Whirlpool RJM 7800 Microwave Oven User Manual


 
WAVEGUIDE
\
MICROWAVE BASICS
MODE
MIXER
/
sy;;L:‘n METAL
BOTTOM
MICROWAVES BOUNCE UP FROM
THE BOTTOM
How a Microwave Oven Works
Microwaves are like radio waves or radar waves. They will
pass through
glass, plastic. paper and most other types of containers that are not metal
MIcrowaves
bounce
off metal and are absotied by food. When food
absorbs microwaves. heat IS created because water molecules in the food
are disturbed and bounce around colllding with each other Heat is created
by this bouncing and colliding like when you warm your hands by
rubbing them together.
When all safety systems are secure (door shut completely and the START
pad touched). electric current is allowed to reach the
magnetron tube.
The magnetron tube uses electricity to create microwaves. They pass
through a metal tunnel called the
wavegulde,
past the
wavetuner,
Into
the
oven cavity.
Just at the point where the mlcrowaves are about to go into the oven
cavity. WhIrlpool Microwave Ovens use a
mode mixer
(a slow-moving
metal fan) to scatter them. If all the microwaves went in the same direction.
they’d all bounce in the same direction, like water from a hose. Some parts
of the food wouldn’t be touched. The
mode mixer
works like a sprinkler to
spread mIcrowaves all around.
The walls, top and bottom of the oven cavity are metal. Microwaves will
bounce. around inside the oven until they are absorbed by food.
The food container rests on a sealed-in shelf above the metal bottom of
the oven cavity Because the food is above the metal bottom, microwaves
can get under it. through the shelf, to bounce up from the bottom Into the
food
The screen in the door
IS
designed to keep microwaves in the oven, yet
allow you to see inside.
There are three safety interlock switches designed to make sure that
microwave oven will not operate unless the door is closed and microwaves
are sealed tnside.
Do not tamper with any of these Interlock switches.
Usin the
On/
8
ff Switch
On the frame just Inside the door is an on off switch When fhe switch is
OFF, the microwave oven cannot be started accidentally The switch is
designed to help keep “little inquisitive fingers” from using the oven unless
you want them to When it is OFF, the clock will work, and you can use the
Minute Timer. but you cannot set the oven to cook or defrost
THE SWITCH
MUST BE ON FOR COOKING