Air conditioner control system using a public switched telephone network and method for operating the same
US6854660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Oct 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/1016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An air conditioner control system and method uses a PSTN (Public Switched Telephone Network). The system allows a remote control operator to control a plurality of air conditioners through the PSTN by providing receiving modules connected to the air conditioners which have unique IDs assigned thereto and which all use same telephone line. In an electronic device, a control program is driven to control and monitor the air conditioners. A transmitting module connected to the electronic device converts and codes a control command signal into a DTMF (Dual Tone Multi-Frequency) signal, and transmits the DTMF signal through the PSTN to a receiving module connected to a corresponding air conditioner, so that the air conditioner can be remotely controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.