Rotary vane compressor, Wing-vane compressor, Compression mechanism, Non-contact vane, Friction loss
Low global warming refrigerants such as HFO (hydro fluoro olefin) -1234yf areÂ attracted as an alternative working fluid in air-conditioning and cooling systems to address global warming. However, it used to require larger compressor size due to the lower fluid density compared with conventional refrigerants such as R410A. Thus, a new wing-vane compressor which has no contraction between the vane and the cylinder is developed to prevent increase in the size without performance degradation. The structure of the wing-vane compressor is different from the conventional vane compressor. Therefore, a prototype of the wing-vane compressor was operated using R134a refrigerant to simulate HFO-1234yfÂ refrigerant. The results are as follows: (1) The steady operation is observed in the general operating condition. (2) The steady mechanism of vane is clarified by both experiment and simulation. (3) A simple lubrication structure is achieved by supplying the oil to the friction surface through the grooves with the partial arc guide bearings.