Variable refrigerant flow air conditioning system and method for controlling electronic expansion valve thereof
US10126029B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 26, 2016 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Apr 26, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.