Oil separator and method for manufacturing oil separator

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By arranging the valve pipe portion of the one-way valve inside the cylinder in the oil separator and extending it out of the cylinder as an air outlet pipe, the problems of excessive external welding points and pipeline waste in the existing technology are solved, achieving cost savings and reducing connection points.

WO2026153563A1PCT designated stage Publication Date: 2026-07-23ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO LTD

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Patent Information

Authority / Receiving Office: WO · WO
Patent Type: Applications
Current Assignee / Owner: ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO LTD
Filing Date: 2026-01-20
Publication Date: 2026-07-23

AI Technical Summary

Technical Problem

The exhaust pipe of the existing oil separator needs to be welded to the check valve and other system pipelines, resulting in too many external welding points and wasted pipelines, which leads to high costs.

Method used

Design an oil separator in which the valve tube of a one-way valve is arranged inside the cylinder, and the other part of the valve tube extends out of the cylinder as an air outlet, reducing external connection points. The valve seat and valve tube are connected by welding, and the valve core is used to achieve the check function.

Benefits of technology

The number of external connection points of the oil separator was reduced, saving pipeline length and lowering costs.

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Abstract

Embodiments of the present disclosure propose an oil separator and a method for manufacturing an oil separator. The oil separator comprises a cylinder body (100), an air intake pipe (210), an oil return pipe (310), and a one-way valve (400). The top of the cylinder body (100) is provided with a first cylinder opening (101), and the bottom thereof is provided with a second cylinder opening (102). The air intake pipe (210) is connected to a side surface of the cylinder body (100). The oil return pipe (310) is connected to the second cylinder opening (102). The allowed flow direction of the one-way valve (400) is a direction flowing out of the cylinder body (100), and the one-way valve (400) comprises a valve tube (410), a valve seat (420), and a valve core (430). The valve tube (410) is provided with a valve cavity (4101), and the valve tube (410) comprises a first portion (411) and a second portion (412) connected in an axial direction. The first portion (411) is located in the cylinder body (100). One end portion of the second portion (412) is connected to the first portion (411), and the other end portion thereof extends out of the cylinder body (100) from the first cylinder opening (101). The second portion (412) is fixedly connected to the cylinder body (100) at the first cylinder opening (101). The valve seat (420) is provided at an end portion of the first portion (411) away from the second portion (412), and is provided with a valve hole (4201) extending therethrough in the axial direction. The valve hole (4201) is in communication with the valve cavity (4101). The valve core (430) is movably provided in the first portion (411) so as to block the valve hole (4201) from or place the valve hole (4201) in communication with the valve cavity (4101).

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