Energy-saving management device for central air conditioner

The utility model discloses an energy-saving management device for a central air conditioner, which comprises a refrigeration host machine, a refrigeration system and a cooling system, and further comprises a PCL (programmable logic controller). The PCL is respectively connected with a temperature module, a pressure module and a frequency converter communication module; a host machine communication interface, a switching value input interface and a switching value output interface are arranged on the PCL; the host machine communication interface is used for being connected with a high-level communication port of the host machine; the switching value input interface is respectively connected with a control button and various running state buttons; the switching value output interface is respectively connected with an electrically operated valve, a chilled water pump, a cooling water pump and a cooling tower; and the front end of the PLC is further connected with a human-computer interface for allowing people to operate directly. The energy-saving management device for the central air conditioner has the advantages that the structure is reasonable, the work efficiency of the refrigeration host machine is improved, and meanwhile, the electric energy is saved, thereby achieving an obvious energy saving effect; moreover, personnel arrangement is reduced, the management cost is reduced, and the service life of the refrigeration host machine is prolonged.