Rotary compressor and refrigeration cycle device with rotary compressor

Abstract

The present invention provides a rotary compressor and a refrigeration cycle device capable of suppressing sliding loss between an eccentric portion of a rotating shaft and an eccentric roller, preventing deflection and deformation, and improving compression performance. The rotary compressor of the present invention adopts such a structure: assuming that the radius of the eccentric part of the rotating shaft is Rc, the radius of the main shaft part is Rm, the radius of the secondary shaft part is Rs, and the eccentricity of the eccentric part is e, satisfying Rc<Rm+e... …Equation 1, Rc≥Rs+e…Equation 2, when the axial length of the connecting part is L, the shaft diameter of the connecting part is ΦD, and the axial length (thickness) of the eccentric roller is H, it satisfies (2L-H ) / (D+2e)≥0.5...Equation 3, assume that the differential pressure between the discharge pressure and the suction pressure is ΔP, the outer diameter of the eccentric roller is ΦDro, the Young's modulus of the rotating shaft is E, and the section moment of inertia of the connecting part is M, when the inner diameter of the cylinder of the connecting part is Di, satisfy (ΔP·Dro·H·L3) / (E·M)≤0.02mm...Formula 4. Wherein, M=π·(D4-Di4) / 64.

Description

technical field [0001] The present invention relates to a rotary compressor having a plurality of cylinder chambers, and a refrigeration cycle apparatus having such a rotary compressor to constitute a refrigeration cycle. Background technique [0002] As a rotary compressor used for air conditioners and refrigerators, the rotary compressor disclosed in Patent Document 1 is a single-cylinder rotary compressor having one compression mechanism part, and the inner diameter of the cylinder chamber is Dcy , when the height (axial length) of the cylinder is H, the shaft diameter of the eccentric part of the rotating shaft is Dcr, and the sliding length (contact length) of the eccentric part of the rotating shaft and the axial direction of the eccentric roller is L, H / Dcy≤0.4 and L / Dcr ≥ 0.6 structure, thereby achieving improved efficiency. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-14150 [0004] In the single-cylinder rotary compressor described in Patent Doc...

AI Technical Summary

Problems solved by technology

[0006] Therefore, when designing the outer and inner diameters and axial length of the eccentric roller, the shaft diameter and axial length of the eccentric part of the rotating shaft, consideration should be given to suppressing the sliding loss between the eccentric part of the rotating shaft and the eccentric roller fitted therein during the actual compression operation. Meanwhile, if the prevention of deflection deformation due to insufficient rigidity of the link formed between the eccentric parts is not taken into account, the compression performance may be reduced

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