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. 25, 2026
Filed:
Mar. 26, 2024
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Yuki Mori, Tokyo, JP;
Ankush Chakrabarty, Cambridge, MA (US);
Arvind Raghunathan, Cambridge, MA (US);
Abstract
A multi-split type refrigeration cycle apparatus includes a refrigerant circuit including a plurality of expansion valves and a controller to set opening command values for the plurality of expansion valves. The controller sets target openings of the plurality of expansion valves to a plurality of provisional openings, respectively, in an initial step, and determines whether the plurality of provisional openings satisfy an inequality constraint in a first step. When the inequality constraint is not satisfied, the controller fixes one of the provisional openings to an inequality constraint end in a second step, and in a third step, the controller sets again as the provisional openings, points obtained by orthogonally projecting points representing the plurality of provisional openings on an affine hyperplane in a space reduced in order by exclusion of an already fixed provisional opening from the plurality of provisional openings, the affine hyperplane having as an intercept, a subtraction total opening calculated by subtracting the already fixed provisional opening from a total opening, and returns to the first step. When the inequality constraint is satisfied, the controller sets the provisional opening at a current time point as the opening command value in a fourth step.