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MW‐104384 EN
OPERATION THEORY OF MICROWAVE OVEN
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 vibrate at
very high speed and the friction heat produced will cook the food in a fast way. 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 largely 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 microwave
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
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. Do not place any
objects on the top of microwave oven. 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. The appliance must be positioned so that the plug is accessible.
The microwave oven is intended to be used freestanding and shall not be placed in a cabinet. To keep the
microwave oven at a distance from the wall, it is necessary to install a distance limiter.
UTENSILS GUIDELINE
It is strongly recommended to use the containers which are suitable and safe for microwave cooking. Generally
speaking, the containers which are made of heat‐resistant ceramic, glass or plastic are suitable for microwave
cooking. Never use the metal containers for microwave cooking and combination cooking as spark is likely to
occur. You can take the reference of below table.
Material of
Micro‐
container
wave
Heat‐resistant
Yes
ceramic
Heat‐resistant
Yes
plastic
Heat‐resistant
Yes
glass
Grill rack
No
Plastic film
Yes
Grill
Convection Combi Notes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
No
No
No
Never use the ceramics which are decorated with
metal rim or glazed
Cannot be used for long time microwave cooking
It should not be used when cooking meat or chops as
the over temperature may do damage to the film
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