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:
Nov. 30, 2021
Filed:
Jun. 15, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuki Watanabe, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An air-conditioning apparatus includes: a casing; a gas sensor placed in the casing and configured to produce a sensor output according to refrigerant concentration; a controller configured to detect refrigerant leakage by comparing the sensor output from the gas sensor with a first threshold used to check for refrigerant leakage; and an output device configured to issue an alarm. The controller causes the output device to issue an alarm when the sensor output from the gas sensor continues to be equal to or higher than a second threshold but lower than the first threshold higher than the second threshold for a predetermined set period, where the second threshold is set to a voltage lower than a limit voltage that indicates that sensitivity of the gas sensor has been reduced to zero by siloxane poisoning.