The PHDG series high-power DC inverter scroll compressor is a high-end power platform specifically designed for large-scale commercial central air conditioning, industrial refrigeration systems, and heat pump equipment. This series covers a power range from 6HP to 16HP, with displacements from 50 cm³/rev to 98 cm³/rev, meeting diverse needs from large commercial buildings to industrial-grade refrigeration systems.
Some models are equipped with advanced EVI (Enhanced Vapor Injection) technology, enabling quasi-two-stage compression based on an economizer. This technology can improve system cooling efficiency by 7% to 10% and heating efficiency by 7% to 20%, delivering excellent heating performance especially in low-temperature environments. With a maximum condensing temperature of up to 85°C and a compression ratio as high as 19.8, it maintains strong heating output even in severely cold northern regions.
It adopts a dynamic oil balance pipe design that automatically regulates oil flow during multi-unit parallel operation to achieve dynamic oil level balance. A built-in gear oil pump forced lubrication system actively supplies oil through a high-precision gear oil pump, completely eliminating reliance on negative-pressure oil suction and significantly reducing wear risk during startup. The internal oil circulation pipe design quickly builds up oil circuit pressure, prevents oil accumulation, and enhances low-temperature starting reliability.
Q1: How is the speed of the PHDG series inverter compressor controlled?
A: Taking the AA55PHDG-D1Y2 as an example, there are clear requirements for the rate of frequency increase and decrease during compressor startup, operation, and shutdown. During the startup process, when the compressor switches from off to on, it must remain at the platform (40-75 RPS) for 1 minute or more before adjusting to the target value. This design ensures a smooth startup of the compressor, avoiding mechanical shock and electrical overload caused by sudden frequency changes.
Q2: What should I do if the PHDG series compressor's thermal overload protection trips frequently?
A2: Common causes of overheating protection and their solutions:
Q3: What should I do if the PHDG series compressor makes abnormal noises or has excessive vibration during operation?
A: Common causes of abnormal noise/excessive vibration:
Mechanical failure: Damaged valve plates, damaged bearings, wear of the scroll fixed and orbiting plates.
Liquid slugging: Excessive refrigerant/refrigerant oil, severe liquid return.
Installation issues: Loose foundation bolts, pipeline resonance, aging anti-vibration pads.
-
Motor issues: Electromagnetic noise, rotor rubbing against the stator — The compressor needs to be replaced.
