compressor

Abstract

The compressor according to the present invention may include: a cylinder including an outer cylinder part and an inner cylinder part; and a blade part connected between the outer cylinder part and the inner cylinder part, the blade part being fixed to the casing. In addition, the rolling piston is slidably coupled to the vane portion while making a rotational movement between the outer cylinder portion and the inner cylinder portion to form an outer compression space and an inner compression space. Thereby, it is possible to reduce the weight of the rotating body, obtain low power loss with respect to the same cooling power and obtain a small bearing area, thereby reducing refrigerant leakage, and easily change the cylinder capacity in an expansion manner. In addition, refrigerants may be discharged toward each other in opposite directions in each compression space, thereby reducing vibration noise of the compressor. In addition, a back pressure groove can be formed on the upper surface of the drive transmission part of the rolling piston, thereby reducing the friction area between the rolling piston and the upper bearing, and making the rolling piston and the upper support caused by the oil filled in the back pressure groove. Frictional losses between the supports are reduced.

Description

technical field [0001] The present invention relates to a compressor, and more particularly, to a 1-cylinder 2-compression chamber compressor in which two compression spaces are formed in one cylinder. Background technique [0002] In general, a compressor can be applied to a vapor compression refrigeration cycle (hereinafter, abbreviated as "refrigeration cycle") such as a refrigerator, an air conditioner, or the like. For the refrigerant compressor, a constant speed compressor driven at a predetermined speed or an inverter type compressor in which a rotational speed is controlled has been employed. [0003] Compressors can be classified into: hermetic compressors, in which a motor drive, which is typically an electric motor, and a compression unit operated by the motor drive are disposed together in the inner space of a sealed casing; and open compressors , wherein the motor is separately provided outside the casing. Hermetic compressors are mainly used in domestic or co...

AI Technical Summary

Problems solved by technology

[0021] However, according to the aforementioned prior art 1-cylinder 2-compression chamber compressor, the piston 44 is fixed while the relatively heavy cylinder 43 is rotated, and thus results in higher power loss with respect to the same cooling power and large bearing area, thereby increasing the problem of refrigerant leakage

[0022] Furthermore, according to the 1-cylinder 2-compression chamber compressor in the prior art, a part of the outer peripheral surface of the cylinder 43 is closely attached to the inner peripheral surface of the upper case 41, so the diameter of the upper case 41 should be increased, To change the volume of the cylinder 43 with the rotational movement, and thus the casing 1 itself should be changed in an increasing manner, resulting in the problem that the volume of the compressor is not easy to control

[0023] Furthermore, according to the 1-cylinder 2-compression chamber compressor in the prior art, the first discharge port 41b and the second discharge port 41c may be formed in the same direction, so the refrigerant that is discharged first may cause a so-called pulsation phenomenon, thereby making Increased vibration and noise of the compressor

[0024] In addition, according to the 1-cylinder 2-compression chamber compressor in the prior art, since two compression chambers are formed at the same height, a torque load is unevenly generated as the pressure difference between these two compression chambers changes, whereas Make the performance of the cylinder 43 unstable, causing effects on noise, wear, or refrigerant leakage

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