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FUZZY LOGIC WASHING MACHINES
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From the first washing tool, a broom
with four fingers at the bottom to
move the clothes around the bucket,
to the modern fully automated ones, washing
machines have come a long way.
Washing machines are gradually emerging
as an omnipresent dhobi in Indian
homes.
The market is flooded with many models,
each boasting of a large number of
features and specialties. So you are likely
to get confused as to which washing machine
to buy. A big disadvantage in shopping
for washing machines is that you
can’t try them out in showrooms. However,
you can still choose the right machine
for your needs if you’re able to understand
the specifications included in the
product brochure. Here we detail what you
need to take into account while selecting
a fuzzy logic washing machine.
The basics
Washing machines incorporate a tub with
heating element and something to rotate
or scrub the clothes in the drum. Once
the water and detergent are added, mechanical
action begin to soak and agitate
the clothes. Fuzzy logic electronics intelligently
improves the wash performance in
washing machines.
Washing machines are mainly of three
types, namely, semi-automatic, automatic,
and washer. In semi-automatic machines
the controls are not fully automatic and
By: R. Narayanan manual intervention is required. In fully
automatic machines, no manual intervention
is required during the washing process.
Washers are single-tub machines that
only wash. Since washers don’t have the
facility for drying the clothes, these cost
less than semi-automatic and fully automatic
washing machines.
For automatic machines, programs
have to be selected and set by the user
prior to the start of wash cycle. Sensors
sense the wash load and decide the program
ideal for washing the clothes, water
level, time required to wash, number of
rinses and spins, type of fabric, etc. Fuzzy
logic washing machines with special sensors
are the most easy to use.
Fuzzy logic. Fuzzy logic washing machines
are gaining popularity. These machines
offer the advantages of performance,
productivity, simplicity, productivity,
and less cost. Sensors continually
monitor varying conditions inside the machine
and accordingly adjust operations
for the best wash results. As there is no
standard for fuzzy logic, different machines
perform in different manners.
Typically, fuzzy logic controls
the washing process, water intake,
water temperature, wash time,
rinse performance, and spin speed.
This optimises the life span of the
washing machine. More sophisticated
machines weigh the load (so
you can’t overload the washing machine),
advise on the required
amount of detergent, assess cloth
material type and water hardness,
and check whether the detergent
is in powder or liquid form. Some
machines even learn from past experience,
memorising programs and
adjusting them to minimise running
costs.
The diagnostic fault-finding system
displays a fault code if any
problem arises. You can then convey
this code to the service centre,
thus ensuring that the repair technician
reaches with the right parts to fix
it without delay.
FUZZY LOGIC
WASHING MACHINES
The higher the spin speed, the dryer the clothes at the end of the washing cycle and hence the
shorter the drying time in the tumble dryer. Opt for a model that spins at more than 1000
revolutions per minute
Samsung SWF-P10
DECEMBER 2003 ELECTRONICS FOR YOU
CMYK
Machines with fuzzy logic microprocessors
can be updated as and when a
new technology or program comes up. Several
models of Internet-enabled washing
machines have been launched. When the
networked home becomes a reality, these
machines will allow downloading of new
programs and remote fault diagnosis over
the direct Internet connection.
Most fuzzy logic machines feature ‘onetouch
control.’ Equipped with energy saving
features, these consume less power
and are worth paying extra for if you wash
full loads more then three times a week.
Inbuilt sensors monitor the washing process
and make corrections to produce the
best washing results. In some machines a
tangle sensor senses whether the clothes
are tangled and takes corrective action by
adjusting the water current, so the clothes
don’t tangle further and are cleaned better.
High-end machines have a ‘suds free’
system including a pressure sensor to detect
extra suds in washing if you’ve used
a large amount of detergent. The washing
machine drains water together with the
detergent and then refills with minimum
water to restart. These machines cost more
than regular models. The foam suppression
feature detects whether too much
foam is present during wash and accordingly
it either reduces the agitation or adds
an extra rinse.
The fuzzy logic checks for the extent
of dirt and grease, the amount of
soap and water to add, direction
of spin, and so on. The
machine rebalances washing
load to ensure correct
spinning. Else, it reduces
spinning speed if an imbalance
is detected. Even distribution
of washing load reduces
spinning noise.
Neuro fuzzy logic incorporates
optical sensors to sense the
dirt in water and a fabric sensor to
detect the type of fabric and accordingly
adjust wash cycle.
Capacity
Consider your family size and the average
number of clothes you wash daily. For a
family of three, a capacity of 4 kg suffices.
A 6kg capacity is okay for a family
of five to six members. A higher-capacity
machine offers the convenience of washing
more clothes at one go but consumes
more power.
Choice of size also depends on the
area of the place where you intend to place
your washing machine. Smaller-capacity
machines wash fewer clothes, but these
can easily fit in a limited space. Take the
installation space measurements to the
showroom before buying to crosscheck
with the machine size.
Standalone or washer-dryer?
Although washer-dryer machines don’t operate
with the efficiency of standalone
washing machines, they offer enormous
space saving. However, you have to drain
all the soap water before drying. Also, you
can’t wash and dry at the same time and
the drying performance is inferior to that
of standalone machines. But then, washerdryers
cost less and allow you to wash
and dry your clothes without having to
reset the machine.