The introduction of advanced energy-saving technologies brought to the forefront of progress new device domestic purposes - ultrasonic washing device. Ultrasonically washing is due to the periodic formation in liquid waves of compression-rarefaction that occurs in virtually incompressible medium is water. Linen, placed in a liquid, subjected to intensive hydroacoustic effect. Hydroacoustic waves initiate the appearance of microscopic gas bubbles that contribute to the separation of micro-particles of dirt from the volume wash linen. In the formation and subsequent collapse (destruction) of gas bubbles formed ozone sterilizing underwear. In some cases, at high energy ultrasonic vibrations, can be observed sonoluminescence - the glow of fluids, especially noticeable in a darkened room.
The advantage of washing with the use of ultrasonic vibrations is that linen is not deformed, not abraded and broken. Washable wool even and fine linen. In addition to the washing and disinfection of linen, it is possible to process vegetables and fruits, intended for conservation, to disinfect water.
Appeared on the market of ultrasonic washing device (ultrasonic washer) type "Bionics" [1] are a compact electric device weighing 200 g Bionics consists of a network adaptor - power and CCS. The device itself in order to preserve the "know-how" potted, and the description of its concept and important for reproduction characteristics will be omitted. However, having obtained by measuring and analyzing the modes of the secondary device characteristics, it is possible to present one of the possible schemes for the PSM as follows (Fig. 1).
The CCS consists of a power source (DA1 chip), two interconnected generators operating at frequencies of 10 kHz and 1 MHz (DD1 chip), the output stage transistor VT1 and activator emitter connected to the points C and D devices. The power source in the prototype is made nonadjustable, designed for maximum power consumption - 3 watts, which is enough for washing clothes in the bulk liquid 10...25 liters. Seems more appropriate to provide ultrasonic washer continuously adjustable output power. In Fig. 1 in the gap between points A and b included a regulated stabilized DC source (25...1000 mA). In Fig. 2 shows a diagram of the regulated power supply (5...13). The envelope generator of pulses is made in the traditional on-a-chip DD1 and has no peculiar features. The values of RC-elements of the high-frequency generator can be adjusted when the frequency is in resonance with the frequency of the ultrasonic transducer of activator. DA1 chip and the transistor VT1 must be installed on the cooling plate.
The most problematic in the practical implementation of the CCS is the choice of the ultrasonic transducer activator and ensure its waterproofing while achieving maximum impact energy of ultrasonic vibrations in the environment (liquid). Typically, the ultrasonic transducer uses the piezoelectric ceramics of the barium titanate, strontium, emitters on a ferrite or permalloy cores of quartz crystal plates (Fig. 3) [2-4], which opens a wide field for experiment. One of the interesting options for receiving ultrasonic vibrations is just a passing pulses of electric current through the water using a system of closely spaced electrodes connected to points A and b devices. Periodic passage of current pulses between the electrodes will cause acoustic elektrostimulirovannuyu modulation solution. The electrodes can be recommended aluminum or graphite. When washing must be reliably isolated from the mains. Washing tank (bucket, basin) should be removed from the grounded object and mounted on a dry floor. Acoustic oscillations in the Erasure solution can be excited in the range of sound frequencies. The experiments showed that washing takes place under such conditions with acceptable compared with the prototype result.
Features of washing with the use of ultrasonic washer in washing solution is poured the same amount of washing powder, as with the hand washing, the water temperature should be about 65°C. Linen should float freely in solution, occasionally it should be stirred with wooden tongs. Heavily soiled areas of Laundry soap is recommended further. The washing process lasts 30 to 40 minutes or more (depending on the efficiency of the ultrasonic activator). Rinsing linen can also use ultrasonic washer. It should be noted that the experience of optimal use of CCS appears after several washings.
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