10 11
HEATER ASS’Y
HEATER
FUNCTIONAL PRINCIPLE
• The heater is named the PTC (Positive Temperature coefficient) heater, it is automaticaly controlled
the heating value by changing of the air flow
and temperature through the element.
• If the surface temperature of the PTC heater
exceed to Tc point, the resistance of the heater
increases rapidly, so it stops a rise in
temperature.
• The heating value increase in proportion to the
volume of the air flow through the heater, so it
is kept the certain temperature.
• At state of the certain volume of air flow, through
the heater, the same heating value will
generate even if the ambient temperature is
changed.
STRUCTURE
PLATE : t=0.5
FIN : t=0.22~0.3
171
±2.0
146
±1.0
44
±1.0
15
±0.5
- 0
ambient temperature
Resistance
Tc
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