The invention relates to a combined cooling and heating collaborative optimization method for a central air conditioner, which comprises the following steps of: when cold and
heat load fluctuation is detected, according to the response speed difference of a cooling and
heating system, asymmetrically controlling the
time sequence and pre-starting or hot standby of equipment, so that the
time sequence of a cold and heat source is coordinated; potential physical interference nodes or cross paths are identified in the operation process of the cooling and
heating system, a hydraulic or energy transmission path is temporarily passivated, and the reverse
coupling influence between the cooling and
heating system is reduced in combination with hot side delayed water feeding and
cold side path adjustment; according to the method, the asymmetric control
time sequence and the cold and hot response
priority queue are introduced, the control windows can be dynamically distributed according to the cold and hot source response speed difference, the
system control conflict problem caused by simultaneous adjustment of the cold and hot sources is avoided, the cold and hot
system rush adjustment phenomenon is effectively relieved, and response adjustment is more orderly. By means of the pre-starting device and the hot standby mechanism, the device can be awakened in advance or maintained in the
heat balance pre-starting state before load fluctuation.