Linear compressor and oil lubricating method thereof

Abstract

The invention provides a linear compressor and an oil lubricating method thereof. The linear compressor comprises an outer casing which accommodates refrigerating mediums and lubricating oil; an air cylinder, a piston and a piston shaft are arranged inside the outer casing; a gap is formed between the air cylinder and the piston shaft; a flange plate is configured on the outer peripheral surface of the air cylinder; an air cylinder cover is fixed on the flange plate; an exhaust valve is arranged on the internal side of the air cylinder cover on the end portion of the air cylinder; space which is defined by the piston, the air cylinder and the air cylinder cover is separated into a compression chamber and an exhaust chamber which are communicated through the exhaust valve; the linear compressor is provided with an oil storage air chamber which is communicated with the exhaust chamber and the gap; the lubricating oil is connected with the compression chamber through an oil suction pipe; the lubricating oil enters into the compression chamber through the oil suction pipe due to relative movement between the piston and the air cylinder; the lubricating oil and the refrigerating mediums are mixed inside the compression chamber to form into high pressure gas-oil mixture; the high pressure gas-oil mixture is discharged into the exhaust chamber; partial high pressure gas-oil mixture enters into the oil storage chamber and the gap is full of the partial high pressure gas-oil.

Description

technical field [0001] The invention relates to a linear compressor and an oil supply lubrication method thereof. Background technique [0002] Such as figure 1 As shown, the conventional linear compressor has a casing 1, and a recess is formed at the bottom of the casing 1, and lubricating oil is stored in the recess. The shell 1 is also provided with an air intake pipe 11 for leading the refrigerant medium into the shell 1 and an exhaust pipe 12 for leading the refrigerant medium out. A cylindrical housing 13 is accommodated in the housing 1, and a cylindrical outer stator 14, a mover 15, an inner stator 16, and a motor placed in the inner stator 16 are accommodated in the housing 13. Coil 17, cylinder 2 and other components, wherein the cylinder 2 is centrally arranged in the housing 13 along its axial direction, and the piston 3 and the piston shaft 4 integrally formed with it are placed in the cylinder 2 . An inner stator 16 is sleeved on the outer peripheral surface...

AI Technical Summary

Problems solved by technology

This kind of gas bearing can ensure the lubrication effect between the piston and the cylinder during high-frequency movement. However, the gas bearing has a strong dependence on the machining accuracy of the cylinder and piston, and the micropores are easy to be blocked, and its long-term operation reliability Difficult to guarantee

In addition, due to the low viscosity of the gas, in order to ensure the sealing effect of the compression chamber, the specified gap between the cylinder and the piston is often required to be small, resulting in high processing accuracy and easy to increase the production cost

[0009] It can be seen that the above two bearings of the existing linear compressor still have defects in improving the performance of the linear compressor and ensuring the reliability

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