Rotary fluid machine

Abstract

A rotary fluid machine is provided with a space having an optimum volume required for sealing refrigeration machine oil used in a compressor.  This allows the level of the refrigeration machine oil to be maintained to an appropriate level and makes the compressor small size, highly efficient, and reliable. A rotary fluid machine is provided, in a container thereof, with a crankshaft having an eccentric section, a compression mechanism driven by the eccentric section, and a closing member for closing the compression mechanism in the direction of the axis of the crankshaft.  The compression mechanism is provided with a cylinder, a roller provided in the cylinder and rotationally driven by the eccentric section, a closing member for closing the cylinder in the axial direction, a vane extending to the outer periphery of the roller and entering and exiting, according to an eccentric motion of the roller, from a containing section provided in the cylinder, and a spring for pressing the vane to the roller.  Recesses are provided in the outer periphery of the cylinder or the closing member.

Description

technical field [0001] The present invention relates to a rotary fluid machine installed in refrigerating and air-conditioning equipment and the like. Background technique [0002] In recent years, from the viewpoint of environmental load reduction and cost, the need for downsizing of compressors has been increasing. Taking an air conditioner as an example, the volume of the cylinder on which the compressor is mounted is adjusted in accordance with the cooling capacity of the air conditioner. Here, for a mounted compressor, the external dimensions of the compressor are changed according to the required cylinder volumes to obtain the optimum combination. In the case of developing a compressor with a small cylinder volume, for example, it is common to use similarly downsized current products. method to design. On the contrary, in the case of increasing the cylinder volume, the enlargement of the diameter of the compressor is unavoidable. For example, the relationship betwee...

AI Technical Summary

Problems solved by technology

When the liquid level is too high, the refrigerating machine oil is stirred by the rotation of the motor part arranged in the upper part of the airtight container, and the efficiency will be reduced due to power loss of the compressor, or the refrigerating machine oil will flow to the Disruption of heat exchange in the refrigeration cycle caused by spillage outside the closed container, or reduced reliability due to reduced efficiency due to pressure loss or insufficient refrigerating machine oil in the compressor

In addition, when the liquid level is too small, a sufficient amount cannot be supplied to the vane sliding part of the cylinder that requires oil supply from the side of the compression mechanism part, resulting in a decrease in reliability.

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