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. 13, 2018
Filed:
Apr. 26, 2016
Gd Midea Heating & Ventilating Equipment Co., Ltd., Foshan, CN;
Midea Group Co., Ltd., Foshan, CN;
GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., Foshan, Guangdong, CN;
MIDEA GROUP CO., LTD., Foshan, Guangdong, CN;
Abstract
A method for controlling an electronic expansion valve of a variable refrigerant flow air conditioning system includes steps as follows: when operating in a primary heating mode, obtaining a degree of superheat of return air of a compressor, and performing a control on an opening degree of the first electronic expansion valve according to the degree of superheat; judging the degree of superheat and the opening degree of each refrigerating indoor machine in the plurality of indoor machines; and if the degree of superheat is greater than a first preset degree of superheat and an opening degree in any refrigerating indoor machine reaches a maximum opening degree, obtaining a target medium pressure value by calculating a refrigerant volume of the refrigerating indoor machine reaching the maximum opening degree, and performing a medium pressure control on the first electronic expansion valve according to the target medium pressure value.