Rotary compressor and freezing cycle device using the same

Abstract

The invention provides a rotary compressor and a freezing cycle device which can inhibit slippage loss of an eccentric part of a rotating shaft and an eccentric roller, prevent flexible deformation and improve compression performance. The structure of the rotary compressor comprises that: the radius of the eccentric part of the rotating shaft is set to be Rc, the radius of a main shaft part is Rm,the radius of an auxiliary shaft part is Rs, the eccentricity of the eccentric part is e, a formula 1 which is Rc<Rm+e is satisfied, and a formula 2 which is Rc>=Rs+e is satisfied; the shaft length of a connecting part is L, the diameter of a shaft of the connecting part is phiD, and the shaft length (thickness) of the eccentric roller is H, a formula 3 which is (2L-H) / (D+2e)>=0.5 is satisfied; the differential pressure of a discharge pressure and a suction pressure is deltaP, the outer diameter of the eccentric roller is phiDro, the Young modulus of the rotating shaft is E, section moment ofinertia of the connecting part is M, the cylinder inner diameter of the connecting part is Di, and a formula 4 which is (deltaP*Dro*H*L<3>) / (E*M)<=0.02mm, wherein M=pi*(D<4>-Di<4>) / 64.

Description

technical field [0001] The present invention relates to a rotary compressor having a plurality of cylinder chambers and a refrigerating cycle device having such a rotary compressor constituting a refrigerating cycle. Background technique [0002] As a rotary compressor used in air conditioners and refrigerators, the rotary compressor disclosed in Patent Document 1 is a single-cylinder type rotary compressor having one compression mechanism, where the inner diameter of the cylinder chamber is Dcy , the height (axial length) of the cylinder is H, the shaft diameter of the eccentric portion of the rotating shaft is Dcr, and the axial sliding length (contact length) between the eccentric portion of the rotating shaft and the eccentric roller is L, H / Dcy≤0.4 and The structure of L / Dcr≥0.6, so as to realize the improvement of efficiency. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-14150 [0004] In the single-cylinder rotary compressor described in this patent...

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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