Working of Electric Iron Box Explained | PhaseNeutral
Summary
TLDRThis video explains the complete working of an electric iron, detailing its internal parts such as the heating element, thermostat, thermal fuse, and neon bulb. The heating element, made of nichrome, generates heat when connected to an AC supply. The thermostat regulates temperature using a bi-metallic strip to prevent overheating. A thermal fuse provides additional safety by cutting power if the thermostat fails. The video offers an insightful breakdown of how these components work together to control the iron's temperature effectively. Viewers are encouraged to subscribe for more technical content.
Takeaways
- 🔌 An electric iron is a vital tool in daily life for smoothing clothes.
- 📹 The video explains the entire working mechanism of an electric iron.
- 🧰 Key parts of an electric iron include the heating element, thermostat, thermal fuse, and neon bulb.
- 💡 The heating element, typically made of a high-resistance material like nichrome, generates heat when AC current flows through it.
- 🌡️ Magnesium oxide powder insulates the heating element coil from the iron's metal case.
- 🕹️ The thermostat regulates temperature by switching off the current flow when the iron reaches a preset temperature.
- 🔄 The bi-metallic strip in the thermostat bends based on temperature changes, helping manage heat by altering contact with the heating element.
- ⚙️ A thermal fuse acts as a safety feature, cutting off power if the thermostat fails and overheating occurs.
- 🧲 The electric iron’s neon bulb indicates when the device is on and connected to power.
- 🔧 The control knob on the iron adjusts the spring tension, modifying temperature levels for specific heat requirements.
Q & A
What is the main function of the heating element in an electric iron?
-The heating element is the heart of the electric iron, responsible for generating heat. It is made of a material called nichrome, which has high resistance and can sustain high temperatures.
Why is magnesium oxide powder used in an electric iron?
-Magnesium oxide powder is used to insulate the heating element coil from the metal case, preventing short circuits and maintaining safety during operation.
What is the purpose of the thermostat in an electric iron?
-The thermostat is used to sense the base plate's temperature and control the flow of current to the heating element, ensuring that the temperature does not exceed a certain level.
How does a bimetallic strip function in the thermostat of an electric iron?
-A bimetallic strip is made of two different metals that expand at different rates when heated. As the base plate's temperature rises, the strip bends, pushing a spring and disconnecting the electrical contacts, thus stopping the flow of current.
What happens when the base plate temperature decreases in an electric iron?
-When the base plate temperature decreases, the bimetallic strip returns to its normal position, reconnecting the contact points, allowing the current to flow again to the heating element.
How does the control knob of an electric iron regulate temperature?
-The control knob adjusts the spring tension in the thermostat. When set to a lower temperature, it causes the contact points to disconnect earlier, preventing the iron from heating beyond that set temperature.
What is the role of the thermal fuse in an electric iron?
-The thermal fuse is a safety device that protects the heating element by stopping the flow of current in case the thermostat fails and the iron overheats.
How does the neon bulb in an electric iron function?
-The neon bulb is connected to both ends of the heating element. It lights up when current is flowing through the element, indicating that the iron is in operation.
What materials are typically used for the heating element coil in an electric iron, and why?
-Nichrome is commonly used for the heating element coil because of its high resistance and ability to withstand high temperatures.
What would happen if the thermostat in an electric iron malfunctions?
-If the thermostat malfunctions and fails to regulate the temperature, the thermal fuse would blow to stop the current flow, preventing the iron from overheating and potentially causing a fire.
Outlines
🔥 Understanding the Electric Iron
The paragraph introduces the electric iron as an essential household item and outlines its internal components: the heating element, thermostat, thermal fuse, and neon bulb. The heating element, made of Nichrome, is the core component that generates heat when an AC supply is connected. The magnesium oxide powder insulates the coil from the metal case. The thermostat plays a crucial role in regulating the temperature of the iron's base plate by switching off the current when the temperature is too high. It consists of a bi-metallic strip that bends in response to temperature changes, controlling the flow of electricity. The video script explains the thermostat's function with a comparison between the expansion rates of steel and copper when heated. The thermal fuse is a safety feature that cuts off power to the heating element if the thermostat fails, preventing the iron from overheating and potentially causing a fire. The neon bulb is connected to the heating element and serves as an indicator light. The script also describes the connection of the phase, neutral, and earth wires to the iron's components and how adjusting the control knob affects the temperature of the iron.
