Page 598 - Ultimate Visual Dictionary (DK)

THE MODERN WORLD
Microwave combination oven

CONVENTIONAL OVENS use electrically MICROWAVE COMBINATION OVEN
warmed elements or a flame to heat food. Turntable Door lock Display
In a microwave oven heat energy is created rotator screen Metal
cook/grill
by electromagnetic waves produced by a tray (non-
magnetron and led by waveguides into the Control microwave)
oven compartment. These microwaves panel
cannot pass through the compartment’s
metal casing, being reflected within and
spread evenly by a fan. But they do pass
through most types of plastic, ceramics, and
glass. Therefore platters or containers made
from these materials are suitable for use in
microwave ovens. A combination oven also Metal
Glass
has conventional heating elements, to grill cooking Metal turntable cover grill/griddle
Rollers (non-
and “brown” in the traditional fashion, either turntable (non-microwave)
microwave)
alone or in conjunction with microwaves.
Under-turntable roller
ring (non-microwave) Water molecules spin
HOW MICROWAVES HEAT FOOD with energy from
microwaves
Oxygen atom
Hydrogen
atom
Microwaves Making the
Each water make water molecules move
molecule in molecules vibrate generates heat
food has two
hydrogen
atoms and one
oxygen atom SIDE VIEW OF MICROWAVE COMBINATION OVEN
Magnetron assembly Waveguide Voltage regulators
Wiring loom Grounding wire to
case and chassis

Door Fan
electricity
supply
Control
panel
circuitry Main fan
Magnetron
Rigid metal
cooling fan
chassis
Voltage
transformers
Door safety cut-
out mechanism Thermal/
electrical
Low-voltage insulation
supply for
control circuits
Electrical
outlet
cord
High-voltage
Circuit board plug Electricity supply magnetron
to magnetron supply

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