Enclosed compressor and refrigeration cycle device

Abstract

In the enclosed compressor (1), a motor section (11) and a compression mechanism section (12) connected to the motor section through a rotating shaft (13) are contained in an enclosed container (10). The compression mechanism section is provided with a cylinder (20) having an inner diameter hole (S), and also with a main bearing (21) and a sub-bearing (22) which have a bearing hole (N) rotatably supporting the rotating shaft and which close the inner diameter hole in the cylinder to form therein a cylinder chamber. At least either the main bearing or the sub-bearing has an annular groove (K) open to the cylinder chamber side. The inner peripheral surface of the annular groove has a tapered shape having a diameter gradually increased from the cylinder chamber side toward the side opposite to the cylinder chamber. The depth (L) of the annular groove is set greater than or equal to 40% of the diameter (D) of the bearing hole. Even if flexural deformation occurs in the rotating shaft due to a compression load in the cylinder, at least either the main bearing or sub-bearing is prevented from making partial contact with the rotating shaft, and this enhances the reliability of the compressor and extends the life of the compressor. The invention also provides a refrigeration cycle device which is equipped with the enclosed compressor to constitute the refrigeration cycle, thus enhancing the refrigeration efficiency.

Description

technical field [0001] The present invention relates to a hermetic compressor in which a bearing structure is improved, and a refrigeration cycle device in which the hermetic compressor is provided to constitute a refrigeration cycle (refrigeration cycle). Background technique [0002] In refrigeration cycle apparatuses, a rotary hermetic compressor is often used, in which a motor unit is housed in a hermetic container and connected via a rotating shaft (crank shaft). In the compression mechanism part of the motor part. In such a compressor, a refrigerant is introduced into a compression chamber formed in a cylinder and compressed, whereby a compression load acts on a rotary shaft. [0003] Therefore, the rotating shaft is bent and deformed, and if no measures are taken, the rotating shaft portion in the bending direction and the bearing that pivotally supports the rotating shaft will partially come into contact. The smooth rotation of the rotating shaft will be affected, ...

AI Technical Summary

Problems solved by technology

Therefore, localized wear occurs, and the reliability of the bearing cannot be sufficiently improved.

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