The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2018
Filed:
Jun. 22, 2016
Korea Institute of Energy Research, Daejeon, KR;
Gil Bong Lee, Daejeon, KR;
Jun Hyun Cho, Daejeon, KR;
Young Soo Lee, Daejeon, KR;
Hyung Ki Shin, Daejeon, KR;
Young Jin Baik, Daejeon, KR;
Ho Sang Ra, Daejeon, KR;
KOREA INSTITUTE OF ENERGY RESEARCH, Daejeon, KR;
Abstract
A heating medium supplied to an evaporator is used to heat lubricant oil in a screw compressor before the screw compressor starts up, and no additional heater for heating the lubricant oil in the screw compressor is required. When the screw compressor operates, the heating medium discharged from the evaporator after the evaporator is heated by the heating medium, is used to cool the lubricant oil. The lubricant oil heated by a lubricant oil heat exchanger is directly injected into a motor and a screw rotor so that introduction of a liquid refrigerant into a compressive chamber is reduced when the screw compressor starts up later. The lubricant oil introduced into the motor is discharged toward a lubricant oil storage portion before the screw compressor starts up so that the liquid refrigerant is prevented in advance from being introduced into the screw rotor when the screw compressor starts up.