mistor is energized, the voltage across the tempera-
ture measurement circuit is measured. And after 21
seconds since the thermistor is cut off, the convec-
tion motor operates for 10 seconds.
The oven carries out the procedure above again. If
the second voltage is 0.3V higher than the first volt-
0 2
20
30
\ \
,
1
1 /
CONVECTION 1 1
H
,
I
MOTOF! ON j j
I i
32 64 ‘SW
age, LSI judges it is a fire in the oven cavity and
-’
I 1
OFF ; ;
i I
I
stops the oven.
! ; 3 set
I
When sensor cooking, the sensing fire operation is
-I I-
not carried out until the oven senses the steam from
THERMISTOR ON
3
food. Because food cannot be cooked well by rotat-
OFF j ’
I
ing the convection fan at that time. After sensing the
steam, the sensing fire operation is started.
When LSI judges it is fire in the oven cavity. LSI will
switch off the relays to the power transformer. fan
motor and convection motor and iSI stops counting
down. And then the damper is closed so that the
fresh air does not come into the oven cavity.
ON :
I
I
Sensing
VC/rage OFF
I
Sensing :he voltage ac:css te-aera:u*e ,~easJ:e-s+. C:~C,J f
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