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:
Aug. 24, 2021
Filed:
Feb. 26, 2019
Applicant:
Lennox Industries Inc., Richardson, TX (US);
Inventor:
Carl Travis Crawford, Hickory Creek, TX (US);
Assignee:
Lennox Industries Inc., Richardson, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24F 11/36 (2018.01); F24F 11/77 (2018.01); F24F 11/74 (2018.01);
U.S. Cl.
CPC ...
F24F 11/36 (2018.01); F24F 11/74 (2018.01); F24F 11/77 (2018.01);
Abstract
In a heating, ventilating, and air conditioning (HVAC) system using a flammable refrigerant, a concentration sensor is used to check concentrations in the conditioned air or other locations. If concentrations are detected indicative a catastrophic or large leak, a purge valve is activated to immediately purge the refrigerant from the closed-conduit circuit of the system to a safe location. With lesser leaks, the blower may be activated and the leak monitored.