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:
Dec. 21, 2021
Filed:
Apr. 05, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Hirotoshi Yano, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An air-conditioning apparatus includes: a suction-air temperature detection sensor that detects the temperature of air that is sucked into a heat exchange unit or the temperature of space to be subjected to heat exchange as a suction air temperature; a cooled/heated-air temperature detection sensor that detects the temperature of air blown from the heat exchange unit or the temperature of the heat exchange unit as a cooled/heated air temperature; and a control device, which includes a microcomputer or a hardware circuit. The control device acquires data on a temperature difference between the suction air temperature detected by the suction-air temperature detection sensor and the cooled/heated air temperature detected by the cooled/heated-air temperature detection sensor at different times as time-series data, and determines whether the heat exchange unit is dirty or not based on the time-series data regarding the temperature difference.