How does a compressor create negative pressure, and what principles and mechanisms are involved in this process?
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How does a compressor create negative pressure, and what principles and mechanisms are involved in this process?
What the landlord wants to explain is that the compressor must not be operated under negative pressure.
The basic principle is that as the volume of the suction chamber increases, a negative pressure is created. Under this pressure difference, the gaseous working fluid enters the suction chamber through the inlet. At the same time, the volume of the compression chamber decreases, causing the fluid trapped within it to be compressed and its pressure to rise gradually. We sometimes also use closing the inlet valve of the ammonia compressor to create a negative pressure in order to draw out the oil. In general, hydrogen and nitrogen compressors must not operate under negative pressure; typically, there is a negative pressure interlock device at the inlet of the first stage, which causes the compressor to shut down automatically once the pressure drops too low.