The pressure situation of the refrigeration system directly reflects whether there is a fault in the refrigeration system, and the pressure is too high and too low, which is the fault performance, so the pressure control device is very critical in the refrigeration system.
Here Mengma filter introduces the difference between the pressure controller and the pressure difference controller, for reference only.
The refrigeration system can be divided into two parts: high and low pressure. High pressure section from the compressor exhaust port to the throttle valve, this section is called high pressure pressure; The suction pressure of the compressor is called the suction pressure, and the suction pressure is close to the evaporation pressure, and the difference between the two is the flow resistance of the pipeline.
The evaporation pressure and condensing pressure of the refrigeration system are detected at the suction and exhaust ports of the compressor. It is usually called the suction and exhaust pressure of the compressor.
The difference between pressure controller and pressure differential controller
Pressure controller
Pressure controller used for pressure control and pressure protection, the unit has a low pressure and high pressure controller, used to control the working range of the pressure of the system, when the system pressure to the set value, the switch automatically cut off (or on) the circuit.
Differential pressure controller
Used as a pressure difference control, when the pressure difference reaches the set value, the switch automatically cuts off (or turns on) the circuit.
