SU1730288A1 - Linen washing method - Google Patents

Abstract

SUMMARY OF THE INVENTION: In the washing tub of the machine with a load of, for example, 1.5-3 kg of dry laundry, with built-in acoustic radiators in an amount of 2-4 pieces, the detergent solution is poured and the preliminary and main washings are carried out for 5-7 minutes. The pump pumps the washing solution through the radiators. At the jet exit from the hydroacoustic radiator, oscillations with a frequency of 1-3 kHz occur in the washing tub, and the oscillation intensity is 0.1-0.5 W / cm by volume of the washing tub. After washing, several rinses are performed in hot and cold water. Hydroacoustic emitters operate during the entire cycle in a pulsed mode with a pulse frequency of 1-2 Hz

Description

The invention tends to the washing area of laundry in a household washing machine, as well as under the conditions of industrial laundries.

There is a known method of washing laundry in washing solution using ultrasound, including preliminary and main washing, rinsing in hot and cold water when exposed to ultrasound with a frequency of 18-60 kHz continuously throughout the cycle.

The disadvantages of the prototype include significant loss of strength of the fabric due to the continuous effect of ultrasound, the unevenness of washing certain areas of the linen due to the short wavelength of ultrasonic vibrations, the high cost of ultrasonic energy and its adverse effect on the human body.

The aim of the invention is to reduce the loss of strength and increase the efficiency of washing the linen.

The proposed method of washing the laundry in a household washing machine is carried out as follows: in the washing machine tank with a load, for example, 1.5-3 kg of dry laundry, with built-in acoustic radiators in an amount of 2-4 pieces, pour detergent solution and carry out a preliminary ( within 1.5-2 minutes) and the main (within 4-5 minutes) wash. In this case, the pump pumps washing solution through the emitters. At the jet exit from the hydroacoustic radiator, oscillations with a frequency of 1–3 kHz occur in the washing tub, while the oscillation intensity is 0.1-0.5 W / cm by volume of the washing tub. After washing, the first rinsing is done at 40-45 ° C: the next rinse is at a temperature

-h with about

hO

oe with

20 ± 5 ° С. Hydroacoustic emitters operate during the entire cycle in a pulsed mode with a pulse frequency of 1-2 Hz.

As the results of the analysis show, the best effect (reduction of loss of strength and increase in the efficiency of the washed ™ bel) is observed at an oscillation intensity of 0.1–0.5 W / cm2, a frequency of acoustic oscillations (fundamental harmonics) of 1-3 kHz and a pulse frequency, equal to 1-2 Hz.

When the intensity of the oscillation decreases below 0.1 W / cm2, the oscillation of the main harmonic and the alternating pressure decreases, resulting in pulsating bubbles reducing their oscillatory velocity, thereby reducing the effect of washing the laundry. Increase in vibration intensity more

L

0.5 W / cm leads to the activation of pulsating bubbles and the appearance of a jetting field of the cavitation field, as a result of which the micro-impact effect of the pulsating and cavitation bubbles increases, which leads to an increase in the loss of strength and washable underwear.

A decrease in the oscillation frequency (main harmonic) below 1 kHz leads to vibration due to the fact that the half-wave length is much larger than the size of the tank diameter where the washing process takes place, moreover, a sharp decrease in the number of pulsating bubbles leads to a decrease in the efficiency of washing the laundry. An increase in the oscillation frequency of more than 3 kHz leads to a loss of strength of the whiteness due to an increase in cavitation, as well as an increase in fluid pressure at the inlet of the hydroacoustic radiator, which leads, on the one hand, to an increase in pump power, and on the other, to strong foam formation, which also negatively affects on the effectiveness of washing belle.

Regarding the issue of frequency (pulse feed), it should be noted that

when the pulse frequency decreases below 1.0 Hz, the character of washing the laundry acquires an almost continuous mode of exposure to acoustic oscillations. This fact does not allow to increase the efficiency of washing the laundry because the equilibrium mode does not have time to be restored. With an increase in the pulse frequency of more than 2 Hz, the washing process becomes ineffective due to a decrease in the washing time in a jet-pulsating field.

Claims (1)

The invention The method of washing linen, including preliminary and main washing of the linen in the washing solution during heating and rinsing in warm and cold water under the influence of hydroacoustic oscillations during the whole cycle, characterized in that In order to reduce the loss of strength and increase the effectiveness of the laundry, the washing and rinsing processes are performed at a frequency of 1-3 kHz with an intensity of 0.1-0.5 W / cm2, wherein the washing and rinsing of the laundry is carried out in a pulsed mode with a pulse frequency of 1-2 Hz.