - washing process - spin cycle - wash cycle. FIG. 5 shows the method step following the spinning process. The free liquor 14 present in the drum 1 after the spin cycle is carried out at a liquor ratio of 1: 5 to 1: 6 Fresh water 8 filled. The drum 1 is then placed in washing speed. The entire process is effectively only possible hei waterproof drum 1 executed. When double drum principle is due to the existing free fleet between the drum and container such a Procedure not economical.

Claims (1)

Fabric softening process in a washing machine with a watertight drum, a measuring and recycling tank and intermediate pump, characterized in that a) by the measuring and recycling container (4) a concentrated fabric softener (11) with acid carrier in the liquor ratio of 1: 2 to 1: 2.5 is recognized and by the pumping process from the measuring and recycling container (4) in the circulating at washing speed drum (1) the fabric softener liquor (11) is converted with the fresh water (8) into a homogenized liquor (13), b) the drum (1) circulates at a washing speed for a predetermined time and is subsequently put into spinning speed, without the homogenized liquor (13) being discharged, c) after the spinning process the liquor ratio is increased to 1: 5 to 1: 6 with constant drum running at washing speed, d) after the final spin the free liquor (14) is stored in the measuring and recycling container (4) for the following wash batch.