Page 272 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

iii Fully automatic type

In this type, the micro processor enables to programme the wash cycle. There will be only one tub. The machine
could be programmed for wash cycle, detergent intake and water input. The machine does washing, rinsing and
also dry the cloth and stops.
Further to the above types the washing machine could be further divided by the type of loading i.e. top loading
and front loading. In some machines the water used for washing could be preheated with the help of an electric
heater.
Types of wash techniques
In addition to the above classification, the washing machine could be catagorised according to the wash technique
used as explained below.
The pulsator wash technique ( Fig 1): This is the most common type pulsator wash technique, it has disc in
concave shape used to rotate the clothes in water. Dirt is removed from the cloth by rubbing against tub wall
surfaces and the disc. (Fig 1 & 2)

Fig 1

Fig 2

Tumbler type (Fig 3 a): In the tumbler type the washing is carried out by tumbling the cloths with the help of a
simple drum. Here the construction is simple and cloths are tumbled around the drum by virtue of the drum itself
being rotated by means of a pulley at the rear or the friction drive of the idlers.
The agitator wash technique (Fig 3b): An agitator which is long and cylindrical is installed at the centre of
the washing tub. The water and cloths circulate around the agitator, thereby under going a thorough cleaning
process. Not suitable for delicate fabric.
The air power wash technique: This machine uses air bubble technique to wash delicate fabrics smoothly.
The chaos punch wash technique: A multifaceted method of washing, where in water is propelled upwards in
the machine to prevent entanglement of garments punching, is done on clothes by forced water.
The water fall technique: This is more or less similar to chaos punch technique. This machine use jets of water
which are pumped from below the pulsator in to the tub. The velocity and force of water removes the dirt. Most of
the washing machines could be repaired by the electrician but micro processor controlled washing machine repair
needs some more training and experience.

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CITS : Power - Electrician & Wireman - Lesson 101-103