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. 11, 2014
Filed:
Apr. 13, 2012
Roger Noll, Gahanna, MI (US);
Gary A. Helmink, Galloway, OH (US);
Pierpaolo Barbato, Noventa Padovana, IT;
Giuseppe Dalla Mana, Vigonza, IT;
Lou Monnier, Westerville, OH (US);
Roger Noll, Gahanna, MI (US);
Gary A. Helmink, Galloway, OH (US);
Pierpaolo Barbato, Noventa Padovana, IT;
Giuseppe Dalla Mana, Vigonza, IT;
Lou Monnier, Westerville, OH (US);
Liebert Corporation, Columbus, OH (US);
Abstract
A cooling system has a tandem compressor, a condenser, an electronic expansion valve and an evaporator arranged in a direct expansion cooling circuit. The tandem compressor includes a variable capacity compressor and a fixed capacity compressor. A controller controls the electronic expansion valve and selects which of a plurality of superheat control modes to use in operating the electronic expansion valve based on control parameters and a current operating status of each of the variable capacity compressor and fixed capacity compressor of the tandem compressor.