Functions and control
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 fan control
Within three minutes of compressor starting, the compressor is controled according to the ambient temperature.
Tao
Tao <22
22 < Tao <28
Tao 28
Refrigeration/dehumidification
610rpm
610rpm
610rpm
Tao
Tao <<10
10 < Tao <17
Tao 17
Heating
760rpm
520rpm
400rpm
After 3 minutes, the compressor is controled according to the ambient temperature and the frequency of the
compressor.
Refrigeration/dehumidification
<32 Hz
32 Hz -43 Hz
43 Hz
frequency Hz 09K
22
610rpm
610rpm
610rpm
22-29
610rpm
710rpm
760rpm
Tao
29-38
760rpm
760rpm
800rpm
38
800rpm
Heating frequency Hz
<45 Hz
45-63Hz
63Hz
(09K)
10
760rpm
800rpm
850rpm
Tao
10-17
520rpm
760rpm
800rpm
17
520rpm
17
Domestic air conditioner
