Relay device and multi-split air-conditioning control systems
US11552818B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 21, 2019 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Jan 21, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/155
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A relay device and a multi-split control system that achieve reliable communication between an outdoor air conditioning unit and multiple indoor units under the condition that the length of a communication bus is limited. The system expands the communication distance by a cascade path formed by a plurality of relay devices. The cascade path transmits control signals sent by a master control device/a specific slave control device (i.e. a slave control device communicating with the master control device or certain relay device) to corresponding slave control devices one by one, and the corresponding slave control devices transmit the signals to the master control device/specific slave control device according to a response signal fed back by the control signal, where the relay devices may respectively communicate with a source node device and a destination node device on the basis of the master-slave type communication mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.