DEVELOPMENT OF HIGH PERFORMANCE R410A SCROLL COMPRESSOR FOR GAS ENGINE HEAT PUMP

摘要

In order to respond to the increase of customer's demands for economical efficiency and environmental protection, we have developed a new scroll compressor using HFC-4 10A (R410A) for commercial gas heat pump (GHP) which is known for its energy saving and comfort. The new scroll compressor requires high efficiency as stated above. In addition, the operating time and the life span of the GHP compressor is long about 10 years. Therefore, the GHP compressor also requires high reliability. To meet these requirements, we have developed the compressor by adopting a new scroll profile and reduction of frictional loss in the thrust bearing. We have ensured high reliability of the strength of scroll wall and efficiency by a new scroll profile. And the loss of the thrust bearing has been minimized by the elemental friction test. By these technologies, the efficiency has been improved of 20% compared with the conventional reciprocating compressor. In addition, the reliability of the journal bearings has been improved by the oil tank installed separately from the compressor housing. This paper shows the specification and the technology of the GHP scroll compressor, which enables high efficiency and high reliability.