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. 02, 2025
Filed:
Jan. 12, 2024
Lennox Industries Inc., Richardson, TX (US);
Vickey Bhardwaj, Kancheepuram, IN;
Sangameshwaran Sadhasivam, Kanchipuram, IN;
Patric Ananda Balan Thobias, Chennai, IN;
Lennox Industries Inc., Richardson, TX (US);
Abstract
A method operating an HVAC system is provided. The method includes receiving a concentration of refrigerant. The method includes operating the HVAC system in a leak diagnostic mode if the concentration exceeds a gas concentration threshold. The method includes turning on a compressor to compress the refrigerant. The method includes receiving a first saturated liquid temperature and a first subcooled liquid temperature, and determining a first subcooled value based on the difference. The method includes turning off the compressor for a duration, and turning on the compressor after the duration has elapsed. The method includes receiving a second saturated liquid temperature and a second subcooled liquid temperature, and determining a second subcooled value based on the difference. The method includes determining that the first refrigerant circuit includes a refrigerant leak if the second subcooled value or the first subcooled value exceeds a subcooled threshold value.