Mindmap
Keywords
💡Electric Iron
💡Heating Element
💡Thermostat
💡Bi-metallic Strip
💡Thermal Fuse
💡Neon Bulb
💡Magnesium Oxide Powder
💡Contact Points
💡Base Plate
💡Control Knob
Highlights
An electric iron is an inevitable item in daily life, and this video explains its complete working.
Key internal parts of an electric iron include the heating element, thermostat, thermal fuse, and neon bulb.
The heating element is the heart of an electric iron, responsible for generating heat.
Heating element coils are typically made of nichrome material, known for its high resistance and heat tolerance.
Magnesium oxide powder insulates the heating element coil from the metal case, preventing electrical contact.
A thermostat is essential to control the temperature and prevent overheating by regulating the current to the heating element.
The bi-metallic strip in the thermostat bends when heated, which disconnects the contact points to stop the current flow.
The bi-metallic strip consists of two metals that expand at different rates, causing the bending effect used to regulate temperature.
When the temperature decreases, the bi-metallic strip returns to its original position, reconnecting the contact points to resume current flow.
The thermal fuse protects the iron from overheating by cutting off the current if the thermostat fails.
The neon bulb indicates the electric iron's operational status by being connected to the heating element.
When the thermostat senses the temperature exceeding 200°C, it disconnects the current to prevent further heating.
At temperatures below 150°C, the thermostat reconnects the current, allowing the heating element to warm up again.
Rotating the control knob to a lower setting reduces the tension in the spring, causing the thermostat to disconnect the current earlier.
The thermal fuse acts as a backup safety measure, stopping the current flow if the temperature becomes dangerously high.
Transcripts
an electric iron is an inevitable item
in our daily life
in this video we are explaining the
complete working of an electric iron
if you are first time in this channel
please subscribe our channel for more
videos about technical doubts
inside parts of electric iron are
heating element thermostat thermal fuse
and neon bulb
the heating element is the heart of an
electric iron
the heating element coils are generally
made by the nicro material it has high
resistance and it can sustain in high
temperatures if you connect an ac supply
directly to the coil it will start
getting heat the magnesium oxide powder
is used to insulate this coil from the
metal case when the current flows
through a heating element coil
continuously the temperature of the coil
will become uncontrollable
here is the importance of a thermostat
the thermostat is used to sense the base
plate temperature and switch off the
current flow to the heating element coil
thermostat has input terminal output
terminal contact spring and a
bi-metallic strip
the bi-metallic strip consists of two
strips of different metals which expand
at different traits as they are heated
all metal expands when heated and
different metal has different expansion
rate example when you heat steel and
copper at the same temperature copper
strip expands more than steel strip
so if you stick both strips together and
heat again it will bend towards the
steel due to the lower expansion rate of
steel
this kind of strip is called a
bi-metallic strip and it is used to
sense the temperature of the electric
iron
when the base plate temperature
increases the bi-metallic strip bend and
pushes up the contact spring because of
this pushing force and spring tension
contact points disconnect and stop the
current flow when base plate temperature
decreases the bimetallic strip comes
back to its normal position and contact
points connect again for current flow
phase line connected to inputs terminal
of the thermostat and the neutral line
connected to the first terminal of the
heating element thermal fuse connected
between the output terminal of the
thermostat and the second terminal of
the heating element neon bulb connected
to both ends of the heating element and
earth line connected to the body of
electric iron when you switch on the
electric iron while the control knob is
in a high position current flow to the
coil through the thermostat without any
interruption
when the coil temperature reaches above
200 degrees celsius the thermostat
contact points disconnect and stop the
current flow when the temperature
reaches below 150 degrees celsius
contact points connect again and current
flow to the coil when you rotate the
knob to low temperature knob press down
the spring and make changes in spring
tension and disconnects the contact
points early than before
so iron box temperature doesn't go
higher than that particular temperature
and keep the iron box at a low
temperature
the thermal fuse is used to protect the
coil and avoid a firing when the
thermostat fails and overheats the iron
box thermal fuse fused and stopped the
current flow to coil hope this video
helps you to understand the working of
an electric iron and its internal parts
if you like this video please comment
your valuable opinion and subscribe our
channel for more videos
تصفح المزيد من مقاطع الفيديو ذات الصلة
Como funciona o aquecimento em nossa casa.🇮🇹
How does a thermal power plant works ? (in Hindi)
CARA PERAWATAN DAN PERBAIKAN SETRIKA LISTRIK
How to Use Your KSACN501 Thermostat
sửa ấm siêu tốc // ấm siêu tốc vẫn vào điện mà nước không nóng
Heat Engines and Thermal Efficiency| Grade 9 Science Quarter 4 Week 7
5.0 / 5 (0 votes)