SU1694744A1 - Method of washing textiles in drum-type washing machines - Google Patents

Abstract

The invention relates to washing and allows improving the quality of the treatment. The method consists in placing the products in a drum filled with a treatment solution, followed by mechanical action on the products. The latter is carried out by rotating the drum, which presses the products against the drum shell and forcibly separates the products from the drum shell in its upper half. When mechanically acting on the products, the rotation of the drum is carried out by its inclusion in separate pulses. At each pulse, the drum is rotated through an angle of 70-130 °. 1 il.

Description

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The invention relates to washing, in particular to washing laundry in drum washing machines, and can be used in everyday life.

The purpose of the invention is to improve the quality of processing.

The goal is achieved by placing the product in a horizontal drum filled with the treatment solution, followed by mechanical action by rotating the drum at a speed that provides a separation factor greater than 0.8. When the drum rotates, the products are forcibly separated from the drum shell in its upper half by turning on the drum with separate pulses.

The duration of each switch-on for different drive designs is determined from the following relationship

where m € 0,1;

(Op is the angular velocity of rotation of the drum during the period of steady motion,

ftfc is the angular velocity of rotation of the drum, at which the value of the separation factor Φ 0.8 is provided, s 1.

At each pulse, the drum is rotated at an angle of 70 - 130 °.

The proposed method is illustrated by the following examples of its implementation.

PRI me R 1. The duration of individual actuator actuations is controlled by a pulsator. Adjust the pulsator for the duration of inclusion, providing the angle of rotation of the drum 70 °.

Textile products are loaded into the drum (kg), detergent (75 g) is introduced, after which the drum is closed. Company

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pour a regulated amount of water (17 dm3).

The concentration of the detergent, the temperature (45 ° C in the prewash and 85 ° C in the main wash) and the amount of water poured in, as well as the duration and sequence of individual operations are regulated.

Turn on the washing machine. At the same time, the drum with textiles in it rotates at a speed that provides separation factor 1, the horizontal loading section becomes oblique, some textiles lower (fall) the other part, lift, acquire acceleration.

When the angle of rotation of the drum is 70 °, the motor is turned off. At the same time, a part of textiles raised to the maximum height separates from the total mass of products and, falling along a parabolic trajectory, collides with the shell and textile products in the lower part of the drum, which are fixed at this moment. The immobility of the drum and textiles at the moment of impact is due to the fact that the bulk of the products creates a large moment of resistance to the movement of the drum and quickly slows it down.

During the collision, deformation of the fabric of the articles occurs, accompanied by intensive movement of the washing solution through the fabric. This ensures more efficient removal of contaminants.

During subsequent short-term switching on, a new batch of products rises to the maximum height, which, after turning off the rotation of the drum, come off and, pad, collide with the shell and partially with textile products at the bottom of the drum.

By reducing the drive-on time, providing a drum turning angle of less than 70 °, textiles rise to a lower height and, falling or partially rolling down, impact only the textiles in the bottom of the drum. When this occurs, there is a decrease in the intensity of deformation of the fabric of products and, as a consequence, a significant decrease in the quality index of washing, than with a drum angle of more than 70 °.

PRI mme R 2. Adjust the pulsator for the duration of the inclusion, providing a drum angle of 130 °.

Textile products are loaded into the drum, detergent is injected, after which

the drum is closed. Fill the regulated amount of water.

The concentration of the detergent, the temperature and amount of water poured, as well as the duration and sequence of individual operations are regulated,

The mass of processed textiles, the amount of water to be drunk, the number of CMC and other technological conditions are similar to the first example.

Turn on the washing machine. At the same time, the drum with textile products in it rotates at a speed that provides separation factor 1, the horizontal loading section becomes oblique, some textile products fall, the other part, lifting, acquires acceleration.

Upon reaching a drum angle of 130 °, the motor is turned off.

At the same time, a part of textiles lifted to the maximum height is detached from the total mass of the items and, falling along a parabolic trajectory, strikes the drum shell in its lower part, free from textiles. At the moment of impact the drum is motionless. The immobility of the drum at the moment of impact is ensured by a sufficient in this case the value of the moment of resistance created by the main mass of textiles.

During the collision, deformation of the fabric of the articles occurs, accompanied by intensive movement of the washing solution through the fabric. At the same time, more effective removal of contaminants is provided than with the traditional method.

With an increase in the drive-on time, providing a drum rotation angle of more than 130 °, textiles falling from the maximum height collide with the shell, which is still moving by inertia. The inertia of the drum continues, since at this moment the load and the drive have a large moment of inertia prevailing over the moment of resistance. This reduces the impact energy of the product against the shell and, as a result, the quality index of washing is reduced compared to the angle of rotation of the drum, equal to 130 °,

PRI me R 3. We adjust the pulsator for the duration of switching on, providing a drum rotation angle of 100 °.

Textile products are loaded into the drum, detergent is injected, after which the drum is closed. Fill the regulated amount of water.

The concentration of the detergent, the temperature and amount of water poured, as well as the duration and sequence of the individual operations are regulated. The mass of processed textiles, the amount of water, the number of CMC and other technological conditions are similar to the first example.

Turn on the washing machine. At the same time, the drum with the textile products located in it rotates at a speed that provides separation factor 1. The horizontal loading section becomes oblique, a part of the textile products is lowered (falls), another part, lifting, acquires acceleration.

When the angle of rotation of the drum reaches 100 °, the motor is turned off.

At the same time, a part of textiles raised to the maximum height is detached from the total mass of the items and, along a parabolic trajectory, collides with the drum shell in its lower part, free from textiles. During the collision, deformation of the fabric of the articles occurs, accompanied by intensive movement of the washing solution through the fabric.

This achieves the maximum effect of removing contaminants, which is possible with a drum-type washing method, as textiles fall from the maximum height into the lowest part of the drum and hit the side of the drum.

In these examples, the values of the quality index of the sweepability are 10% higher than in the known methods.

Thus, the limits of the angle of rotation of the drum (70 - 130 °) during the washing process ensure the maximum effect of washing the processed textiles. At angles of rotation of the drum

less than 70s and more than 130 °, the effect of washability is reduced.

The drawing shows a graph of the dependence of sweepability (O) on the angle of rotation of the drum during the time of switching on the electric motor at each pulse (p). The interval of angles of 70–130 ° corresponds to the region of maximum of the indicated curve.

The proposed method, through the use of a two-speed electric drive and the use of a pulser, provides three different movements of products in the drum, namely:

impulse wash - ensured by the operation of the pulsator;

automatic layout and intermediate spin - provided with the pulser off and the speed of steady rotation turned off; the final spin is provided by switching on the second rotation speed of the drive.

This invention increases the uniformity of the cleaning of processed products.

Claims (1)

Invention Formula The method of washing textiles in drum-type washing machines is by placing the products in a horizontal drum filled with a treatment solution, followed by a mechanical impact on the products by rotating the drum, ensuring that the products are pressed against the drum shell and forcibly separating the products from the drum shell in its upper half, characterized by that, in order to improve the quality of processing, when mechanically acting on products, the rotation of the drum is carried out by its inclusion pulses, with each pulse turning the drum at an angle of 70-130 °. "five 60 70 SO 90 - / 00 MO # 0 I # 0 y