Vortex compressor

Abstract

To reduce dead volume without increasing passage resistance of a discharge port, to reduce re-compression loss due to expansion of fluid remaining in the dead volume, and to enhance compression efficiency of a scroll compressor. A compression space 3 is defined by a fixed scroll 1 and a turning scroll 2. The fixed scroll 1 sucks and compresses fluid through volume change of the compression space caused by turning motion of the turning scroll 2. The fixed scroll is provided with a discharge port 11 for discharging compressed fluid and a discharge 50 valve for preventing backflow of the discharged fluid. The discharge port 11 has passages of a central portion 11b, an inlet, enlarged portion 11c and an outlet, enlarged portion 11d, which are enlarged in their cross sections than the central portion 11b. With this, the scroll compressor reduces inflow resistance and discharge resistance and substitutes the resistance reduction for reduction of the dead volume.

Description

technical field [0001] The present invention relates to a scroll compressor, which engages a fixed scroll member and a rotating scroll member to form a compression space, and the circular orbital motion of the rotating scroll member makes the compression space Move while reducing, and use this process to repeatedly suck, compress, and discharge fluid. Background technique [0002] As shown in FIG. 8, a conventional scroll compressor 60 has, as main components, an airtight container 12, a compression mechanism portion 14 composed of a fixed scroll member 1 and an orbiting scroll member 2, and a stator 18, a rotor 19, and the like. The electric motor 17 and the crankshaft 8 connected to the rotor 19 to drive the orbiting scroll member 2 are formed. In this scroll compressor 60 , a plurality of compression spaces 3 are formed between both sides where the fixed scroll 1 and the orbiting scroll 2 mesh. The orbiting scroll 2 is driven by the eccentric portion 9 of the crankshaft...

AI Technical Summary

Problems solved by technology

[0004] However, although the outlet expansion part of the discharge port plays the role of smoothly opening the discharge valve, it increases the total channel volume of the discharge port, that is, the uncompressed dead volume. In addition, the increase in inflow resistance affects the increase in overall channel resistance and Dead volume reduction limit, there is room for improvement in scroll compressor performance and dead volume reduction

[0005] In addition, the influence of the recompression loss due to the expansion of the refrigerant gas remaining in the dead volume is higher in high-pressure refrigerants ( For example, refrigerants such as carbon dioxide) have a great influence on occasions

In other words, there is a limit to the reduction of the dead volume, and from the point of view of recompression loss, there is a problem that the scroll compressor uses carbon dioxide as refrigeration to compress to the critical pressure

Images