Air conditioning system
US5139197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Sep 13, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F11/74
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In an air conditioning system of the type having air volume to each room controlled by individual dampers the improvement comprising a damper control unit for, on a trial mode, gradually changing the opening angle of each damper while the other dampers are kept fully closed; air volume measurement unit for detecting the air volume from a blower to measure the actual air volume; pressure difference measurement unit for detecting a difference in pressure between the outlet air and the inlet air of an indoor heat exchanger unit to measure an air feeding pressure difference with respect to an actual duct system; air volume calculation unit for finding the relationship among the air volume passing through the respective dampers, the opening angles of the respective dampers and the air feeding pressure difference, based on outputs from the pressure difference measurement unit, the air volume measurement unit and the damper control unit, to find air feeding resistance in the respective ducts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.