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:
Oct. 28, 2025
Filed:
Jan. 28, 2022
Daikin Industries, Ltd., Osaka, JP;
Hikaru Seike, Osaka, JP;
Hirokazu Nakamura, Osaka, JP;
Mineo Inoue, Osaka, JP;
Kenji Ayado, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
A liquid deterioration determination device includes a light receiver and a determination unit. The light receiver receives detection light transmitted through a liquid or detection light reflected by the liquid. The determination unit determines a degree of deterioration of the liquid. The light receiver outputs first and second detection values. The first detection value represents an amount of a light component of a first color included in the detection light transmitted through the liquid or the detection light reflected by the liquid. The second detection value represents an amount of a light component of a second color included in the detection light transmitted through the liquid or the detection light reflected by the liquid. The second color is different from the first color. The determination unit determines the degree of deterioration of the liquid based on a ratio of the second detection value to the first detection value.