MULTI-STAGE COMPRESSION TYPE ROTARY COMPRESSOR AND A SETTING METHOD OF DISPLACEMENT VOLUME RATIO FOR THE SAME

摘要

A MULTI-STAGE COMPRESSION TYPE ROTARY COMPRESSOR (10) IS PROVIDED WITH AN ELECTRICAL-POWER ELEMENT (14), THE FIRST AND SECOND ROTARY COMPRESSION ELEMENTS (32, 34) DRIVEN BY A ROTARY SHAFT (16) OF THE ELECTRICAL-POWER ELEMENT (14) IN A SEALED VESSEL (12). THE REFRIGERANT COMPRESSED BY THE FIRST ROTARY COMPRESSION ELEMENT (32) IS COMPRESSED BY THE SECOND ROTARY COMPRESSION ELEMENT (34). THE REFRIGERANT IS COMBUSTIBLE. THE REFRIGERANT COMPRESSED BY THE FIRST ROTARY COMPRESSION ELEMENT (32) IS DISCHARGED TO THE SEALED VESSEL (12). THE DISCHARGED MEDIUM PRESSURE REFRIGERANT IS COMPRESSED BY THE SECOND ROTARY COMPRESSION ELEMENT (34). ADDITIONALLY, THE DISPLACEMENT VOLUME RATIO OF THE SECOND ROTARY COMPRESSION ELEMENT (34) TO THE FIRST ROTARY COMPRESSION ELEMENT (32) IS SET NOT LESS THAN 60% AND NOT MORE THAN 90% BY USING THE MULTI-STAGE COMPRESSION TYPE ROTARY COMPRESSOR(10),A ROTARY COMPRESSOR(10) USING A COMBUSTIBLE REFRIGERANT CAN BE CARRIED OUT.FIGURE 1 & 12