16(45)
refrigerant from the condenser through the drying filter 4 that flows to the liquid
pipe solenoid valve 5 and refrigerant indicator 6 after drying and impurity filtering,
and finally reaches the expansion valve 7. In the F-G process, the temperature of
high pressure liquid refrigerant decreases after thermal expansion valve throttling
and depressurizing. In the G-A process, the low pressure and low temperature
refrigerant exchanges heat with the chilled water through the evaporator 8, and the
temperature of cooling the chilled water reach the set value; The low temperature
gas refrigerant from the evaporator returns to the compressor, which circulates in
this way.
Hot-gas bypass function: when the temperature of chilled water reaches the set
temperature, the compressor continues to work. When the temperature drops to
the set temperature of the hot gas bypass valve, the hot gas bypass valve opens.
Part of the compressed high-temperature and high-pressure refrigerant directly
reaches the evaporator through the hot gas bypass valve, which neutralizes some
refrigerants and returns the compressor (without passing the condenser). The
refrigeration system achieves the balanced load and cooling capacity through the
hot-gas bypass valve, so that the compressor can work all the time while keeping
chilled water temperature accuracy at ±1℃.
Attention!
The electrical temperature controller of this water chiller has delayed start
function, and our company set the compressor start after three minutes.
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