Infrared Camera: Refrigerator | I Didn’t Know That

now it’s time to look at an everyday
object using an infrared camera hot
things give off lots of infrared while
cold things give off less and this
camera can actually do what our eyes
can’t it can see the variations in
temperature there are about 30 million
fridges in the UK alone what will the
infrared camera reveal about this one
you ready rich Oh ready so what you see
black and very dark blue most of the
fridge is at plus four degrees Celsius
but because heat rises the top section
is at double that you have a look at the
freezers if there’s any difference you
can’t see any definition in there at all
it’s very cold well that’s a shock
revelation the freezer is cold
inside it’s around minus 18 degrees
Celsius so it’s no wonder that after
just seconds John his fingers have half
in temperature another few minutes and
he’d officially have frostbite until
1929 fridges used toxic gases including
ammonia and sulfur dioxide as coolant
unfortunately several fatal accidents
occurred today fridges use refrigerant a
man-made chemical which absorbs heat
it’s circulated by this compressor which
is the hottest part of the fridge the
refrigerant travels in the walls of the
compartment absorbing heat from the food
when it comes out of the back of the
fridge the liquid coolant is warm as it
travels down through these tubes it
cools down the change from red to green
represents a massive temperature drop by
the time it gets the bottom it’s cool
enough to pass inside the fridge again
you