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. 02, 2021
Filed:
Aug. 29, 2019
Applicant:
Hitachi-johnson Controls Air Conditioning, Inc, Tokyo, JP;
Inventor:
Liming Yang, Mequon, WI (US);
Assignee:
Hitachi-Johnson Controls Air Conditioning, Inc, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24F 11/84 (2018.01); F24F 3/06 (2006.01); F25B 41/31 (2021.01); G05B 11/42 (2006.01); F25B 41/345 (2021.01);
U.S. Cl.
CPC ...
F24F 11/84 (2018.01); F24F 3/06 (2013.01); F25B 41/31 (2021.01); F25B 41/347 (2021.01); F25B 2600/2513 (2013.01); G05B 11/42 (2013.01);
Abstract
A refrigerant cycle of the present invention includes including an outdoor unit, a plurality of indoor units, and a controller for controlling the refrigeration cycle using at least one EEV. The controller comprises a velocity PID component executing a velocity PID control using pulse number for driving an EEV, three-state controller determining a driving state of the EEV and generating pulse commands designating the driving state, and a state machine driving the EEV depending on the pulse commands generated by the three-state controller.