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. 07, 2024
Filed:
Jan. 22, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuki Watanabe, Tokyo, JP;
Masahiko Takagi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An air-conditioning apparatus performs air conditioning by causing heat exchange between refrigerant cycling through a refrigerant circuit and indoor and outdoor air. The air-conditioning apparatus includes a sensor and a control determination device. The sensor measures concentration of any of the refrigerant leaked into the air. The control determination unit determines leakage of the refrigerant in a case when the concentration of any refrigerant leaked into the air is greater than a first threshold. The control determination device further determines an abnormality in the sensor in any one of a case where a cumulative time period of determined leakages is greater than a predetermined time period, a case where a cumulative number of times of determined leakages is greater than a predetermined number, and a case where the value indicating the concentration of any refrigerant leaked into the air is greater than a higher second threshold.