Functions and control
When refrigerating, it is needed to satisfy
F-MIN-d(compressor’s Min_hz)< F<F-MAX-d(compressor’s Max_hz)
When heating, it is needed to satisfy
F-MIN-r (compressor’s Min_hz)< F<F-MAX-r (compressor’s Max_hz)
PID control :
The innital frequency Sn is determined by Pn . We can calculate Hzoutf according to the value of
Kp ,Ki ,Kd, Out_gain,Pn.Then , Fn = Sn + Hzoutf. The value of Fn is calculated in each sample time (60
seconds),and Fn is adujusted
●
according to
previous frequency of Sn and filtered output of Hzoutf.
7.1.2 The outdoor fan control (Exchange fan)
When the fan is
●
changed among every airflow speed (including stop blowing), in order to avoid the
airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, and then
●
it can be changed to another mode (when refrigerating, the time is changed to 15 seconds).
7.1.2.1 The outdoor DC fan control
Within three minutes of compressor starting, the compressor is controled according to the ambient
temperature.
Tao
（℃）
Tao <22
℃
22
℃
< Tao <29
℃
Tao
≥
29
℃
Refrigeration/dehumidification
5
1
0rpm
6
1
0rpm
7
1
0rpm
Tao
（℃）
Tao <<10
℃
10
℃
< Tao <16
℃
Tao
≥
16
℃
Heating
71
0rpm
61
0rpm
51
0rpm
After 3 minutes, the compressor is controled according to the ambient temperature and the frequency
of the compressor.
Refrigeration/dehumidification
<
4
1 Hz
56
Hz
≥
56
Hz
frequency
（
Hz
）
≤
22
5
1
0rpm
6
1
0rpm
7
1
0rpm
22
22-
29
5
6
0rpm
6
6
0rpm
7
5
0rpm
Tao
（℃）
29-38
6
1
0rpm
7
1
0rpm
800rpm
≥
38
800rpm
Heating frequency
（
Hz
）
<51 Hz
51-90 Hz
≥
90 Hz
≤
10
65
0rpm
70
0rpm
80
0rpm
Tao
（℃）
10
●
-17
4
6
0rpm
7
0
0rpm
800rpm
≥
17
4
6
0rpm
16
Domestic air conditioner
