Pre

1. • Faculty of : engineering
• Department : Telecom
• Semester : six
• Course of : cantrol system
• Assignment : wash cloth
cantrol
• Lecture : Eng abdiaziiz
• Date : 13-04-2021
• Group names :
1. Jama Abdikhayr Farah
2. Mohamed abdi mohamed
3. Mohamed abdirahman
Mohamed
4. Mohamed Ahmed Katun

6. Clothes washing machines
If there's one household appliance most of us simply could not do
without, it's the clothes washer. If you've ever been without your
machine for a few days or weeks, you'll know just how hard it is to
wash clothes by hand. Although clothes washers look pretty
straightforward, they pull off a really clever trick: with the help
of detergents, they separate the dirt from your clothes and then
rinse it away.

7. The parts of a clothes washer
• The basic idea of a clothes washer is simple: it sloshes your
clothes about in soap suds for a while and then spins fast to
remove the water afterward. But there's a bit more to it than
that. Think of a clothes washer and you probably think of a big
drum that fills with water—but there are actually two drums, one
inside the other.

8. • The inner drum is the one you can see when you open the
door or the lid. In a front-loading clothes washer, common in
Europe, the drum faces forward. You push your clothes inside
the door from the front and the whole drum rotates about a
horizontal axis (like a car wheel). The drum has lots of small
holes to let water in and out and paddles around the edge to
slosh the clothes around
• The drum is mounted about a vertical axis but doesn't actually
move. Instead, there's a paddle in the middle of it called
an agitator that turns the clothes around in the water.
• There's a second, bigger drum outside the inner drum that you
cannot see. Its job is to hold the water while the inner drum (in a
front-loader) or the agitator (in a toploader) rotates. Unlike the
inner drum, the outer drum has to be completely water-tight—or
you'd have water all over the floor!

9. • The two drums are the most important parts of a clothes
washer, but there are lots of other interesting bits too. There's
a thermostat (thermometer mechanism) to test the temperature
of the incoming water and a heating element that warms it up to
the required temperature. There's also
an electrically operated pump that removes water from the drum
when the wash is over. There's a mechanical
or electronic control mechanism called a programmer, which
makes the various parts of the clothes washer go through a
series of steps to wash, rinse, and spin your clothes. There are
two pipes that let clean hot and cold water into the machine and
a third pipe that lets the dirty water out again. All these pipes
have valves on them (like little doors across them that open and
shut when necessary).

10. The washing machine program
• Photo: Controlling a washing machine: Top:
An old-style mechanical clothes washer
programmer. The dial on the left selects the
program. The dial on the right sets the wash
temperature (it's effectively a thermostat).
Bottom: A modern electronic programmer.
These dials are mounted on a computerized
programmer circuit. The countdown-display
tells you how long in hours and minutes it
will be before your washing is clean and
ready to take out (one hour and two minutes
in this case, for a 30°C wash with a very fast
1400rpm spin).

11. • Advantages:
• Easier to stack the dryer on
top of the washer
• Typically, gentler on clothes
• Uses less water
• Extracts more water from your
clothes, requiring less time
and energy in your dryer
• More Energy Efficient
• Less Noisy
• Best Washing Quality
•Disadvantages:
• Cost more
• More bending involved getting
wet clothes out after the cycle
is finished
• Door gasket mildew and
odors can be an issue
• More Expensive
• Long Cycle Time
• Limited Capacity