This document contains information about an electrical appliances course taught by Zahir Uddin Ahmed. The course covers the construction and operation of appliances that use heating principles like electric irons as well as appliances powered by electric motors. The course aims to help students understand how these appliances work and develop skills in diagnosing faults, repairing, and servicing them. Specific topics that will be covered include the working principles, types, parts and specifications of an electric iron. Diagrams and details are provided about the sole plate, pressure plate, heating element, thermostat and other parts of an electric iron.

1. Zahir Uddin Ahmed
Instructor, Electrical Technology
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2.  Greetings
 Move around the room so students have to pay attention more
readily
 Moral Story
 Prepare Mindset.
 Education Aid Proper Setup.

3.  SUBJECT: ELECTRICAL APPLIANCES
 SUB CODE: 6741
 CREDIT: 4
 SEMESTER:4TH
 TECHNOLOGY: ELECTRICAL

4.  To develop understanding and skill on the construction and
operation of electrical appliances based on heating principle.
 To develop understanding and skill on the construction and
operation of appliances operated by electric motor.
 To enable to acquire skill/competence in diagnosing/localizing
faults and repairing & servicing of electrical appliances.

5.  Electric iron; Electric heater; Microwave oven; Rice
cooker; Toaster, Hair drier, electric shaving machine,
Kettle. Electric fan; Rechargeable lamp; Vacuum
Cleaner; Blower; Blender; Washing machine; Water
pump; Refrigerator; Air conditioner; Lift and escalator.

6.  Working principle of electric iron.
 Different types of electric irons.
 Different parts of an electric iron.
 Diagram of an electric iron.
 Specification Data of electric iron.

7.  An electric Iron is a combination of heat and pressure
removes wrinkles. The principle of the electric iron is
that when current is passed through a coil, the coil gets
red hot and transfers the heat to the base plate of the
electric iron through conduction.

8. There are basically two types of electric irons:
1) Automatic
2) Non-Automatic

9.  Sole Plate
 Pressure Plate
 The Heating Element
 Thermostat
 The Cover Plate
 Handle
 Pilot Lamp

10.  The sole plate is the thick, triangular-shaped slab of
iron that forms the base over which the electric iron is
built up. The bottom surface and edges are heavily
chromium plated, to prevent it from rusting.

11. This plate is generally
called the top plate as it
follows the shape of sole
plate. The pressure plate has
some holes through which
the studs form the base
plate passes through.

12.  The heating element is present between the sole plate
and pressure plate. It is pressed hard between the two
plates. The heating element consists of nichrome wire
wound around a sheet of mica.

13.  The bimetallic strip is a simple element which converts
a temperature change into mechanical
displacement.The two metals should have a different
coefficient of expansion.

14.  The Cover Plate
The cover plate is made of thin sheet of iron. It is placed on top
of the base plate and it covers all the internal parts of the iron.
 Handle
The handle can be made either with wood or with plastic. The
handle is attached to the cover plate with the aid of screws.
 Pilot Lamp
The pilot lamp is housed in the cover plate of the electric iron.
One end of the pilot lamp is connected to supply, while the other
end is connected to the heating element.

16. GENERAL
Brand- Sinny Gold
Model-Electric Iron-MW
Type-Dry, Stream
Color-White
Soleplate type-AL Alloy
Temperature Control- Yes
Cordless- Yes
Dimensions-H-140 mm, W-110
mm,
Depth-260mm
TECHNICAL
Power: 750 W
Voltage: 220-240 V
Current: 3 A
Frequency: 50 HZ
Fuse: miniature time-delay
Phase: Single

17. 1) Definition
2) Working
3) Parts
4) Specification
5) Uses

18.  I like to clarify All the Discussed Topics If Have Some
Confuse/Problems....

19. Reading
Writing
Oral

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