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Operation theory of microwave oven
1. Microwave is a kind of high frequency electromagnetic
wave, which is commonly distributed in the nature.
But the existing form of microwave is dispersed so that
it cannot be collected together for heating purpose. The
key component of magnetron of microwave oven will
transform the energy of electricity to microwave and
huge energy of microwave field is established under the
closed cavity. So the molecule of food is caused to vibra-
te at very high speed and the friction heat produced will
cook the food in a fast way.
2. There are 3 properties of microwave, that is:
a) Absorbability, the microwave can cause the excess
vibration of molecule of various food so as to obtain
the heating purpose. But the infiltration ability is lar-
gely depends on the size, thickness and properties of
the food.
b) Penetrability, microwave can penetrate through ceramics,
glass, temperature-resistant plastics. It is required to
use the containers whose material have good micro-
wave penetrability to achieve best heating result. See
the below utensils guide.
c) Reflectivity, microwave would be reflected by the
metal wall of interior cavity so as to establish an even
magnetic field, thus can prevent the overheating of
partial area.
Installation of microwave oven
1) To ensure sufficient ventilation, the distance of the
back of microwave to the wall should be at least 10 cm,
the side to the wall should be at least 5cm, the free
distance above the top surface at least 20 cm.
2) Do not place any objects on the top of microwave oven.
3) The position of the oven shall be such that it is far from
the TV, Radio or antenna as picture disturbance or
noise may occur.
4) The appliance must be positioned so that the plug is
accessible.
Utensils guideline
Before use check that utensils are suitable for use in micro-
wave oven. Take the reference of below table. In the table
marked as “0“ is applicable, “ X ” is not applicable.
OPERATING INSTRUCTIONS
Microwave oven MWLG-22L
UK
Material of container
Microwave
Grill
Combination
Heat-resistant glass
O
O
O
Ceramic
O
X
X
Ordinary glass
X
X
X
Heat-resistant plastic
O
X
X
Ordinary plastic
X
X
X
Thin Plastic film
O
X
X
Metal Grill
X
O
O
Metal container
X
O
O
Note:
In “Combination” Function, only the shallow metal container can be used, and the metal container can never be pla-
ced directly on metal grill. In such case, Glass plate is needed to sandwich between. And metal grill shall not be placed so
as to touch the wall of cavity as sparkle is liable to occur, never use tie-over jar.
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