Rotation-type compressor with housing low pressure, control mode of coolant and oil return and applications thereof

Abstract

A shell low-pressure rotary compressor and a control type and application for refrigerant and oil return of the compressor comprise a compression component and a motor component arranged in the shell. The compression component comprises one and more cylinders, pistons arranged in the cylinders, sliding pieces arranged in sliding piece trough of the cylinder, an eccentric crankshaft driving the piston and an upper bearing and a lower bearing supporting the eccentric crankshaft; the motor component comprises a motor rotor, and a motor stator; the shell is provided with a refrigerant diffluence device which is arranged on top or side surface of the shell; the refrigerant diffluence device comprises a diffluence pipe which is internally provided with a spring pipe which adjusts the diffluence rate. An air suction muffler is arranged between the motor component and the compression component; a radial spacing is arranged between the air suction muffler and a main bearing, and / or the motor rotor or the eccentric crankshaft or the upper bearing which is provided with a round plate. The invention has the advantages of high safety degree, low manufacture cost, smart operation, good lubrication performance, little oil consumption, high compression efficiency, and long service life.

Description

technical field [0001] The invention relates to a rotary compressor, in particular to a low-pressure rotary compressor with a casing, and a control method and application of refrigerant and oil return thereof. Background technique [0002] 100% of the common rotary compressors have the internal pressure of the shell as the high pressure side. The main reasons are: [0003] 1) When the internal pressure of the housing is on the high pressure side, the lubrication of the sliding vane and the piston is very easy due to the pressure difference between the internal pressure of the housing and the internal pressure of the cylinder, which is beneficial in terms of lubrication; 2) In order to press the front end of the sliding vane tightly When the piston is compressed and started, it is necessary to set the back pressure of the slide plate to a high pressure, which is the necessity of the working principle; 3) The lubricating oil discharged from the compression chamber of the cylin...

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Problems solved by technology

If the internal pressure of the shell of the rotary compressor is still on the high pressure side, then, in principle, the amount of refrigerant enclosed will increase, and for strong flammable refrigerants, the standard for the amount of refrigerant enclosed cannot be met due to fire safety reasons. As for CO 2 However, due to the obvious increase in the shell pressure, there are major issues such as not meeting the high-pressure safety standards.

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