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:
Feb. 25, 2020
Filed:
Jan. 26, 2017
Johnson Controls Technology Company, Plymouth, MI (US);
Shawn A. Hern, Park City, KS (US);
Brian D. Rigg, Douglass, KS (US);
Elton D. Ray, Wichita, KS (US);
Jedidiah O. Bentz, Witchita, KS (US);
Theresa N. Gillette, Wichita, KS (US);
Tom R. Tasker, Andover, KS (US);
Shaun B. Atchison, Wichita, KS (US);
Tyler McCune, El Dorado, KS (US);
Aneek M. Noor, Wichita, KS (US);
Johnson Controls Technology Company, Auburn Hills, MI (US);
Abstract
A system for heating a building via refrigerant includes a coil temperature sensor, an ambient temperature sensor, and a controller. The controller includes a processing circuit configured to record a system operating parameter and a control step of a control process before performing a sacrificial defrost cycle. The processing circuit is configured to cause the system to perform the sacrificial defrost cycle and operate the system at predefined system operating parameters other than the recorded system operating parameters. The system is configured to cause the system to operate at the recorded system operating parameters and generate calibration data in response to the sacrificial defrost cycle ending. The processing circuit is configured to cause the control process to operate at the recorded control step and cause the system to perform a defrost cycle based on the calibration data, the coil temperature, and the ambient temperature.