There are lots of ways to do this... I have mine working off the thermostat setpoint itself, versus having the on and off temperatures built into the rule. But probably best to start by getting this rule working, and then if you feel the need, expand after.
I think your biggest issue is that it is only going to kick in once at 8:00 and again at 22:00. Those are the two times the condition will change between true and false. So it will only control the AC unit twice a day.
I suspect what you really want is it to evaluate everytime the room temperature changes.
For simplicity to start, I'd probably make 2 separate triggers, one for day and the other for night. Put in the appropriate time restriction for each, so it only will run during those times. Then the trigger will be if the room temperature changes. You true and false rules should still work - just put the correct two in each of the two triggers.
EDIT: seeing how you are already using conditions, you could do one trigger - as stated above, the trigger will be the room temperature changing. Then your action will be first a general if-then with the time 8 to 22, and then the two simple conditional actions you have, then end the if. Then a second if/then for 22 to 8, under which you have the other two simple conditional actions you have above. Then end that if. That would combine the two triggers to one.
If confusing, let us know, we can create an example.