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1. REFRIGERATION CONTROL:
CHILLER
COMPRESSOR
WORKING
CONDITION
CONDITION
refrigeration
running
One-stage micro
running
refrigeration
Two-stage
running
micro-cooling
heating
Stop it
The above are the four working states of the chiller controlled by the smart
thermostat. The shortest transition time between refrigeration and
micro-cooling is (about 5-10 seconds) and can be changed multiple times
in one minute.
If the heat load is turned on, the chiller mainly works in these two working
conditions, and the temperature of the cooling water can be precisely
controlled. (The water temperature fluctuates around 0.3 degrees Celsius
during the actual test.) When the heat load is turned off, the water
temperature is overshooted downward, and when the A0 set value is
reached, the refrigeration compressor stops working.
It is important to note that; There will be a time difference between the
conversion of the chiller working condition and the change of water
temperature, and the parameter A6 is the relevant parameter that
describes the inertia of the system, according to this parameter, the
controller can calculate the corresponding action advance, reduce the
overshoot of the water temperature.
CONTROL THE OUTPUT FUNCTION
REFRIGERANT
SOLENOID VALVE
WORKING CONDITION
end
Conduction
Conduction
Conduction
HEATING ROD
WORKING
CONDITION
Stop it
Stop it
initiate
initiate
- 12 -
REMARK
100% full power
refrigeration
40% power
refrigeration
20% power
refrigeration
heating rod work
No refrigeration,
only heating
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