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Walk-in cooler evaporation pressure adjustment principle and function
walk-in cooler evaporation pressure adjustment
adjustment walk-in cooler control elements: evaporation pressure regulator 11, bypass regulator 12, low pressure controller 13.
regulation and control principle: an evaporation pressure regulating valve is installed at the outlet of the evaporator of the high temperature library to ensure that the five walk-in coolers work at their required evaporation pressure. When only one walk-in cooler among the five walk-in coolers does not reach the specified temperature value, and the suction pressure drops to a given value, the bypass valve automatically opens, allowing a portion of the high-pressure refrigerant vapor to enter the suction directly. The air pipe keeps the suction pressure above the given value, avoiding the frequent start and stop of the compressor which should not occur.
water volume adjustment control element: water volume adjustment valve 17.
regulation control principle: Install a water volume regulating valve on the cooling water inlet pipe, and automatically adjust the volume of cooling water by sensing the size of the condensing pressure, and control the condensing pressure within the required range.
suction pressure adjustment control element: low pressure controller 13.
regulation control principle: the suction pressure is controlled by the low-pressure controller. When the five walk-in coolers reach the specified temperature, once the suction pressure drops to the low-pressure given value, the contact of the low-pressure controller is immediately opened and cut off The compressor motor power supply makes the compressor stop immediately.
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