Common problems with refrigeration compressors (5)

Why is it forbidden to allow liquid refrigerant to flow back into the compressor suction chamber?

If liquid refrigerant directly enters the compressor suction chamber, the compressor volume will become smaller and smaller during the rotation of the crankshaft, and the pressure will rise sharply, causing abnormal stress on the pump body parts and valve plates or even damage. Liquid hammer will also cause abnormal vibration and noise of the compressor.

In addition, after the liquid refrigerant enters the cylinder, it will “wash away” the lubricating oil on the surface of parts such as the piston and blades, resulting in a situation equivalent to “oil-deficient operation”, abnormal wear and even causing the compressor to seize the shaft.