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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.:

US 10739327 B1

PDFFull Text
Date of Patent:
Aug. 11, 2020

Filed:

May. 05, 2016

Apparatus and method for monitoring the quality of a lubricant in a compressor

Applicant:

Danfoss (Tianjin) Ltd., Tianjin, CN;

Inventors:

Yingke Sun, Tianjin, CN;

Dongdong Wang, Tianjin, CN;

Leping Zhang, Tianjin, CN;

Jingyuan Li, Tianjin, CN;

Pierre Ginies, Tianjin, CN;

Philippe Dewitte, Tianjin, CN;

Liang Fan, Tianjin, CN;

Assignee:

DANFOSS (TIANJIN) LTD., Tianjin, CN;

Attorney:

McCormick, Paulding & Huber PLLC

Primary Examiner:

David A Rogers

Int. Cl.
CPC ...
G01N 33/30 (2006.01); F16N 19/00 (2006.01); F25B 31/00 (2006.01); G01F 23/26 (2006.01); G01N 27/22 (2006.01); G01N 33/28 (2006.01);
U.S. Cl.
CPC ...
G01N 33/30 (2013.01); F16N 19/003 (2013.01); F25B 31/002 (2013.01); G01F 23/265 (2013.01); G01N 27/221 (2013.01); G01N 33/2888 (2013.01); G01N 33/2835 (2013.01);
Abstract

Provided is a monitoring apparatus used to monitor lubricating oil inside a compressor. The monitoring apparatus comprises a first capacitance detector (), a calculation unit, and a determining unit. The first capacitance detector () is disposed in a compressor () and is completely immersed in lubricating oil () inside the compressor (), and is used to detect a first capacitance value (Cn). The calculation unit calculates a relative dielectric constant of the lubricating oil inside the compressor according to the first capacitance value (Cn) detected by the first capacitance detector (). The determining unit monitors, according to the calculated relative dielectric constant, whether quality of the lubricating oil () inside the compressor () encounters an exception. Further provided are a method for monitoring quality of lubricating oil inside a compressor and an apparatus and a method for monitoring a fluid level of lubricating oil inside a compressor. The monitoring apparatus and method may accurately monitors quality and a fluid level of lubricating oil inside a compressor, thereby reducing a monitoring cost and improving monitoring accuracy.

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