Provided is a multi-air conditioner central control system, which shares the physical network and control resources with a multi-air conditioner system so as to control a ventilation system in an integrated manner. The central control system includes a multi-air conditioner system including one or more...http://www.google.com/patents/US7669433?utm_source=gb-gplus-sharePatent US7669433 - Multi-air conditioner central control system
